Best SIP Trunk Providers in the UK of 2026

Twilio

Twilio's Elastic SIP Trunking provides a robust and scalable solution for businesses looking to modernize their communication infrastructure. By leveraging the Session Initiation Protocol (SIP), Twilio enables seamless voice and multimedia communication over the internet, eliminating the need for traditional circuit-switched lines. With Twilio's SIP Trunking, businesses can quickly set up and manage phone numbers, reducing the time to create a new number from days to seconds. This flexibility is complemented by Twilio's global reach, allowing businesses to connect with customers worldwide with high-quality voice calls. Twilio's platform supports a range of real-time communication services, including voice calls, instant messaging, and multimedia conferences. The standardized nature of Twilio's SIP Trunking simplifies integration, avoiding the complexities associated with legacy carriers.

1,343 Ratings

Starting Price: $0.0085 per min

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Sonetel

Phone Numbers Worldwide + Customer Chat + Team Communication, in a single Free App. Have your own local phone number in any city or country worldwide. Showing a local number to visitors at your web site increases trust and sales. You can get it for free if you also use our free chat function at your website. Otherwise prices start at $1.79/month. Incoming calls can be answered for free in our new apps or be forwarded anywhere worldwide at the cost of a local call. We believe that globalization and entrepreneurship are the key drivers for making this planet a better place. By empowering entrepreneurs in the most remote corners of the world, with a communication solutions that remove distance and levels the playing field, we hope to contribute to this progress. About 170,000 out of those that have signed up – across 170 countries – have also become paying customers.

391 Ratings

Starting Price: $0

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LINXS Communications

LINXS Communications offers world class scalability. As your company grows so will your need for additional VoIP services. You let us do all the leg work, so you can focus on your business. With Cloud PBX business VoIP phones from Linxs Communications you can expect to see considerable savings on your phone bill while upgrading your business communications at the same time. LINXS Communications has the capability to allow you to make and receive calls from your mobile phone or a softphone straight from your desktop. Don't let hardware be a barrier to entry. Gigabit phones with high-definition (HD) audio and video gives outstanding clarity over the typical analog phone. 110+ unique feature rich options for you to pick from. We have what your business needs to succeed with plug and play VoIP phones. 24 x 7 x 365 Support located in the United States. Your calls or emails will get a response from the same support team every time.

Starting Price: $19.95

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Voyced

Hosted VoIP solution with a European focus and a local presence in over a 165 countries. As all our solutions are based on Premium Plus we give you the highest possible quality for the lowest price. All carry all types of numbers, from Geographic to National, TollFree and UIFN, Mobile VoIP, Elastic Pool solutions and much more. We also have our own Roaming products (physical and SIM solutions) too.

2 Ratings

Starting Price: $0.25 per user per month

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Global Call Forwarding

Buy toll-free numbers and local phone numbers from more than 160 countries without commitment. You can route incoming calls to any phone, PBX, or SIP worldwide. Our global network has multiple layers of redundancy. Make international outbound calls and show any of your business phone numbers as Caller ID. Connect our SIP trunks to your phone system or use the GCF softphone to make outbound calls. Easily set up and modify smart call routing features like auto-attendant / IVR, location & time-based routing, local ringback tones, simultaneous ring, customized greetings, call recording, voicemail, and more. Easily add or remove virtual numbers, change calling plans, download your invoices and call detail records, modify advanced features, reach live technical support 24/7, and contact your account manager.

1 Rating

Starting Price: $7.95 per month

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Sherweb

A secure and reliable solution for your online business. Everything you need to get started. A user-friendly control panel to manage your website. Experienced support technicians. Access to a huge library of pre-configured web apps for your website. With Sherweb as your trusted cloud partner, you’ll be surprised by what you can achieve. Our full-fledged cloud management platform, driven by evolving business needs, empowers IT professionals to leverage agile solutions paired with 5-star service by trusted experts they can count on. We’re born in the cloud – IT folks rest easy knowing our ever-expanding portfolio of innovative products has been hand-picked and pre-vetted, including a selection of proprietary software you won’t find anywhere else. We bring you a mature, powerful platform that doesn’t make you choose between saving time and saving costs. Automate and integrate just about anything, leveraging our cutting-edge APIs. 

1 Rating

Starting Price: $7.25 per month

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Spoke Phone

Spoke Network

Spoke is the leading platform for high-value, complex, and regulated conversations. Spoke guides employees to say and collect the right things so deals move forward and customers get better experiences. Spoke integrates with everything, personalizing conversations, driving productivity, and ensuring compliance. Trusted for over 250,000 conversations every day with features such as calls, SMS, WhatsApp, Team Inbox, programmable routing, Personalized IVRs, caller insights, forms, analytics, +more. The Problem Today, only a small portion of your employees are equipped or have the skills to have highly-contextual, complex, and personalized customer conversations. The Solution Spoke empowers every employee with the information and skills to hold high-quality compliant conversations that drive positive customer and business outcomes.

Starting Price: $15 per month

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Teliqon

High-level service in cloud communication, we provide DID Virtual numbers and SIP trunking, creating Cloud PBX, and other business solutions. We provide a wide range of first-rate telecommunication tools and services to increase your sales. Our exceptional assistance makes it easy to build and grow your business during all the stages. Businesses can expand new directions of communication with clients by using our Cloud PBX solution. Your employees can operate from anywhere and call any destination with Virtual Numbers (DID) which makes business present in any time and location, without any extra hardware or special setup. For SIP trunking our comprehensive network of direct and transit carrier interconnections enables our customers to have agile pricing and superior voice quality at the same time. A secure solution for any type of business from small to big which require safe phone communication with client in any region or country.

Starting Price: $0.99 per DID

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Ajoxi

Ajoxi is a leading provider of wholesale VoIP termination services, dedicated to delivering exceptional connectivity and reliability. Utilizing state-of-the-art equipment and advanced routing technologies, Ajoxi ensures that every call is of the highest quality. Their commitment to excellence is backed by a team of experienced technicians who monitor the network around the clock, 24/7. This proactive approach allows them to swiftly identify and resolve any potential issues, minimizing downtime and ensuring seamless communication for their clients. Whether it's for high-volume call centers or international communication needs, Ajoxi's robust infrastructure is designed to handle the demands of today's fast-paced digital world. Their focus on quality, reliability, and customer satisfaction makes them a trusted partner in the VoIP industry. With Ajoxi, you can expect nothing less than top-tier service and consistent performance that supports your business communication needs.

Starting Price: $ 3.00

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CloudCall

CloudCall is the only communications software dedicated to businesses who use CRMs. By capturing all calls and communications, and saving them into the CRM contact records, CloudCall helps businesses make more insightful decisions, stay in control of teams working from anywhere, and get more done faster. Let data drive your business Capture data from your communications, surface key insights, and automate key workflows. Saving time, increasing efficiency and profits. Get more control Keep everything in your CRM and see how your teams are doing from anywhere. Boost productivity and profits Make more placements, close more deals, get more done faster, with Click-to-call, Power Dialler and Automated workflows.

Starting Price: $15/user/month

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CM.com

Mobile communication and payments solutions. Combine messaging channels like WhatsApp with innovative payments to create true Conversational Commerce. We help companies communicate. Our customers use SMS, Voice and the world’s most popular chat apps: WhatsApp, Apple Business Chat, Google RCS. Start the conversation in the channel your customers prefer and let the AI bot do the talking. Integrate commerce in the conversation to drive conversions. CM.com is a licensed Payment Service Provider, offering a range of options for any channel with Apple Pay, Google Pay, WeChat Pay, Credit Cards and local payments like iDeal and Bancontact. CM.com is also a Ticketing platform helping festivals, museums and stadiums sell and manage any type of ticket. The Customer Data Platform takes marketing to a personal level. Identity and e-sign solutions assure authentication in any transaction.

Starting Price: $0/month

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Signalmash

Why work with giants like Twilio where your support requests will take forever to get a response? Signalmash is not just a CPaaS provider, we take pride in providing the best possible CPaaS support. Your developers can have a shared Slack channel with our developers for instant support. You can speak to our CEO anytime. Real-time and top-notch support means shorter development cycles and enables you to provide exceptional support to your own customers. SMS services we offer: SMS API SMS CPaaS SMS UCaaS SMS no-code sending platform 10DLC campaign support Short code SMS Toll-free SMS Voice services we offer: Contact center telecoms Voice termination Voice orgination Local numbers Short code numbers Toll-free numbers SIP Trunking Our No-code telecoms solutions: UCaaS to send SMS CCaaS to manage phone calls AI solutions Signalmash - experience the highest level of support, every step of the way - book a call with us to get expert advice!

Starting Price: $0

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China Telecom

China Telecom Americas

China Telecom (Americas) Corporation (CTA) provides customized, cost-effective and integrated network and communication solutions to its diverse base of customers. As a leading facility-resale private carrier with unique access to providers in Asia and the Americas, we offer a wide range of communication and data center services for multinational customers. CTA is headquartered in Herndon, Virginia, with offices in Chicago, Dallas, Los Angeles, San Jose, Sao Paulo and Toronto. Enterprises throughout the Americas trust CTA’s one-stop, turnkey solutions to meet the challenges of today’s complex business environment.

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Zen

Zen Internet

When you need it, combine broadband with line rental in one great value package. No scripts, just friendly experts here for you. Speedy access around the home with our fully featured dual band router. Use your broadband as much as you want, on all our standard connections. You'll keep the same monthly price on your monthly bundle when your 12, 18 or 24 month contract ends. Access your computer and files from anywhere in the world. We offer a full range of fast, superfast and ultrafast broadband packages, with a range of data usage packages, which include a static IP address. free market-leading FRITZ!Box router and our multi award-winning service and support as standard.

Starting Price: $41.22 per month

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SiriusTEK

We at SiriusTEK are here to help with any of your business telecom needs! We can provide your business with VoIP-hosted phone systems, eFax, SIP trunking, connectivity devices, internet services, internet failover, and video/audio conferencing services. Our name says it all, Sirius is the brightest star in the sky, a shining beacon of light and hope. Technology, experience, and knowledge is what we bring to your business. Whether you are just starting your business, upgrading/expanding your existing systems, setting up remote staff to Work From Home (WFH), or branching out to a new location, think of us as your one-stop-shop for all your telecommunications needs! We can provide you with a complete Return On Investment (ROI) analysis. Our clients typically see up to a 65% reduction on the pricing of their current services by switching to SiriusTEK. Improving collaboration, productivity, and faster internet speeds, all while saving money!

Starting Price: $10 per month

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Pulse

Pulse Telesystems Private Limited

Pulse is recognized as a leading provider of call center solutions that effectively utilize Web Real-Time communication to enhance the efficiency of call center operations. With nearly two decades of experience, Pulse has successfully assisted clients across Pan India, Northern America, and Europe in establishing seamless customer interactions at every touchpoint. By optimizing the customer journey and maximizing revenue and loyalty, Pulse enables businesses to meet their customers' requirements through personalized call center solutions equipped with advanced features. These features promote proactive customer engagement and deliver exceptional user experiences.

Starting Price: $14.51

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Xinix

Our cloud-based hosted phone system is simple and flexible with powerful call-management features. Start a free 14-day trial today. No obligation with monthly rolling contracts. Future-proof your business. Technology has exceptionally simplified the way businesses are managed and run today. As we speak, businesses across the globe are data-driven. Most organizations can now come up with useful and effective strategies just by analyzing data on their relationship and interactions with potential and current customers. This is all possible thanks to Customer Relationship Management (CRM) tools. Manage your desk phone from anywhere remotely, be it function keys, speed dial, directory, busy lamps, etc. The best VoIP UK provider, provides you with a complete mobile device management suite, solving urgent and complex business tasks when you are away from the office. Xinix offers a comprehensive suite of unified communications (UC) services.

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VoIPline Telecom

Take control of your business communications. No technical skills are required. VoIPline Telecom's phone system provides you with full control over your business communications using a visual block diagram accessible via any web browser. Drag-and-drop configuration: Add over 30 telephony configuration tools to the canvas with a simple drag-and-drop. Arrange objects as you like. Visual call flow customisation: Customise the flow for incoming calls by linking one object to another. The entire call flow is visually clear even for users with no technical skills - you can see every step of how an incoming call will be handled step by step. Separate call logic with tabs: In addition to a single call flow configuration canvas, a whole host of such canvases can be created. This can be useful to separate the call logic so as not to overcomplicate a single canvas.

Starting Price: $1.05

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SIPStation

Sangoma

SIPStation is a SIP trunking service that enables businesses to switch to VoIP, reducing telephony costs without sacrificing service quality. It offers guaranteed cost savings when transitioning from traditional telephony providers and supports seamless integration with PBX systems like Switchvox, PBXact, FreePBX, and others. Key features include number porting, allowing businesses to retain existing phone numbers; migration capabilities from traditional telephone lines without replacing existing VoIP-capable PBX systems; and SMS functionality for sending and receiving messages at competitive rates. It is scalable, allowing easy addition or removal of SIP trunks based on business requirements, and includes a bursting feature to extend usage beyond the total number of trunks. Direct Inward Dialing (DID) provides affordable phone and toll-free numbers, while built-in failover ensures call routing to alternative numbers during outages.

Starting Price: $19.99 per month

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Wiretap Telecom

Wiretap Telecom delivers a comprehensive suite of VoIP and SIP trunking services tailored for businesses seeking scalable, reliable, and secure communication solutions. Our user-friendly portal empowers users to manage services effortlessly, offering features like real-time call and fax analytics, detailed trunk operations logs, and call routing management. It supports multiple texting solutions, including Email2SMS, SMS App, and seamless PBX integration, ensuring flexibility in messaging needs. With international calling capabilities to all countries and the ability to manage multiple accounts from a single interface, Wiretap Telecom ensures global connectivity and streamlined operations. Our SIP trunking services are compatible with various PBX systems, including FreePBX, Yeastar, 3CX, and Asterisk, facilitating easy integration and enhanced voice capabilities.

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Hostcomm

Hostcomm is a hybrid intelligence customer service platform that combines AI and human agents to deliver efficient, personalized support. It automates routine interactions while maintaining quality, helping businesses reduce costs and expand their reach globally. The platform features multi-modal AI agents and remote visual assistance, enabling instant problem resolution without travel. Hostcomm’s WebRTC client offers secure, app-free voice, video, and chat across any device. Its advanced AI remembers customer preferences and past interactions to create natural, hyper-personalized conversations. With easy integration through modern APIs, Hostcomm helps companies scale faster and improve customer experience.

Starting Price: £45/month

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pascom ONE

pascom GmbH

pascom ONE is a cloud-based, all-in-one phone system solution that is designed to help companies upgrade their business communications by combining all your voice, chat, video and virtual fax into a single solution. pascom's Desktop and Softphone apps ensure that no matter where you work, in the office, in Home Office or on the go, you can stay connected with colleagues and customers from anywhere. By providing unified access to all your contacts, chats, team messaging and web meeting channels, pascom ONE is more than just a cloud phone system, it is the heart beat of all your essential everyday business communications.

Starting Price: €8.90/concurrent user/month

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GCI

Stay informed, connected, and available with caller ID, call waiting, call forwarding and voicemail. Get all the basics in one cost-effective package. Improve efficiency with anonymous call rejection, multi-distinctive ringing, call transfer, last-call return, speed dial, and three-way calling. Activate hunt groups to quickly get customers to the right member of your team. Work with a team of experts ready to create new capabilities for your business, fine-tune operations, or simply ease overhead. No matter your goals, we will develop solutions to help you meet them. Operate your current call manager with the support of this standard IP voice solution. Facilitate higher call volume with a circuit that enables you to simultaneously operate multiple phone lines. Save even more time and money with additional managed services, like this reliable VoIP solution. Stay connected with nationwide 5G coverage.

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Wavetel

Wavetel Business LTD

Formed in 2010, Wavetel has grown to become a leading provider of telecom services in the UK and rest of the world. Wavetel started as a wholesale operator offering Voice, SMS and Data services to other operators. In 2013 Wavetel launched its B2B services which includes VoIP telephony services, Connectivity, Virtual Numbers, SIP Trunks, Microsoft Teams Direct Routing, Mobile, SMS, Call Center Solutions for its valued clients and business partners worldwide. Over the years, our voice messaging offerings have constantly evolved as an enterprise solution allowing it to integrate with third party CRMs and business apps using our programmable APIs.

Starting Price: $13 per month

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Alianza

Our cloud communications platform is highly sustainable, cost effective, all-inclusive, and flexible — enabling service providers to quickly address evolving market demands and growth that on-premises solutions can't keep pace with. Whether your customers simply need phone services or want to enhance their services with mobility and collaboration tools, Alianza's cloud communications platform does it all. Scale seats up and down to meet your customer needs. Business collaboration tools with options for team messaging, video meetings, and more. It’s all covered — cloud provisioning, upgrades, security, enhancements, and maintenance — and there’s no need for an IT team to manage it. Leverage next-gen technology to offer your customers a broader portfolio of services, lower upfront costs, and reduced ongoing effort. Alianza makes upgrading to a next-gen cloud communications platform easy, highly profitable, and future-proof with agile software-as-a-service solutions.

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Peerless Network

Peerless Network is a disruptor and aggressive innovator in the telecommunications industry that delivers the most robust and cutting-edge portfolio of high-quality voice communications, such as SD-WAN (SASE), cloud PBX, SIP trunking, and toll-free, to our customers worldwide. Connect and collaborate everywhere with Peerless Network’s redundant and reliable network reaching 4,500+ interconnections in the United States, with additional services in Canada and the United Kingdom. Elevate your business with Peerless Network. We keep you connected with agile, cost-effective, simple-to-deploy voice solutions, and unmatched customer service to meet your work-from-anywhere business needs. Transform your business communications and collaboration with our best-in-class UCaaS platform (Cloud PBX) and our fully automated SIP trunking platform. Work confidently to drive your business outcomes with reliable, innovative, and high-quality voice services via our expanding global network.

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Sewan

More than ever, professionals need to be able to communicate with each other and with their customers. Whether in the office or on the move, our telephony solutions can be adapted to suit everyone’s needs. Fixed telephony, mobile telephony, trunking, contact center or even telephony in teams, business telephony is becoming ever more versatile. Sewan's solutions can be easily adapted to every need. The voice technologies used in our solutions guarantee optimum call quality and rock-solid reliability. We know that business needs can change rapidly. Adding or deleting lines, and importing contacts, it's all done in the blink of an eye. Whatever type of business telephony you choose, our solutions are designed to be as cost-effective as possible, there's nothing superfluous. Our solutions are designed with the international market in mind: all our packages can be adapted to different needs.

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Pulsar360

Now your customers can truly work from anywhere with a feature-rich mobility solution with the mission-critical features they need. We enable you to save money with built-in redundancy and instant provisioning of SIP trunks, DIDs, and toll-free lines. Pulsar360 Corporation's Voice over IP (VoIP) solutions provide high-quality voice communications, which can be delivered over affordable broadband service from other providers and/or Pulsar360-managed carrier services. Customers save money and increase productivity by streamlining their communications into a single network connection for phone service and high-speed Internet. Having invested more than ten years in perfecting our VoIP platform, we have created one of the most sophisticated, highly-automated systems in North America. With this innovation, we can offer instant provisioning of SIP trunks, hosted and hybrid VoIP PBXs, local and international DIDs, toll-free numbers, as well as advanced management capabilities.

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Spectrum Enterprise Trunking

Spectrum Enterprise

Your business needs voice and collaboration solutions that employees can use anywhere, and those solutions are only as reliable as the network they run on. Delivered with a service-level agreement guaranteeing 100% uptime over our fiber network, our voice products are designed to reliably connect your business and scale to support your needs as they change and grow. Empowering today's mobile and distributed workforces starts with making sure your teams can communicate and collaborate efficiently. Ensure they have seamless access to voice calling, virtual meeting rooms, instant messaging, and other collaboration tools anywhere, anytime. For businesses looking for simplified deployment and fast installations, Unified Communications with RingCentral delivers a complete, out-of-the-box phone system for messaging, video calling, and voice. It can even be customized for different use cases with broad integration compatibilities, quick and easy deployment, and bring-your-own-device options.

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BICS

No matter where you, your employees, customers, or partners are, everyone is just a call or a text away. Our robust and reliable network powers communications worldwide. Our solutions cleverly merge the platforms you use and enable a seamless user experience for your employees and customers. BICS is a Communications Platform as a Service (CPaaS) that empowers enterprises to create and manage multichannel communications campaigns globally. Utilizing a low-code visual builder, businesses can design customized communication flows without writing code, integrating channels. It ensures reliable service delivery through BICS' carrier-grade network, which spans over 180 countries and connects with more than 900 operators, providing quality of service, delivery, and security. It integrates seamlessly with existing tech stacks, including CRM systems and collaboration tools, facilitating streamlined operations and enhanced customer engagement.

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Best SIP Trunk Providers in the UK

Compare the Top SIP Trunk Providers in the UK as of February 2026

What are SIP Trunk Providers in the UK?

Twilio

Sonetel

LINXS Communications

Voyced

Global Call Forwarding

Sherweb

Spoke Phone

Teliqon

Ajoxi

CloudCall

CM.com

Signalmash

China Telecom

Zen

SiriusTEK

Pulse

Xinix

VoIPline Telecom

SIPStation

Wiretap Telecom

Hostcomm

pascom ONE

GCI

Wavetel

Alianza

Peerless Network

Sewan

Pulsar360

Spectrum Enterprise Trunking

BICS

Best SIP Trunk Providers in the UK

Compare the Top SIP Trunk Providers in the UK as of February 2026

What are SIP Trunk Providers in the UK?

Twilio

Sonetel

LINXS Communications

Voyced

Global Call Forwarding

Sherweb

Spoke Phone

Teliqon

Ajoxi

CloudCall

CM.com

Signalmash

China Telecom

Zen

SiriusTEK

Pulse

Xinix

VoIPline Telecom

SIPStation

Wiretap Telecom

Hostcomm

pascom ONE

GCI

Wavetel

Alianza

Peerless Network

Sewan

Pulsar360

Spectrum Enterprise Trunking

BICS

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