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We'd like to keep this list updated with the latest information. If you know of a service provider that can offer a SIP service 'today', please provide a link and description of the service here.
<<< A - K ... L - Z >>>
onsip/Junction Networks - Business Class VoIP Provider offering inbound; outbound and toll free inbound SIP service. Over 1; 000 business customers; unlimited simultaneous calls; immediate phone number provisioning.
7AAA VoIP termination - VoIP termination from 7AAA Corp. SIP and H323 VoIP solutions. Wholesale long distance VoIP termination.
Abbatel - A global service provider gives oppurtunity to make calls from any where to any where. We are wholesaler of DID and termination; too. And we have program for those who want start business in SIP; VoIP
AccessOne Technologies - We are a SIP VOIP provider looking to do wholesale terminations in the US and Internationaly using G.729.
ACTfone - The only SIP service provider in The Maldives. Free and unlimited VoIP to Voip calling service.
Actica Communicatins Corp - Actica Oofer telcom products worlwide all using SIP. We Offer DID's in over 50 countries and much more
Advanta Technologies; Inc. - We provide US and International SIP PBX and Call Center based hosting service - wholesale and retail.
[Company] : Advanta Technologies; Inc.
AEMcom Srl - SIP and H.323 Italian Service Provider; Toll by-pass; Telecommunication Operator; Internet Services; Telephone Services; Wireless; Services.
(aq) Limited - UK based VoIP service provider using the SIP protocol. Geographic and non geographic numbers available.
AG Projects - SIP redirection service - Register your Personal Internet Domain Name with Managed DNS for £ 20/year. With this you will receive two personal SIP addresses and unlimited WEB, E-mail and Voice over IP redirection.
Agsm Telecomunicazioni - Hosted SIP Services
AirTouch - AirTouch Singapore provides secured VoIP solutions based on SIP to regional banks; stock broking firms and government agencies.
Akabis.com - Akabis specializes in providing wholesale VoIP termination; SIP trunking to regional and national ISPs; resellers; small and medium CATV companies; municipalities and niche VoIP markets.
AlienVoIP.com - AlienVoIP.com is MobiWeb's flagship product. AlienVoIP intended to serve Malaysian and global market. We provide SIP Server for customer.
aloip.com - Internet Telephone service providers all in spanish for South America
Allied Telecom & Marketing - We are one of the leading suppliers of Telecommunication services on SIP & H323.
AlphaNet P/L - SIP to SIP, SIP to PSTN (Australia), FreeCall to Hong Kong
Altecom - SIP/IAX/H323 High Quality Calling A-Z termination. DDIs/DIDs of many countries. Free calls between our clients. Low latency and BGP4 Network. Professional technicians with experience.
Amitelo Communications - Connecting urbanizations in southern Spain to Amitelo's network via wireless technology combined with the SIP technology
Antratel Pty Ltd - Our "SIP eXchange" has more than 300; 000 clients every day and more than 6000 VoIP providers. Many big companies like Deutsche Telecom. Support all routes in the world
APEX Telecom - APEX is a California CLEC provides integrated services to small and medium businesses in US. Company also develope a global SIP Based platform to provide vlaue added serivce in additonal to traditional voice and data services.
Ascent Telecom - EnduraTalk is a PC based Softphone that uses SIP signaling protocol to let you make calls on IP. It features an easy-to-use GUI (Graphical User Interface) that allows callers to make VoIP calls.
Asnatel Ltd - Provides A2Z SIP Wholesale VOIP Termination; SIP Based Resellers System
AT&T - AT&T's VoIP Services help your business evolve to the next generation of converged communication services. Enhancing employee productivity, reducing operational expenses and gaining the efficiencies of a unified network help you attain the leading edge over your competition. AT&T's VoIP services are delivered with the quality of service, reliability and security required for your mission critical business communications. Powering these services is AT&T's world-class global, IP-MPLS network, which is standards-based and designed to support open protocols such as Sesion Initiated Protocol (SIP) which provides the interoperability and scalablity that your business needs for next-generation communication applications.
AZTEL USA INC - Vonage Type Services for wholesale and retails. SIP/H323 wholesale Termination.
B2 Bredband AB is a market leader in the area of broadband communication in Sweden and offers fiber to the building, LAN-Ethernet broadband services to households and small companies. Its goal is to create the worlds first genuine two-way broadband infrastructure with access to data, voice and video. The company is present in Sweden, Norway and Denmark.
Babble.net Limited - Britain's favourite SIP provider with almost 100; 000 registered users; UK DDI numbers and 1000 free minutes to most global landlines for subscribers
BandTel is igniting the SIP Trunking industry with its industry-first technology advances. As a service provider of next-generation VoIP termination to the PSTN for high volume telecom users, it specializes in a fault tolerant architecture, which solves the throughput and redundancy problems on high capacity SIP-based networks. BandTel's unique ability to cost-effectively connect toll-quality calls instantly unites businesses worldwide. Rate plans for Local, Long Distance, Int'l, DIDs, 800#s, & Conference Calling are formulated to save Call Centers and Enterprise Users 40-60% from the traditional telecom costs.
Bandwidth.com - SIP service provider in the US that offers hosted VoIP solutions, SIP Trunking, and wholesale/enterprise SIP Origination and Termination services.
Bell Canada - Canada's national leader for communications in the Internet world, provides connectivity to residential and business customers through wired and wireless voice and data communications, high speed and wireless Internet access, IP-broadband services, e-business solutions, local and long distance phone and directory services.
BlasterPhone - BlasterPhone offers features-reach; high-quality Internet Telephony services and SIP solutions to individual users; small companies; large enterprises and carriers worldwide.
Blueface - Blueface is a SIP based VoIP provider providing residential and business users with a phone service over an existing broadband Internet connection.
Bophone.net is a Swedish SIP provider with focus on the residential market. Full SIP service - SIP with PSTN termination.
BRAVO! hIPer Telefonia - BRAVO provides SIP phone services and solutions for residential and corporate customers from Brazil with high quality and low rates. We also provide advanced solutions for callcenters.
www.bridgeconference.co.za - www.freevoip.co.za - Now offering you a free SIP service and directory where you can join and lookup anyone in our directory of users and get in touch with them for free!
Broadband Phone Pty Ltd - VOIP service, Free PC-to-PC sip service, Prepaid PSTN service, DID in Australia, New Zealand, USA
Broadband Telephony Sweden - Swedish SIP -> PSTN services
BroadVoice - The BroadVoice service is based on the SIP protocol, allowing the company to accommodate a wide range of end user devices including a small analog telephone adapter (ATA) that allows the consumer to connect the service to their existing telephones.
Broadvox - Broadvox GO! SIP Trunking local calling; discounted LD; toll-free; E911; DIDs; LNP; extended local numbers for remote workers; business continuity; dynamic load balancing and geographical distribution
Broadvox Direct, Llc - Residential and SOHO VoIP service, Carrier services (VoIP transport)
BT - BTexaCT is currently undertaking an extended evaluation of SIP technology, with rigorous interoperability testing and the demonstration of advanced SIP-enabled services
BusinessEdge Solutions - Highlights include proven success in delivering VoIP solutions and the first Multiple System Operators Session Initiated Protocol-SIP-based voice-mail application.
Callcentric - Callcentric's Agent offering SIP VoIP service. Unlimited Plan to over 30 countries or Pay Per Call. Offering this service to hispanic community around the world.
Call Union - Call Union for VoIP to VoIP and VoIP to PSTN using SIP
CALL2UA - Cheap phone calls over internet from CISCO ATA-186 ; PC or any H323; SIP; IAX; FXO or FXS device. Wholesale phone calls termination.
call4less - We are a Belgian Sip Provider. We provide SIP Account; DID Number; very cheap call everywhere in the world; call in Belgium for only 0.02€/minute
Callcentric - Callcentric allows people worldwide to make and receive phone calls over the internet to each other using SIP. Free accounts. Free calling On-Net and to all SIP URI's. Paid services available.
CallCentric Agent - Agent from CallCentric SIP VoIP service. Specialized in LatinAmericas customers. Service unlimited residential plan rate at US$ 29.95 to call most Latin landline phones (Peru; Argentina; etc.)
Callserve - ITSP offering High Quality Calls via SIP Softphone or Gateways
CDS - 1.1 cent per min. to USA-48 with great quality; supporting all codecs. Sign up now for a free $0.25 test account . Call center; telemarketers; auto dialers are welcome here.
We support SIP / IAX2
Checkbox - SIP Voip Carrier; SIP Virtual Contact center; SIP broadcast; 1 to all USA and Canada exellent A-Z rates.
Cliconnect Internet Telephony - Cliconnect uses high-quality VoIP technology to offer SIP based Internet Telephony services for business and residential customers.
DDI2.net - SIP based VoIP provider with instant DDI / DID landline numbers and interconnect. Provides DDIs for any SIP connection. Competitive rates for landline calling.
Dialdirect.Net - World Wide SIP Services. Custom network plans for Carriers; Call Centers; Corporations
Dial Distance INC is a provider of VOIP SIP telephone services; is a PC to Phone service created and run by a leading USA Internet Service Provider; VOIP Creation Group
Dialpoint Communications Corporation - SIP Carrier and Business Origination and Termination Services.
DIDLive - Flat Rate Inbound USA DIDs to over 2500 Cities
DigiLinea - A next generation SIP protocol VOIP network and offers two flavors of the DigiLinea service: DigiLinea, for customers with existing broadband internet service; and Portable DigiLinea a nationwide dial in VOIP platform for customers who want to take advantage of VOIP calling from their home, business, or cell phone. The two services provide DigiLinea with the first VOIP service that provides 100% coverage to the Hispanic market.
Digisip - Digisip AB is the Scandinavian leader in creating new cool services based on the SIP protocol for the broadband Internet.
DSL.net is a leading nationwide provider of broadband communications services to businesses.
Easy Office Phone - Easy Office Phone is a hosted pbx provider and offers a complete set of pbx features including ip phones. They also offer sip trunking services for asterisk; trixbox and other ip pbx systems.
h h h h h h h h h h h h h h he-fon GmbH - Connect your SIP phones to our network and get a Swiss Access Number. We offer a wide range of IP Services.
Earthlink Headquartered in Atlanta, EarthLink provides a full range of innovative access, hosting and e-commerce solutions to thousands of communities over a nationwide network of dial-up points of presence, as well as high-speed access and wireless technologies.
Ecuity Advanced Communications - Nationwide SIP Based IP Telephony Services: IP PBX, Trunking, CLEC, ISP, VoWiFi, based on Broadsoft.
ENACCS Communications - Elite Open SIP Network; IPPBX; Softphones; Sip Trunking; SIP Terminations; Mobile SIP Solutions and more.
Exchange Communications - We are one of the leading companies in the UK; and are platinum resellers of Avaya; for both Enterprise and SME companies; we deliver all managed services including SIP solutions for IP Telephony
eStara - Push To Talk(sm), eStara's Web Voice product allows eBusinesses to talk live to their customers over the Internet and simultaneously share data to speed the handling of calls, respond more efficiently to customers' needs and close more online sales. Customers simply click a button placed on web sites, in emails and in online ads to make a call. There are no numbers to dial or extra phone lines needed. For PC users not equipped to use web voice, eStaraVoice offers a quick call back to any open phone line. eStara's other products include the eStara Softphone, SIP Proxy, Online Chat, and Conferencing Software.
EUROWEB ROMANIA SA - Global telecom, providing VoIP services (incl. SIP) and traditional telephony. Also ISP, IP provider and data carrier (especially for Central and Eastern Europe)
Free IP Call/Global Network - VoIP service provider and SIP Telephony network over NET.
Freespeech - Freespeech provide a flexible low cost SIP VoIP service for the home and small business user.
Free World Dialup (FWD) allows you to make free phone calls over the Internet using a 'regular' telephone or a computer program.
Freeway Communications - SIP and .323 VoIP Billing Package written for Linux OS and LERG based systems. SER softswitch with various application packages. CoLo in LA; CA. with fully managed services.
FTT Comm. Corp - SIP A to Z termination for all type of busines with no volume
Future Nine Corporation - Internet Phone Service and Pay As You Go VoIP; BYOD SIP welcome.
Gafachi Communications - Gafachi Communications is a wholesale SIP carrier offering A-Z Termination and Origination (DID and Toll Free). Our network supports any SIP-enabled device. We offer unlimited concurrent calls, instant
provisioning, on-line account management and T.38 Fax Support.
GepardTel - SIP based VoIP provider. No monthly fees.
Global Crossing - Global Crossing offers a full range of managed data and voice services on a global basis; including SIP based connections to customers for inbound and outbound VoIP call completions.
GlobalNet - SIP Enabled VoIP Network integrated with Global Mobile Satellite Service
GlobaltelIP - We are a SIP based business grade VOIP service provider. We provide phone to phone, pc to phone and pc to pc communication using VOIP.
Global Voice Networking - Global Voice Networking offers Corporate SIP and VPN solutions for single and multisite companies without the need to upgrade existing legacy voice platforms therefore maximising SIP cost benefits.
Globe7 Inc - Globe7 is first SIP softphone integrated with MP3 player and Internet Explorer. Evaluation version is free. It comes with an US phone number. Final version is going to be powered by MPEG4 Realtime video.
Glowpoint - Carrier-grade IP-based video communications service provider (full SIP support of the RADVISION viaIP solution)
grnVoIP - Pay-as-you-go Retail Quality A-Z SIP Termination at Wholesale Rates
GSN2U - SIP Service in Malaysia
Halloo "virtual PBX" service offerings are built on a next-generation voice application platform that combines phone, email, fax, web and instant messaging to deliver advanced communications features to individuals and small businesses. By taking advantage of open standards such as XMPP, SIP and HTTP, the Halloo voice application platform is able to respond quickly to the evolving feature requirements of customers in the exploding market for hosted communications services.
HiTech Telecom - SIP & VoIP Wholesale Solutions; Integrators and full service providers
Hostcomm - Hostcomm provides hosted IP telephony; voip and contact centre solutions based on SIP to small and medium enterprise (SME) businesses.
i2Telecom International provides micro gateway adapters (InternetTalker(TM),EVoIP-4000(TM)), VoIP long distance and other enhanced communication services to subscribers, and its proprietary technology platform is built to the Session Initiation Protocol ("SIP") standard.
Ibasis - The world's largest IP-based Cisco Powered Network (CPN), The iBasis Network provides Voice over IP (VoIP) and Fax over IP (FoIP) quality equaling or exceeding that of Tier One carriers.
IDV - Toll Quality Worldwide SIP Origination and Termination. Great pricing for voip services that really work.
iCallGlobe - iCallglobe provides one of the best voip services offering call termination service; wholesale carrier services; IP Telephony; business solutions; SIP; voip reseller program and many more
ICG Communications (Now Level 3) - ICG Communications, Inc. is a communications provider with a nationwide data and voice network, operating in dozens of major metropolitan areas. As an integrated nationwide and metropolitan fiber optic infrastructure company, ICG provides access and bandwidth to thousands of customers including Internet service providers, interexchange carriers, corporate customers with medium to large-sized businesses, and corporations needing strategic asset protection. Signature products include broadband, dial-up Internet access, Dedicated Internet Access (DIA), and voice and Internet Protocol (IP) solutions.
iConnectHere is the consumer division of deltathree, Inc. deltathree is a leading provider of high-quality, hosted, private-labeled Internet telephony products and services worldwide.
Inet Telecoms Ltd (Voipfone) - Voipfone is a UK based Internet Telephone Service from Inet Telecoms Ltd. Utilising SIP; it provides a complete range of VoIP products and services to both Business and Residential customers.
IPage Telecom - IPage Telecom is a Singapore licensed wholesale SIP Voice Service Provider. We offers International Voice Termination Services Through our Points of Presence in Singapore; Dallas-Texas and Canada.
IPtransit - SIP and H323 provider established 17 tears; specialise in remote satellite connections; callshops; gsm gatweays and calling cards; full web based account interface.
InPhonex, LLC. - FREE VoIP to VoIP calling service.
IntelePeer - IntelePeer SIP Trunking supplies low-cost call origination and termination; long-haul transport; and any-to-any transcoding and mediation for leading telecom carriers and organizations worldwide.
Itinerancia Universal - SIP & IAX / PSTN gateway, IVR service provider in Spain
IP Communications - SIP Origination Services. IP Delivered Toll Free and DID (Local Numbers). IPDID Local Number Service delivers unlimited use U.S. phone numbers from over 43 markets nationwide
IP-Com Sp z.o.o - Residential Users & Business Users. Local Access; SIP; IP-PBX's Call Shops - Internet Cafes Carrier Services - Freephone - DID's - Routes Encrypted SIP calls & Secure VPN 128 Bit AES Voice SIP
IPTELNOW - IPTelnow offers amazing and simple VoIP/SIP plans. No minimum spend and no contract. Join our network and start your IP Phone experience.
ISPhone Australasia Pty Ltd - ISPhone Australasia is a leading provider of Voice-over IP; SIP services and equipment.
iSwitch - Profesional service of development and test of SIP servlet applications in particular; and server side VoIP applications using SIP in general; and the J2ME client when required.
IT-Technology TALK2U - IT-Technology is a R&D company; but also a VoIP (SIP) and fixed network carrier; located in Vienna/Austria
Jive Communications; Inc. - Jive Communications provides a SIP-based PBX phone system and service to end users and resellers
J.M. Field Marketing - here at J.M. Field we have the ability to design; manufacture and deliver any item; whether it is a modification of an existing product or a completely custom piece. We also specialize in SIP.
JS Communications - "(SIP")Licensed 214 and ITXC Carrier providing US and International Termination; Local DID Access Numbers and Toll Free Origination
Kapsch CarrierCom AG is Central Europe's leading independent service provider in the service provider/carrier/corporate networks operator market segment. The products and services offered by Kapsch CarrierCom cover the entire spectrum of modern communication networks, from fixed and mobile telephone and data networks to next-generation broadband communication, internet applications, management software and related services.
KyTEL International Group, Inc. is a global facilities telecommunications provider based in New York City and was founded by Gregory M. Kiley. To date, KyTEL has expanded its global network at an accelerated pace. Its most notable expansion has been the planning, programming and integration of a private global IP backbone using standards based architecture allowing them to easily implement and support emerging technologies such as SIP. With this expansion, KyTEL continues to place itself in the forefront of premier telecommunication providers.
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