SIP Trunking Providers

The deployment of SIP trunks to support your company’s communications needs can help you reduce up to 75% of your current telephony costs. Deploying SIP also opens up new doors to deploy productivity-enhancing Unified Communications. To help you navigate the decision process of picking a trusted SIP provider, Sonus has put together a list of tested partners whom we work with seamlessly. We are confident they will be able to meet your needs. Once you have started your SIP deployment, give Sonus a call to let us help you pick the appropriate SBC to optimize your SIP deployment—855-GO-SONUS.

North America

SIP Trunking Provider Location Phone Inquiries Electronic Inquiries
ANI Networks Las Vegas, Nevada – USA 702-547-8000 Visit Website »
ANPI Springfield, IL – USA 877-366-2674 Visit Website »
AT&T Dallas, TX – USA 877-542-8666 Visit Website »
BT OneVoice Global SIP Trunk London, UK London +44 800 028 5314 Visit Website »
BackBone Communications Los Angeles, CA – USA 800-987-1111 Visit Website »
COEO Solutions Chicago, IL 888-440-4402 Visit Website »
Intelepeer Denver, CO – USA 877-336-9171 Visit Website »
Intermedia Mountain View, CA – USA 800-379-7729 Visit Website »
Iristel Markham, ON – Canada 866-779-4747 Visit Website »
Level(3) Broomfield, CO – USA 617-475-5014 Visit Website »
Nextiva Scottsdale, AZ – USA 800-799-0600 Visit Website »
OneSource Networks Austin, TX – USA 888-228-6000 Visit Website »
Onvoy Plymouth, MN – USA 800-933-1224 Visit Website »
Pure IP San Francisco, CA – USA 415-481-6050 Visit Website »
SDN Communications* Sioux Falls, SD – USA 800-247-1442 Visit Website »
Sprint* Overland Park, KS – USA 888-211-4727 Visit Website »
Tata Communications - US Matawan, NJ – USA 732-888-6700 Visit Website »
Tata Communications - Canada Montreal, Quebec – Canada 514-868-7272  Visit Website »
TelePacific Los Angeles, CA – USA 800-399-4925 Visit Website »
TW Telecom Englewood, CO – USA 800-829-0420 Visit Website »
Velocity Networks Hawthorne, CA – USA 800-626-6515 Visit Website »
Veracity Networks Provo, UT – USA 801-960-1289 Visit Website »
Verizon New York, NY – USA 877-297-7816Visit Website »
Whaleback Portsmouth, NH – USA 603-812-0400 Visit Website »
Wholesale Carrier Services Coral Springs, FL – USA 888-940-5600 Visit Website »
Windstream Little Rock, AR – USA 855-852-9460 Visit Website »
XOHerndon, VA – USA 877-915-8740 Visit Website »



SIP Trunking Provider Location Phone Inquiries Electronic Inquiries
BT OneVoice Global SIP Trunk London, UK London +44 800 028 5314 Visit Website »
Colt London, United Kingdom +44-0-20-7390-3900 Visit Website »
Gamma Telecom Newbury, United Kingdom 0333-014-0000 Visit Website »
IP Sweden Kungsbacka, Sweden 0300-152-40 Visit Website »
Pure IP London, United Kingdom +44-20-3242-0960 Visit Website »
SwissCom Bern, Switzerland +41 62 286 12 12 Visit Website »
TalkTalk Greater London, United Kingdom +44-20-3417-1000 Visit Website »
T-Systems Frankfurt, Germany +49-69-20060-0 Visit Website »



SIP Trunking Provider Location Phone Inquiries Electronic Inquiries
Alestra Nuevo León, Mexico, C.P – Mexico 52-81-8625-2100 C8 Visit Website »
Axtel Nuevo León, Mexico, C.P – Mexico 01-800-2983-500 Visit Website »
BT OneVoice Global SIP Trunk London, UK London +44 800 028 5314 Visit Website »
Maxcom Col. Centro de Ciudad Santa Fe D.F. y Área Metropolitana – Mexico 01-800-6292-662 Visit Website »
RACSASan Jose – Costa Rica 506-2287-0087 Visit Website »



SIP Trunking Provider Location Phone Inquiries Electronic Inquiries
ACMCOM* Australia +61-8-6311-3702  Visit Website »
BT OneVoice Global SIP Trunk London, UK London +44 800 028 5314 Visit Website »
IINET* Australia +61-8-9214-2222 Visit Website »
KVH Japan 81-0-3-4560-7100 Visit Website »
Optus Evolve* Australia 1-800-780-219  Visit Website »
Macquarie Telecom* Australia +800-004-943 Visit Website »
MyNetFone* Australia 1-300-733-995 Visit Website »
Pure IP Singapore / Sydney +61-2-8098-7530 Visit Website »
SBTM Japan 0120-03-0061 Visit Website »
Spark New Zealand New Zealand 123-0800-800-163 Visit Website »
Telekom Malaysia 011-60-3-2241-1290 Visit Website »
Telstra* Australia +1-800-687-829 Visit Website »
Time dotCom Malaysia +60-3-5032-6000 Visit Website »

















  • MathWorks estimates that through the automated provisioning and call routing features of the Sonus solution, the company has freed up more than 250 IT staff hours per week for more important projects.

    MathWorks is the leading developer of mathematical computing software for engineers and scientists. Founded in 1984, MathWorks employs 2800 people in 15 countries, with headquarters in Natick, Massachusetts, U.S.A.
  • The industry-leading performance and scale of Sonus' SBC 5100 allows us to maintain a competitive edge in the market while delivering exceptional customer service. 

    Smart Tel is a major player in the Singapore telecommunications industry and aims to develop its global presence with new offices in Australia, Thailand, Indonesia, Philippines, India, South Africa, the US and the UK, with cost effective, easy-to-use and scalable telephony solutions.
  • We wanted to work with an industry-leading SBC vendor and our market analysis indicated that Sonus was the clear choice for this partnership.

    (GCS) is a software company founded in 2006 by Neal Axelrad and Jay Meranchik. GCS' goal is to be the best company in the marketplace. We are privately held and have offices in New York & New Jersey USA.
  • Sonus made the deployment, integration and migration to Microsoft Lync easy. 

    We are experts in identifying and delivering flexible communication solutions that scale and adapt to your business demands, empowering your business to do more, faster and with less effort and cost.