Metaswitch QCall
Metaswitch QCall is the first vendor-delivered implementation of STIR/SHAKEN to a US Tier 1 service provider. QCall in Call Guardian Authentication Hub provides a complete scalable, in-network and hosted robocalling solution. Metaswitch is a Microsoft company.

Website: metaswitch.com

Phone: +1 415 513-1500

Email: sti-ca@metaswitch.com

NetNumber, Inc.
NetNumber delivers core-network signaling solutions that power global telecom and enterprise networks. Our software-based TITAN signaling-control platform and cloud-services accelerate delivery of 3G, 4G and 5G services including STIR/SHAKEN.

Website:  netnumber.com

Phone: 978-848-2820

Email: sales@netnumber.com

Neustar
Neustar Certification Authority services, available via our leading Certified Caller STIR/SHAKEN  service provider solution. We are a pioneer in call authentication, co-author of STIR standards, contributor to SHAKEN framework & exclusive host of ATIS Robocalling Testbed.

Website: home.neustar/caller-intelligence/certified-caller

Phone: +1 (855) 898-0036

Email: callerid@team.neustar

Sansay, inc.
Sansay offers the highest performance STIR/SHAKEN solutions complete with Certificate Authority and Database. Free evaluations for Service Providers with or without Sansay SBC's can be deployed in 2 hours or less. STIR/SHAKEN is included for Sansay SBC maintenance customers.

Website: www.sansay.com

Phone: +1 858-754-2200

Email: sales@sansay.com

TransNexus
TransNexus is ready to provide SHAKEN certificate services quickly, easily, and at low cost. Our services are built for high security, availability and reliability. These services offer a variety of integration options.

Website: transnexus.com/sti-ca/

Phone:+1(404) 526-6060

Email: ca@transnexus.com