PHILADELPHIA, Penn. -- A group of technology companies and voice service providers today announced a key milestone in protecting consumers from fraudulent robocalls, and building a more secure and trustworthy telephone ecosystem. Comcast, Everbridge, NetNumber, Numeracle, and Twilio completed what is believed to be the first ever call to combine authenticated caller ID and Rich Call Data (RCD), powered by the STIR/SHAKEN framework and protocols.

Enhancing authenticated caller ID as an extension of STIR/SHAKEN, Rich Call Data is an evolutionary leap forward for trust in the phone ecosystem. Using public key cryptography and the global STIR/SHAKEN family of protocols, Rich Call Data allows legitimate callers to tell recipients exactly who they are, where they’re calling from, and even why they are calling, with the highest degree of trust and certainty. This technology is particularly important for enterprise callers, who need reliable tools to reach their customers.

The history-making call was completed on Comcast’s voice network using a suite of interoperable technologies and networks from Everbridge, NetNumber, Numeracle, and Twilio.

“With this milestone, we’re beginning to tap into the full power of STIR/SHAKEN to protect consumers and further increase trust in the global telephone ecosystem,” said Chris Wendt, Director of Technical Research and Development, IP Communications Services, Comcast Cable. “While call authentication is powerful by itself, the ability to deliver Rich Call Data to recipients has the potential to create a level of trust and visibility that was never before possible.”

Enterprise callers, contact centers, and their telephone services technology providers use a complex set of call-initiation and routing relationships to deliver calls to customers and consumers. Everbridge, a communications service provider supporting critical event calls and notifications for emergency scenarios – calls that need to be answered – was selected as a demonstration of the power of delivering authenticated enhanced caller identification in this proof of concept. The ability for enterprises to provide Rich Call Data associated with calls they control is a recent addition to the STIR/SHAKEN family of call authentication specifications.

“The Rich Call Data enhancements demonstrated here are key to providing consumers a trusted experience while ensuring that essential calls will reach the intended recipients and that citizens will be reliably notified,” said Dr. Eric Golin, Chief Architectural Officer for Everbridge, the global leader in critical event management. “In an emergency such as a wildfire or hurricane, for example, people must have the confidence to answer an incoming call from local authorities to receive potentially life-saving instructions.”

To begin the end-to-end caller ID authentication, Everbridge and its enterprise clients first completed the Numeracle Verified Identity™ entity vetting and validation process. Verified Identity provides a compliance-based, know your customer (KYC) and customer due diligence solution used to validate the business identity and calling competency in support of the TRACED Act’s goal of ensuring the calling party is accurately identified.

Utilizing Numeracle’s Entity Identity Management™ platform, the relationship between the Everbridge Verified Identity enterprise, its authorized phone numbers, and its active relationship with outbound VoIP Service Provider, Twilio, was validated and certified. Branded Rich Call Data was associated with the Numeracle-validated enterprise call profile and pushed to the NetNumber Guaranteed Caller™ platform for issuance of a SHAKEN delegate certificate, and for use in call signing via Twilio as the originating service provider (OSP).

“Twilio eagerly participated in one of the first end-to-end caller ID authentications that successfully transmitted Branded Rich Call Data signed by a delegate certificate within the Public Switched Telephone Network,” said Jesper Joergensen, General Manager of Voice and Video for Twilio. “Since the ratification of the STIR/SHAKEN standard, Twilio has recognized the importance of KYC and authenticating direct and indirect customers in order to restore trust between businesses and consumers.”

Based on the receipt of the RCD signed call, Twilio was then able to confidentially and reliably sign the call with a SHAKEN signature using A-Level Attestation, the highest level of verification. Comcast then demonstrated the receipt and verification the RCD and STIR/SHAKEN signed call with the display of the Verified Identity of the Everbridge enterprise caller via Caller ID Name, brand logo, and call reason.

“We thank Comcast for understanding and investing in the challenges of STIR/SHAKEN enterprise call delivery through its active leadership role in the standards and development of the delegate certificate model,” said Rebekah Johnson, Founder and CEO, Numeracle. “The proof of concept we demonstrated here, through the participation of NetNumber, Everbridge, and Twilio, proves the collaborative ability to bridge the gap between the enterprise caller and the point of entry to STIR/SHAKEN call authentication so critical, legal, and wanted calls can be delivered without interruption to the consumer.”

Doug Ranalli, Founder and VP Products & Strategy - GDS, NetNumber added, “Beyond anything else, this proof of concept demonstrates the level of collaboration and cooperation needed across telecommunications providers to deliver end-to-end trust from enterprise to consumer across a full ecosystem of technology providers. By leveraging standards and supporting KYC requirements for service providers, we have actively employed technology to support legal callers and deny bad actors entry to the trust network.”

For more information on the FCC’s Caller ID Authentication requirements, visit

About Comcast

Comcast Corporation (Nasdaq: CMCSA) is a global media and technology company with three primary businesses: Comcast Cable, NBCUniversal, and Sky. Comcast Cable is one of the United States’ largest high-speed internet, video, and phone providers to residential customers under the Xfinity brand, and also provides these services to businesses. It also provides wireless and security and automation services to residential customers under the Xfinity brand. NBCUniversal is global and operates news, entertainment and sports cable networks, the NBC and Telemundo broadcast networks, television production operations, television station groups, Universal Pictures, and Universal Parks and Resorts. Sky is one of Europe's leading media and entertainment companies, connecting customers to a broad range of video content through its pay television services. It also provides communications services, including residential high-speed internet, phone, and wireless services. Sky operates the Sky News broadcast network and sports and entertainment networks, produces original content, and has exclusive content rights. Visit for more information.

About Everbridge

Everbridge, Inc. (NASDAQ: EVBG) is a global software company that provides enterprise software applications that automate and accelerate organizations’ operational response to critical events in order to Keep People Safe and Businesses Running™. During public safety threats such as active shooter situations, terrorist attacks or severe weather conditions, as well as critical business events including IT outages, cyber-attacks or other incidents such as product recalls or supply-chain interruptions, over 5,400 global customers rely on the Company’s Critical Event Management Platform to quickly and reliably aggregate and assess threat data, locate people at risk and responders able to assist, automate the execution of pre-defined communications processes through the secure delivery to over 100 different communication devices, and track progress on executing response plans. Everbridge serves 8 of the 10 largest U.S. cities, 9 of the 10 largest U.S.-based investment banks, 47 of the 50 busiest North American airports, 9 of the 10 largest global consulting firms, 8 of the 10 largest global automakers, 9 of the 10 largest U.S.-based health care providers, and 7 of the 10 largest technology companies in the world. Everbridge is based in Boston with additional offices in 14 cities around the globe. For more information visit

About NetNumber

NetNumber, Inc. brings over 20 years of experience delivering core network signaling control platforms that power global telecom and enterprise networks. Our software-based signaling-control solutions accelerate delivery of new services like Private Networks and IoT/M2M solutions across multi-gen networks, dramatically simplifying the core and reducing OPEX. These solutions span a range of network types from 2G-3G-4G-5G to future G delivered on the industry's most robust signaling platforms, TITAN and TITAN.IUM. NetNumber Data Services are essential for global inter-carrier routing, roaming, voice and messaging. Data powers fraud detection and prevention solutions and enables enterprise B2B and B2C communications platforms. NetNumber multi-protocol signaling firewall, fraud-detection, and robocalling solutions help secure networks against current/emerging threats.

About Numeracle

Numeracle’s Entity Identity Management™ and Verified Identity™ platform enables legal entities to prevent improper call blocking and labeling and prepare for enterprise call delivery with STIR/SHAKEN. By working with technology providers, carriers, device manufacturers, analytics companies, and others, Numeracle provides visibility and management across the major stakeholders who have an effect on the way communications are presented to consumers to give legal call originators control over their brand's presentation. To learn more, visit

About Twilio

Millions of developers around the world have used Twilio to unlock the magic of communications to improve any human experience. Twilio has democratized communications channels like voice, text, chat, video, and email by virtualizing the world’s communications infrastructure through APIs that are simple enough for any developer to use, yet robust enough to power the world’s most demanding applications. By making communications a part of every software developer’s toolkit, Twilio is enabling innovators across every industry — from emerging leaders to the world’s largest organizations — to reinvent how companies engage with their customers.

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