New Specification by ATIS and SIP Forum Advances Network Capabilities to Mitigate Unwanted Robocalling and Caller ID Fraud

WASHINGTON and NORTH ANDOVER, Mass. — Feb. 2, 2017 —  ATIS and the SIP Forum are pleased to announce publication of the SHAKEN (Signature-based Handling of Asserted information using toKENs) specification, a major advancement in industry efforts to mitigate unwanted robocalls and caller ID spoofing.

Developed to efficiently implement the IETF’s STIR (Secure Telephony Identity Revisited) standard, SHAKEN defines a signature to verify the calling number and specifies how it will be transported in SIP “on the wire.”  The SHAKEN framework provides guidance for service providers to implement STIR.  Together, STIR/SHAKEN will offer a practical mechanism to provide verified information about the calling party as well as the origin of the call — what is known as “attestation” — for the first time in the network. Giving service providers the tools needed to sign and verify calling numbers makes it possible for consumers to know, before answering, that the calls they receive are from legitimate parties.

“Today’s solutions for blocking unwanted calls depend on caller ID, which can be easily spoofed leaving consumers inherently vulnerable. STIR/SHAKEN verifies calling party information, creating a solid foundation for existing and future call-blocking applications,” said ATIS President and CEO Susan Miller. “Unwanted robocalling is the FCC’s leading cause of consumer complaints. This ATIS specification not only mitigates the problem but also assists law enforcement in finding the source of unwanted calls. ATIS is pleased to have developed this solution with the SIP Forum giving consumers more control over the calls and texts they receive.”

“The SIP Forum is delighted to work with ATIS on advancing this technology. Not only are robocalls the leading cause of consumer complaints in the United States, but they are also the number one consumer complaint in the United Kingdom and Canada. We jointly hope to see this solution adopted internationally,” said Richard Shockey, Chairman of the Board of the SIP Forum.  “And we will not stop here. The SIP Forum will continue to work closely with ATIS in the weeks and months ahead on advancing the state of the art and work with the industry-led Strikeforce on Robocalls and appropriate national regulatory authorities. ”

To obtain a copy of the SHAKEN Specification, please visit the ATIS White Paper Center here: or the SIP Forum website here:

To speed deployment of the new specification, carriers will be validating its effectiveness through the ATIS Robocalling Testbed:


About ATIS

As a leading technology and solutions development organization, the Alliance for Telecommunications Industry Solutions (ATIS) brings together the top global ICT companies to advance the industry’s most critical business priorities. ATIS’ 150 member companies are currently working to address 5G, the all-IP transition, network functions virtualization, big data analytics, cloud services, the ICT implications of Smart Cities, emergency services, IoT, cyber security, network evolution, quality of service, billing support, operations, and much more. These priorities follow a fast-track development lifecycle – from design and innovation through standards, specifications, requirements, business use cases, software toolkits, open source solutions, and interoperability testing.

ATIS is accredited by the American National Standards Institute (ANSI). ATIS is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of the oneM2M global initiative, a member of the International Telecommunication Union (ITU), as well as a member of the Inter-American Telecommunication Commission (CITEL). For more information, visit

About SIP Forum

The SIP Forum is an IP communications industry association that engages in numerous activities that promote and advance SIP-based technology, such as the development of industry recommendations, the SIPit, SIPconnect-IT and RTCWeb-it interoperability testing events, special workshops, educational seminars, and general promotion of SIP in the industry. The SIP Forum is also the producer of the annual SIPNOC conferences (for SIP Network Operators Conference), focused on the technical requirements of the service provider community. One of its notable technical activities is the development of the SIPconnect Technical Recommendation – a standards-based SIP trunking recommendation that provides detailed guidelines for direct IP peering and interoperability between IP PBXs and SIP-based service provider networks. Other important Forum initiatives include work in Fax-over-IP interoperability, User Agent Configuration, Video Relay Service interoperability, security, NNI, and SIP and IPv6. For more information, please visit:

About Neustar

Every day, the world generates roughly 2.5 quadrillion bits of data. Neustar (NYSE: NSR) isolates certain elements and analyzes, simplifies and edits them to make precise and valuable decisions that drive results. As one of the few companies capable of knowing with certainty who is on the other end of every interaction, we're trusted by the world's great brands to make critical decisions some 20 billion times a day. We help marketers send timely and relevant messages to the right people. Because we can authoritatively tell a client exactly who is calling or connecting with them, we make critical real-time responses possible. And the same comprehensive information that enables our clients to direct and manage orders also stops attackers. We know when someone isn't who they claim to be, which helps stop fraud and denial of service before they're a problem. Because we're also an experienced manager of some of the world's most complex databases, we help clients control their online identity, registering and protecting their domain name, and routing traffic to the correct network address. By linking the most essential information with the people who depend on it, we provide more than 12,000 clients worldwide with decisions—not just data. More information is available at