Provider certification record

Communication Dynamics Ltd

Listed

Identity

Legal business name: Communication Dynamics Ltd
Doing-business-as
Foreign Voice Service Provider: Yes
Business address: 45 Albemarle Street, W1S 4JL London, United Kingdom, United Kingdom
Filing contact: Daniel Worman
Founder · Exec
dw@cdyn.io
+44 20 3566 9990
45 Albemarle Street W1S 4JL London, United Kingdom, United Kingdom
United Kingdom
Principals, Affiliates, Subsidiaries, and Parent Companies: Worman Holdings Ltd

Provider role(s): Voice service provider
STIR/SHAKEN implementation: Role Implementation
Voice service provider None
Overall None
Exemption rules: The filer claims the exemption recognized by the FCC for providers that "lack control over the network infrastructure necessary to implement STIR/SHAKEN" (First Caller ID Authentication Report and Order, 35 FCC Rcd 3241, 3260, para. 40; and subsequently affirmed in the Sixth Report and Order, FCC 23-18). The filer operates as a non-facilities-based service provider and does not own, manage, or operate the telecommunications network infrastructure (such as softswitches, Session Border Controllers, or SIP signaling platforms) required to cryptographically sign calls with STIR/SHAKEN certificates. The filer utilizes a third-party, facilities-based upstream underlying carrier (DIDWW) for all network routing and SIP signaling. Because the filer lacks control over the physical and logical network facilities where STIR/SHAKEN call authentication occurs, it is technically incapable of implementing the framework directly. Instead, the filer relies entirely on its upstream provider (DIDWW) to properly authenticate and sign the calls originating from the filer's customers before the traffic enters the U.S. PSTN.

Role	Implementation
Voice service provider	None
Overall	None

Date	Event	Detail / diff
2026-03-20	New	Initial certification filed and added to database.