Provider certification record

Citizens Telephone Company

Listed

Identity

Legal business name: Citizens Telephone Company
Doing-business-as: Comporium
Foreign Voice Service Provider: No
Business address: 330 East Black Street, Rock Hill SC 29730
Filing contact: Rodger Culbreath
Director & Professional Engineer · Network Facilities
rodger.culbreath@comporium.com
(803) 326-7128
471-A Lakeshore Pkwy Rock Hill SC 29730
United States of America
Principals, Affiliates, Subsidiaries, and Parent Companies: The Citizens Telephone Company response to Principals, Affiliates, Subsidiaries, and Parent Companies is located within the RMP on page 3.

Provider role(s): Voice service provider
STIR/SHAKEN implementation: Role Implementation
Voice service provider Partial
Overall Partial
Exemption rules: Citizens Telephone Company is eligible for the continuing extension of the STIR SHAKEN implementation deadline as a small voice service provider (§64.6304 (a)(2) that has non-IP portions within its network §64.6304(d). The majority of customers are served on the non-IP portions of the network which relies on technology that cannot initiate, maintain, carry, process, and terminate SIP calls. The company has implemented STIR|SHAKEN within its IP network and signs the calls originating on the IP portions of the company's network. To meet the non-IP network criteria for the continuing STIR/SHAKEN extension (§64.6303 (a)(2)), Comporium (inclusive of its affiliates and subsidiaries) is a member of NTCA. NTCA participates on the ATIS PTSC Non-IP Call Authentication Task Force working group which developed the (ATIS Solution) non-IP call authentication solutions. NTCA is serving as Comporium's third-party representative on the ATIS PTSC Non-IP Call Authentication Task Force working group.

Role	Implementation
Voice service provider	Partial
Overall	Partial

Date	Event	Detail / diff
2026-02-13	New	Initial certification filed and added to database.