PROPHONIX.COM Phonix Communications Operating, LLC (under license from Standard 1979 Holdings, LLC) — Carrier-Grade Wholesale Voice, SIP Routing & Telecom Infrastructure

Carrier STIR/SHAKEN, E911 & Robocall Mitigation Compliance Notice

Effective Date: November 12, 2026

Phonix Communications Operating, LLC enforces mandatory STIR/SHAKEN cryptographic signing (ATIS-1000074), SIP Response Code 607/608 analytics filtering, and NENA i3 E911 PIDF-LO routing across all prophonix carrier trunks.