tools
Free, client-side utilities for the telecom trust & identity beat — useful for developers validating real traffic, and built to teach the concepts to anyone new to them.
PASSporT & Identity Header Decoder
jwt.io-style decoding of STIR/SHAKEN, RCD, and diversion (div) PASSporTs and the SIP Identity header — decode one or more chained headers (diversion), see the JSON, defect checks, and a plain-language field guide with worked examples.
STI Certificate & TNAuthList Decoder
Decode a STIR/SHAKEN certificate and interpret its TNAuthList — an SPC (4-char OCN or 5-char RespOrg ID) for provider certs, or a TN / range for delegate certs (RFC 9060). Accepts PEM, x5c, or x5u.
Carrier Lookup
Resolve a US carrier by FRN, OCN, or company name across the FCC Robocall Mitigation Database and Form 499 Filer Database — STIR/SHAKEN status, roles, legal entity, communications type, service jurisdictions, and OCNs in one view, both directions.
STI-CA Trust List & Chain Validator
Validate a STIR/SHAKEN certificate chain to a trusted STI-PA root and check revocation against the public CRL — and browse the approved STIR/SHAKEN Certification Authorities and the trusted roots they anchor.