---
id: "epp-extension"
kind: "glossary-term"
title: "EPP extension"
language: "en"
category: "Transfers and EPP"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/epp-extension/"
translations:
  es: "https://tldlog.com/es/glosario/extension-epp/"
  de: "https://tldlog.com/de/glossar/epp-erweiterung/"
  fr: "https://tldlog.com/fr/glossaire/extension-epp/"
  it: "https://tldlog.com/it/glossario/estensione-epp/"
  pt-BR: "https://tldlog.com/pt/glossario/extensao-epp/"
  ru: "https://tldlog.com/ru/glossariy/rasshirenie-epp/"
  zh-Hans: "https://tldlog.com/zh/cihui/epp-kuozhan/"
---

# EPP extension

An add-on to the EPP protocol that lets registries and registrars exchange data or commands the base standard does not cover, such as DNSSEC keys, launch phases or prices. Many are IETF standards listed in an IANA registry. Registries may also define their own, which a registrar must support only if it sells names in that TLD.

## related terms

- [EPP](https://tldlog.com/glossary/epp/)
- [RGP extension](https://tldlog.com/glossary/rgp-extension/)
- [secDNS extension](https://tldlog.com/glossary/secdns-extension/)
- [launch phase extension](https://tldlog.com/glossary/launch-phase-extension/)
- [fee extension](https://tldlog.com/glossary/fee-extension/)