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EPP

The standard protocol registrars use to register and manage domains with a registry.

FBFenwei BianAuthorVZVictor ZhouEditorJune 22, 2026
  • glossary

EPP (Extensible Provisioning Protocol) is the XML-based command protocol defined in RFC 5730 that governs how a registrar communicates with a registry to create, update, transfer, or delete domain registrations. Every time a registrar registers a new name, renews it, or initiates a transfer, it sends an EPP command over a secure TCP session to the registry's EPP server and receives a structured response confirming success or reporting an error. The protocol also carries the auth-code used to authorize outbound transfers and surfaces the EPP status codes — such as clientTransferProhibited or serverHold — that describe a domain's current state. Because EPP is tightly controlled, access is limited to accredited registrars; end users never interact with it directly.

Related keywords

  • Extensible Provisioning Protocol
  • domain management
  • registry protocol
  • RFC 5730
  • EPP
  • what is EPP
  • EPP meaning
  • EPP definition

Contributors

Fenwei Bian

Software Developer & Writer • Namefi
Author

Fenwei Bian is a software developer in her thirties who spends her working hours in pull requests and her weekends with her hands in soil or sawdust. Years of open source on GitHub taught her that names are interfaces: a good one is clear, honest about what it does, and kind to whoever has to use it next.

She gardens because it rewards patience and punishes wishful thinking, and she does woodwork because a joint either fits or it doesn't. Both habits show up in how she writes about naming — measure twice, check the source, and don't sand over a rough spot and hope no one notices.

For Namefi she writes about how domain markets actually move, the practical trade-offs of tokenizing and flipping names, and picking a domain you'll still be glad you own in twenty years.

GitHub

Victor Zhou

Founder & Standards Editor • Namefi
Editor

Victor Zhou is a technology founder and standards editor focused on digital identity and trust. He founded Namefi, edits Ethereum Improvement Proposals, and previously led smart-contract architecture work at Google Labs.

His work sits at the intersection of naming, ownership, and the systems people use to establish identity online. That perspective makes him especially interested in the way names move between personal meaning, public recognition, and digital infrastructure.

For Namefi, Victor edits and writes about domains as durable digital identity: how names become ownable onchain assets, how tokenization changes custody and trust, and what naming can learn from the systems people use to establish identity online.

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