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How many types of RSPs are there?

There are four types of RSPs:

  1. Main RSPs, which operate the registration database for a gTLD, undertake escrow of domain registration data, and operate the Extensible Provisioning Protocol and Registry Data Access Protocol services for a gTLD. A gTLD can only have one Main RSP.
  2. DNS RSPs, which operate one or more DNS servers for a gTLD. A gTLD may use multiple DNS RSPs.
  3. DNSSEC RSPs, which undertake the cryptographic operations necessary for DNS Security Extensions (DNSSEC). A gTLD's DNSSEC RSP may also be its Main RSP or one of its DNS RSPs.
  4. Proxy RSPs, which perform registration validation to comply with applicable local law in a given jurisdiction. Note that this is an optional registry service that must be approved by ICANN. A gTLD may use multiple Proxy RSPs, each of which provides access to a different jurisdiction.
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