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Note: The following is an excerpt from the official Ethereum site. It is provided here as a convenience and is not authoritative. Refer to the original document as the authoritative reference.

This EIP specifies a TLD, registrar, and resolver interface for reverse resolution of Ethereum addresses using ENS. This permits associating a human-readable name with any Ethereum blockchain address. Resolvers can be certain that the reverse record was published by the owner of the Ethereum address in question.

While name services are mostly used for forward resolution - going from human-readable identifiers to machine-readable ones - there are many use-cases in which reverse resolution is useful as well:

1. Applications that allow users to monitor accounts benefit from showing the name of an account instead of its address, even if it was originally added by address.

2. Attaching metadata such as descriptive information to an address allows retrieving this information regardless of how the address was originally discovered.

3. Anyone can configure a name to resolve to an address, regardless of ownership of that address. Reverse records allow the owner of an address to claim a name as authoritative for that address.