NAPTR record

A NAPTR (Naming Authority Pointer) record is a type of DNS record that is used to map one domain name to another domain name or information about a service available on a domain. NAPTR records are commonly used in the context of ENUM (telephone number mapping) to facilitate the translation of telephone numbers into domain names for the purpose of routing VoIP (Voice over Internet Protocol) calls.

NAPTR records contain various fields that specify the order in which rules should be applied to resolve the domain name, as well as flags that indicate the type of service being referenced. These records can also include regular expressions that allow for complex transformations of domain names.