A Name Authority Pointer (NAPTR) record is commonly used in internet telephony. It allows servers and user addresses to be mapped in the SIP (Session Initiation Protocol). In laypeople's terms, a NAPTR record helps set dynamic rules for how a website processes requests.
NAPTR records map E.164 numbers to a URI or an IP address. Essentially, an E.164 number is a telephone number. In addition, these telephone numbers contain a country code and a destination number. Hence, the NAPTR record will resolve these phone numbers to a URI or IP address allowing users to reach telephone devices over the internet.
A typical NAPTR record is illustrated below:
Its core record properties are explained below.
You can do the following to perform a NAPTR record lookup for a given domain.
Adding a NAPTR record can differ based on your DNS provider. For example, if you were using Route53, you can add a NAPTR record by:
No, including the NAPTR record in your DNS file is not mandatory. However, if your application belongs to the telecommunication sector or is involved in internet telephony, it is recommended to use a NAPTR record.
A PTR (Pointer Record) is used for Reversed DNS Resolution (where it uses an IP address to find the domain it is associated with). At the same time, a NAPTR record is responsible for resolving an E.164 telephone number to an IP address or URI.
Yes, NAPTR records are still being used for applications based on internet telephony.
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