---

---

In General term ENUM is simply the convergence of Public Switched Telephone Networks (PSTN) to Internet Protocol (IP) Networks – in other words, the mapping of telephone numbers to domain names using a Domain Name System (DNS)-based architecture. ENUM helps to facilitate such services as Voice over IP (VoIP), and allows network elements to find services on the Internet using only a telephone number. ENUM is also the title of RFC 3761, the approved protocol document that discusses the use of DNS for the storage of E.164 numbers and the available services connected to an E.164 number.

---

Posted by HamidAliKhan

The Internet Assigned Numbers Authority (IANA) has populated the domain e.164.arpa to point to portability services that have been reported to it. For instance, if Brazil (with a country code of 55 were to build a number portability service on the Internet, they could send the IANA the link to that service. Then any Enum number ending in 55.e164.arpa would be referred to their service.

---

Posted by crouse

Enumeration allows the Domain Name System to store E.164 formatted telephone numbers. The Internet Assigned Numbers Authority (IANA) has populated the domain e.164.arpa to point to portability services that have been reported to it. For instance, if Brazil (with a country code of 55 were to build a number portability service on the Internet, they could send the IANA the link to that service. Then any Enum number ending in 55.e164.arpa would be referred to their service.

---

Posted by george99

---

Posted by snjysanjay05

What is ENUM?

ENUM is simply the convergence of Public Switched Telephone Networks (PSTN) to Internet Protocol (IP) Networks – in other words, the mapping of telephone numbers to domain names using a Domain Name System (DNS)-based architecture. ENUM helps to facilitate such services as Voice over IP (VoIP), and allows network elements to find services on the Internet using only a telephone number. ENUM is also the title of RFC 3761, the approved protocol document that discusses the use of DNS for the storage of E.164 numbers and the available services connected to an E.164 number.

What is E.164?

E.164 is an existing global numbering system, and is therefore appropriate for use by ENUM

---

Posted by sagitraz