[top]ITAD Subscriber Numbers

ISN provides an easy way for campuses, enterprises, and service providers to acquire globally-unique and globally-routable subscriber numbers to support new communications services. ISNs are free, fast, and forever yours. ISN is also protocol neutral and may be used to support SIP, XMPP, H.323 or other communications.

An ISN is formed by joining a domain-local subscriber number to an ITAD (Internet Telephony Administrative Domain) number, using an asterisk as the delimiter. For example, subscriber 1234 in ITAD 256 would have ISN: 1234*256.

Think of an ISN as an Internet-style phone number, where the asterisk is analogous to the @ sign in an email address.

See the ISN Trial Home Page for more information.