March 2006
RFC 4355 : IANA Registration for Enumservices email, fax, mms, ems, and sms - [...] - January 2006
by digitalmonkey"This document registers the Enumservices "email", "fax", "sms", "ems", and "mms" using the URI schemes 'tel:' and 'mailto:' as per the IANA registration process defined in the ENUM specification RFC 3761".
December 2005
1
(2 marks)