Code specifying the type of communication address.
Code
Description
AA
Circuit switching
A process that, on demand, connects two or more data terminal equipments and permits the exclusive use of a data circuit between them until the connection is released (ISO).
AB
SITA
Communications number assigned by Societe Internationale de Telecommunications Aeronautiques (SITA).
AC
ARINC
Communications number assigned by Aeronautical Radio Inc.
U.S. Defense Switched Network
The switched telecommunications network of the United States Department of Defense.
AG
U.S. federal telecommunications system
The switched telecommunications network of the United States government.
AH
World Wide Web
Data exchange via the World Wide Web.
AI
International calling country code
Identifies that portion of an international telephone number representing the country code to be used when calling internationally.
AJ
Alternate telephone
Identifies the alternate telephone number.
