What is the maximum length of any numeric geographic area address in ITU recommendation E.164?
A.
15
B.
18
C.
21
D.
22
E.
25
Explanation:
E.164 defines a general format for international telephone numbers. Plan-conforming numbers are
limited to a maximum of 15 digits. The presentation of numbers is usually prefixed with the
character + (plus sign), indicating that the number includes the international country calling code
(country code), and must typically be prefixed when dialing with the appropriate international call
prefix, which is a trunk code to reach an international circuit from within the country of call
origination.