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.