Terminology

The following lists explains the terminology used later.

X is any digit having the value 0 through 9
N is any digit having the value 2 through 9
0/1 is a digit having the value of either 0 or 1
NXX is a form of Numbering Plan Area (NPA).
CC is a 1, 2, or 3 digit country code used in international dialing
NN is a national number that can be a four to fourteen digit national number used in international dialing, where the combination of CC+NN is a 7 to 15 digit number.
+ symbol in E.164 indicates that an international prefix is required
E.164 numbers are globally unique, language independent identifiers for resources on Public Telecommunication Networks that can support many different services and protocols.
N11 number is any of the three-digit dialing codes in the form N11 used to connect users to special services, where N is a digit between 2 and 9