Related terms:
nanp
xxxx
nanpa
dialing
caller
calls
overlay
prefix
digits
reserved
numbering
local calls
list
area code
country code
telephone
long distance
manhattan
telephone number
illinois
telephone numbers
mobile phone
puerto rico
directory assistance
czech republic
dominican republic
north american numbering plan area
new york
Wikipedia sources:
North American Numbering Plan
List of country calling codes
Area code 917
Area code 312
Area code 212
Area code 202
555 (telephone number)
Telephone numbering plan
Area codes 630 and 331
Context for words:
north
american
numbering
plan
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