Related articles:
9-1-1
Telephone numbering plan
Area code 360
List of country calling codes
Public switched telephone network
Toll-free telephone number
555 (telephone number)
Emergency telephone number
Puerto Rico
United States
Guam
Key terms:
calls
area code
dialing
telephone
nanp
digits
xxxx
prefix
overlays
telephone number
nanpa
caller
local calls
phone numbers
pagers
nashua
mobile phone
landline
nuisance
new area code
long distance
allocations
middle digit
second digit
npa code
cellular phones
toll alerting
toll calls
direct dialing
north american numbering plan
portability
puerto rico
geographical area
dominican republic
telephone users
all local calls
directory assistance
telephone exchange
alphabetic dialing
permissive dialing
telephone companies
splits and overlays
area code splitting
emergency telephone number
vertical service code
fictional telephone numbers
public switched telephone network
american numbering plan area codes
north american numbering plan area
north american numbering plan administration
Search external links cited by footnotes on Wikipedia page North American Numbering Plan:
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