Current Numbering (North America)
Major changes to U.S. local calling:
If you currently dial just 7 digits for a local call, that may be
changing soon. Details of
“ The Big 10D”
(coming in 2021–2022): will you be changing
to 10‑digit local calls?
for 2021 (selected for use by the U.S. State Department!)
of area codes and time zones
New area codes,
showing the dates, cities, and test numbers
Planned Area Codes Not Yet in Service
(similar to NANPA’s “Planned NPAs Not Yet in Service”
page, only with accurate and up-to-date information),
of upcoming new area code assignments that have not yet
been officially announced, updated
Cities and area codes, up to date and accurate,
now with time zones!
(Listed by state / province / country / territory),
The listings are now divided as follows.
2022-01-13 US States:
Other NANP locations
and nearby non-NANP country codes
By area code:
Area Code Locator guide —
Now with Time Zones!
— area codes listed numerically with major cities,
con husos horarios,
Localizador de Códigos de Área,
2022-01-14 (indicativos regionales,
claves LADA de EE.UU. y de Canadá)
avec fuseaux horaires,
Localisateur des Indicatifs Régionaux,
mise à jour
codes (toll-free, information services, etc.)
in North America, updated
overlay area codes,
Nueva numeración en
new numbering in
en 2019 •
Mexico in 2019
[español • English]
Những thay đổi lớn đối với số điện thoại tại
trong năm 2017 và 2018
Major changes to telephone numbers in
Vietnam in 2017 and 2018
Changements majeurs à la numérotation téléphonique
en 2017 et 2018
[vi=Tiếng Việt • en=English • fr=français]
Telephone and Internet Country Codes
in 10 Languages
Telephone and Internet Country Codes, specially formatted for
International telephone and Internet
updated 2022-01-04 —
optimized for Google Translate
Map and comprehensive multilingual listing of telephone country codes,
city codes, Internet country codes, and time zones for
Major changes/changements majeures in
(details in English & français)
Almost all fixed (landline) telephone numbers in
(+253) in 2019
(details in English & Shona)
overhauled its telephone numbering in 2010.
GH Ghana Details in English, français & Hausa, updated
Table of information about area codes in the
and other nearby regions, updated
Map of Caribbean
area codes •
New map with time zones,
History and Evolution
When did that area code (NPA) begin?
List of NPA in-service dates,
numerically by area code or
chronologically by effective date,
Table of the
original 86 area codes from 1947
Map of the original 86
Bellcore area code map,
Map of area codes from the most stable period, the
map updated 2021-08-27
Table of the
of the original area codes to their present form, updated
(used for phone sex, telesleaze, etc.)
— numbers to watch out for on your phone bill,
or block from your PBX!
(provided without warranty), updated
(Note: this list is not being kept up to date)
Moderately Recent Events
of all area code splits from 1980 to present.
(Got an old number and don’t know the new area code? Try this listing!)
(Note: there have been no splits since 2007.)
— listing of splits begun from
Editorial commentary and explanatory notes
about the area code split/overlay table, updated
(Preserved for historical amusement)
Other Information & Fun Stuff
for area codes that are filling up,
of North American numbering,
for future expansion
“Why not just go to
8-digit local numbers now?”
(a frequently asked question)
“Why do we need
new area codes?”
Just for fun —
for area codes
(for example, 859 = UKY for the University of Kentucky)
article about me
from the New York Times
An article I wrote about
Local Number Portability
and Number Conservation issues
Proposal regarding area code relief in the 714 and 949 NPAs in
Excerpts from the
related to telephone numbering administration.
(Due to substantial changes, the excerpts have been
replaced with links to the official texts.)
This site contains information about the
North American Numbering Plan,
the telephone numbering scheme that serves the United States, Canada,
and several other countries and territories in the region.
The NANP divides the participating countries into area codes, each of which
is a three-digit number. Within each area code, a telephone number is always
7 digits, except for special codes like the 911 emergency number.
In the late 1990s, the NANP added new area codes at a rate unprecedented in
its 50-year history, with demand fueled primarily by the outdated system of
allocating blocks of numbers to telephone companies.
More efficient allocation methods, coupled with consolidation in the
telecommunications industry, have slowed the flood of new area codes to
barely a trickle, from 45 in 1997 to only 3 in 2007.
Notably, the introduction of new area codes has shifted decisively from
traditional area code splits to overlays. As of mid-2013, there are no
area code splits pending or planned anywhere in the NANP!
This site contains information about the original area codes from 1947,
their evolution to the current state, and future developments, including
area code splits and area code overlays.
The site underwent a major overhaul in early 2021. Most of the
changes are “under the hood” (full HTML5 compliance and much
greater use of Unicode instead of ASCII भ escapes),
but several of the graphics have been updated, particularly with
an eye to making them more friendly to people with Color Vision
Deficiency (“color blindness”), and the logo has been refreshed.
Most of the changes are complete, but a few laggards will be
brought into the 21st century in the coming weeks.
The Unicode came in particularly handy for the
page, which now contains text in over 200 languages in three dozen
character sets. I’m phasing in SVG graphics to replace many of the
older PNG/GIF graphics, providing dramatically better quality at
arbitrary scales. I continue to closely monitor US and Canadian
regulators’ websites for any updates, and keep my ear to the ground
for any credible rumors from other sources. I also receive regular
updates from the ITU on international numbering. I hope you find
the information here useful for all your telephony needs.
The correct address of this page is
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