Facts about the world's numbering plans

Computed from the 245 plans on file, not typed by hand; each figure has its table in the legend. The source for all of them is the ITU's register of national numbering plans and each plan itself.

Plans per world zone

The first digit of a country code is its ITU zone. Zone 2, Africa, has the most plans; zone 7 is two countries.

Territories per zone

1 North America and the Caribbean	25
2 Africa	64
3 Europe	36
4 Europe	16
5 Central and South America	31
6 Oceania and South-East Asia	30
7 Russia and Kazakhstan	2
8 East Asia and special services	11
9 West, Central and South Asia	30

territories with a numbering plan on file

Country codes shared by several territories

+1 serves 25 territories, each with its own area codes; from one to another the call is dialled like a national one.

Territories per shared code

+1 (United States)	25
+44 (United Kingdom)	4
+61 (Australia)	3
+590 (Guadeloupe)	3
+7 (Russia)	2
+39 (Italy)	2
+47 (Norway)	2
+212 (Morocco)	2
+262 (Réunion)	2
+290 (St. Helena)	2
+358 (Finland)	2
+599 (Curaçao)	2

territories sharing the code

Who shares what

+1: American Samoa, Anguilla, Antigua & Barbuda, Bahamas, Barbados, Bermuda, British Virgin Islands, Canada, Cayman Islands, Dominica, Dominican Republic, Grenada, Guam, Jamaica, Montserrat, Northern Mariana Islands, Puerto Rico, Sint Maarten, St. Kitts & Nevis, St. Lucia, St. Vincent & Grenadines, Trinidad & Tobago, Turks & Caicos Islands, U.S. Virgin Islands, United States
+44: Guernsey, Isle of Man, Jersey, United Kingdom
+61: Australia, Christmas Island, Cocos (Keeling) Islands
+590: Guadeloupe, St. Barthélemy, St. Martin
+7: Kazakhstan, Russia
+39: Italy, Vatican City
+47: Norway, Svalbard & Jan Mayen
+212: Morocco, Western Sahara
+262: Mayotte, Réunion
+290: St. Helena, Tristan da Cunha
+358: Finland, Åland Islands
+599: Caribbean Netherlands, Curaçao

How to get out: exit codes

Most plans use 00 to reach another country; the North American plan uses 011; a few list several codes and name a preferred one.

International exit code

00 186 (76%)
011 26 (11%)
0011 3 (1%)
another code 14 (6%)
several codes 16 (7%)
245 plans

How to dial at home: trunk prefixes

A trunk prefix opens a national call and is dropped after the country code; many plans have none.

Trunk prefix

trunk prefix 0 113 (46%)
no trunk prefix 101 (41%)
trunk prefix 1 26 (11%)
trunk prefix 8 4 (2%)
another prefix 1 (0%)
245 plans

How long a mobile number is

National digits, without the country code or the trunk prefix. A plan counts once per length it allows. The shortest mobile numbers on file are in Niue (4 digits), the longest in Austria (13).

Plans by mobile number length

4 digits	2
5 digits	7
6 digits	12
7 digits	41
8 digits	71
9 digits	99
10 digits	65
11 digits	7
12 digits	2
13 digits	1

plans allowing that length

Where a mobile number can move

In a plan with mobile number portability, a prefix says who a block was allocated to, not who serves a number today.

Mobile number portability

listed 107 (44%)
not listed 138 (56%)
245 plans

A few more

The plan with the most carriers on record is the United States: 1,593 operators hold central office codes under +1.
One plan lists no mobile class at all: Tristan da Cunha.
107 of 245 plans list mobile number portability; everywhere else the allocated carrier is normally the serving one.

Source: National numbering plans, ITU-T E.164 (ITU), and each territory's plan. Figures recompute at every data refresh.