country calling code detat

List of country calling codes

Worldwide distribution of country calling codes. Regions are colored by first digit.

Country calling codes or country dial-in codes are telephone number prefixes for reaching telephone subscribers in the networks of the member countries or regions of the International Telecommunication Union (ITU). The codes are defined by the ITU-T in standards E.123 and E.164. The prefixes enable international direct dialing (IDD), and are also referred to as international subscriber dialing (ISD) codes.

Country codes are a component of the international telephone numbering plan, and are necessary only when dialing a telephone number to establish a call to another country. Country codes are dialed before the national telephone number. By convention, international telephone numbers are represented by prefixing the country code with a plus sign (+), which also indicates to the subscriber that the local international call prefix must first be dialed. For example, the international call prefix in all countries belonging to the North American Numbering Plan[notes 1] is 011, while it is 00 in most European, Asian and African countries. On GSM (cellular) networks, the prefix may automatically be inserted when the user prefixes a dialed number with the plus sign.

Ordered by code

While there is a general geographic grouping to the zones, some exceptions exist for political and historical reasons. Thus, the geographical indicators below are approximations only.

Zone 1: North American Numbering Plan

Member countries of the North American Numbering Plan (NANP) are assigned three-digit area codes under the common country prefix 1, shown in the format +1 XXX.

The North American Numbering Plan includes:

Zone 2: Mostly Africa

(but also Aruba, Faroe Islands, Greenland and British Indian Ocean Territory)

Zones 3–4: Europe

Originally, larger countries such as Spain, the United Kingdom and France, were assigned two-digit codes to compensate for their usually longer domestic numbers. Small countries, such as Iceland, were assigned three-digit codes. Since the 1980s, all new assignments have been three-digit regardless of countries' populations.

Zone 5: Americas outside the NANP

Zone 6: Southeast Asia and Oceania

Zone 7: Parts of the former Soviet Union

Zone 8: East Asia and special services

Zone 9: Mostly Middle East and parts of southern Asia

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