International Telephone Numbering Zone

The International Telephone Numbering Zone refers to the globally standardized framework used to organize, assign and manage country calling codes within the international public telecommunications network. Structured under the ITU-T E.164 numbering plan, these zones ensure that every nation and territory is uniquely identifiable, enabling efficient routing and interoperability across worldwide communication systems. By dividing the globe into clearly defined geographical and service-based numbering regions, the system supports seamless international dialing, promotes regulatory consistency and facilitates the integration of emerging technologies within global telephony infrastructure. Below is the list of the International Telephone Numbering Zone.

Zone Code	Geographic Region	Examples of Country Codes
1	North America (NANP)	United States (+1), Canada (+1), and the Caribbean.
2	Africa	Egypt (+20), South Africa (+27), Nigeria (+234).
3	Europe	France (+33), Spain (+34), Italy (+39).
4	Europe	United Kingdom (+44), Denmark (+45), Germany (+49).
5	South and Central America	Brazil (+55), Mexico (+52), Argentina (+54).
6	Southeast Asia and Oceania	Australia (+61), Malaysia (+60), Singapore (+65).
7	Eurasia	Russia (+7), Kazakhstan (+7).
8	East Asia and Special Services	China (+86), Japan (+81), South Korea (+82).
9	Middle East, South Asia and West Asia	India (+91), Turkey (+90), Saudi Arabia (+966).

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