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Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
List of Available Area Code No. Area Available Area Code Numbers Format 1: access from all provinces: 907: 909 907 XXXX 2: universal access numbers: 221: 909 221 XXXX 3: access from Tehran province: 230: 909 230 XXXX 4: access from Qom province: 252: 909 252 XXXX 5: access from West Azerbaijan province: 444: 909 444 XXXX 6: access from Razavi ...
When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.
All mobile phone codes have four digits, and start with 03xx. All mobile numbers have seven digits, and denote the mobile provider on a nationwide basis and not geographic location. Thus all Telenor numbers (for example) nationwide carry mobile code 0345 etc. Universal access number 111 xxx xxx; Emergency Service Numbers 1xx; 1xxx; Premium Rate ...
4. Enter your area code and click Next. 5. Select 2-3 access phone numbers and click Next. Note: You cannot manually type in an access number. An access number can only be selected from the list provided. 6. Confirm your settings and click Next. 7. Click Sign on.
For example, 234 235-5678 is a valid telephone number; with area code 234, central office prefix (exchange) 235, and line number 5678. The number 234 911-5678 is invalid, because the central office code must not be in the form N11.
Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...
The two-letter codes are used as the basis for other codes and applications, for example, for ISO 4217 currency codes; with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs. Other applications are defined in ISO 3166-1 alpha-2.