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Mobile telephone numbers. Mobile telephone numbers in Pakistan are of the following format: 03XZ-YYYYYYY where X is the single letter code assigned to a specific mobile telephone operator and Z-YYYYYYY is the local telephone number from any mobile phone or landline. 3 - is the Mobile Access code. Z can be any value between 0 and 9, assigned by ...
National conventions for writing telephone numbers vary by country. The International Telecommunication Union (ITU) publishes a recommendation entitled Notation for national and international telephone numbers, e-mail addresses and Web addresses. Recommendation E.123 specifies the format of telephone numbers assigned to telephones and similar communication endpoints in national telephone ...
Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls. These prefixes are typically required only when dialling from a landline, while in GSM -compliant mobile phone (cell phone) systems, only the symbol + before the country code may be used [citation needed] irrespective of where the telephone is used at that moment; the ...
Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code (or exchange code), and a four-digit station or line code.
The area codes in Pakistan consists of two to five digits; generally smaller the city, longer the prefix. All large cities have two-digit codes. The smaller towns might have six digital whereas big cities have seven digit numbers. Azad Kashmir telephone lines contain five digits. On 1 July 2009, telephone numbers in Karachi and Lahore were ...
Area codes 514, 438, and 263 are telephone area codes of the North American Numbering Plan (NANP) for Montreal and most of its on-island suburbs, specifically the Island of Montreal and Île Perrot in the Canadian province of Quebec. Area code 514 was one of the original North American area codes assigned by AT&T in 1947. The original numbering plan area (NPA) was split twice: in 1957 to ...
Telephone exchange names were used in many countries, but were phased out in favor of numeric systems in the 1960s. In the United States, the demand for telephone service outpaced the scalability of the alphanumeric system and after introduction of area codes for direct-distance dialing, all-number calling became necessary.