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Landline phone numbers begin with the area code, then one digit for the operator code, then six digits for the primary telephone number. Format: (XXX Y ZZZZZZ) where: "xxx" denotes the area code. All area codes begin with the number 0. The operator code for fixed (landline) numbers is "y".
Before 1994, all phone numbers in Costa Rica were six digits long. The Instituto Costarricense de Electricidad, which at that time had the monopoly on telecommunications, introduced a system in which the telephone numbers in every province were assigned a prefix to make them 7 digits long. This numbering system was effective for some time.
Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, but also sometimes referred to as "country dial-in codes", or historically "international subscriber dialing" (ISD) codes in the U.K., are telephone number dialing prefixes for reaching subscribers in foreign countries or areas via international telecommunication networks.
American television programs and movies often use the central office code 555, or KLamath 5 and KLondike 5 for older periods, in fictitious telephone numbers to prevent disturbing telephone subscribers if anyone dials a telephone number seen or referred to on screen. Not all numbers beginning with 555 are fictional.
The presentation of a telephone number with the plus sign indicates that the number should be dialed with an international calling prefix, in place of the plus sign. The number is presented starting the country calling code. This is called the globalized format of an E.164 number, and is defined in the Internet Engineering Task Force RFC 2806. [6]
Known as block number (Arabic: رقم المجمع) formally. The first digit in NNN format and the first two digits in NNNN format refer to one of the 12 municipalities of the country. PO Box address does not need a block number or city name, just the PO Box number followed by the name of the country, Bahrain. Bangladesh: 16 December 1972 BD: NNNN
Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). If there is only 32.. followed by any other, shorter number, like 32 51 724859, this is the number of a normal phone, not a mobile. 46x: Join (discontinued mobile phone service provider) [3] 47x: Proximus (or other) 48x
A call sign can be any number of letters and numerals but each country must only use call signs that begin with the characters allocated for use in that country. With regard to the second and/or third letters in the prefixes in the list below, if the country in question is allocated all callsigns with A to Z in that position, then that country ...