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  2. Telephone numbers in Guyana - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Guyana

    Location Billing Prefix Assigned DN Range Assigned Cut-Over Date Mabaruma: 777: 5XXX-9XXX: 18.I.2001 Port Kaituma: 777: 0XXX-4XXX: 18.I.2001 Matthews Ridge: 775

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

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

  4. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    01869 — Bicester, Oxfordshire – – Was originally 0095 (OX5) until changed to 0869 in 1968. 01870 — Isle of Benbecula, Outer Hebrides, Uist (US0) – – Was originally 0047 (OH) until changed to 0870 in 1968. 01871 — Castlebay, Outer Hebrides – – Was originally 0047 (OH7) until changed to 0871 in 1968.

  5. List of international call prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_international_call...

    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 ...

  6. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    In the United Kingdom, telephone numbers are administered by the Office of Communications (Ofcom). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations. Telephone numbers are of variable length.

  7. Call signs in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Call_signs_in_the_United...

    Call signs in United Kingdom include a three letter country code, and a series of letters and numbers. [1][2][3] Call signs are regulated internationally by the ITU as well as nationally in the UK by the Office of Communications (Ofcom). [4] It regulates amateur radio in the country as an independent regulator and competition authority for the ...

  8. International call - Wikipedia

    en.wikipedia.org/wiki/International_call

    International telephone calls are those made between different countries. These telephone calls are processed by international gateway exchanges (switches). Charges for these calls were high initially but declined greatly during the 20th century due to advances in technology liberalization. Originally they were placed via long-distance operators.

  9. 999 (emergency telephone number) - Wikipedia

    en.wikipedia.org/wiki/999_(emergency_telephone...

    999 is the official emergency number for the United Kingdom, but calls are also accepted on the European Union emergency number, 112. All calls are answered by 999 operators, and are always free. [2] Approximately 35 million 999/112 calls are made in the UK each year, with 74% from mobiles and 26% from landlines in 2022.