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  2. 1-5-7-1 - Wikipedia

    en.wikipedia.org/wiki/1-5-7-1

    1-5-7-1 is a family of calling features in the United Kingdom, for residential and business telephone lines and for mobile telephones, that are provided by BT Group and several other telephone service providers. The family is named after the telephone number 1571, the special service number that is used to access it.

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

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

    0800 later used for BT Freefone numbers - usage of BT 9-digit 0800 numbers continued after the Big Number Change; all new 0800 allocations have 10 digits and multiple operators now issue 0800 numbers. 01801 — unused; 0801 was Thrapston, Oundle – – Was originally 0085 (OU5) until changed to 0801 in 1968 – numbers were transferred to 0832 ...

  4. Telephone numbers in the United Kingdom - Wikipedia

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

    Free to call from landline, and was up to 40p per minute from mobile, until July 2015 when calls to 080 numbers from mobiles became free. Calls to certain charity and similar services were always free from most mobiles. 0808 9xx xxxx numbers are used by freephone internet services. 0800 xxx xxxx; 0808 xxx xxxx

  5. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    An automatic number announcement circuit (ANAC) is a component of a central office of a telephone company that provides a service to installation and service technicians to determine the telephone number of a telephone line. The facility has a telephone number that may be called to listen to an automatic announcement that includes the caller's ...

  6. Telephone directory - Wikipedia

    en.wikipedia.org/wiki/Telephone_directory

    Subscriber names are generally listed in alphabetical order, together with their postal or street address and telephone number.In principle every subscriber in the geographical coverage area is listed, but subscribers may request the exclusion of their number from the directory, often for a fee; their number is then said to be "unlisted" (US and Canada), "ex-directory" (British English), or ...

  7. PhONEday - Wikipedia

    en.wikipedia.org/wiki/PhONEday

    Logo used in informational material. PhONEday was a change to telephone numbering in the United Kingdom on Sunday 16 April 1995. A shortage of unique telephone numbers in the old dialling system meant that it was becoming increasingly difficult in certain areas of the country to assign unique numbers to new subscribers.

  8. Automatic number identification - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    Automatic number identification (ANI) [1] [2] is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes. Automatic number identification was originally created by the American Telephone and Telegraph Company (AT&T) for long distance service in the Bell System ...

  9. Last-call return - Wikipedia

    en.wikipedia.org/wiki/Last-call_return

    Previously free, since August 2004 the return call service incurs a charge. The service provider may also offer a facility by which the calling party can prevent their number being revealed to the called party, either permanently or on a per-call basis. This is achieved by prefixing the dialed number with: