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  2. Ten-digit dialing - Wikipedia

    en.wikipedia.org/wiki/Ten-digit_dialing

    The implementation and expansion of the North American Numbering Plan between 1947 and 1992 preserved a long-standing practice in the United States and Canada that callers should only need to dial the local seven-digit telephone number when placing a call within the caller's exchange area or within the home numbering plan area (NPA).

  3. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    Typically a call within a rate center is local, while a call from one rate center to another is a long-distance call.) Together with aggressive reclamation of unused number blocks from telecom providers, number pooling has reduced the need for additional area codes, so that many previously designated area splits and overlays have been postponed ...

  4. Blue box - Wikipedia

    en.wikipedia.org/wiki/Blue_box

    Blue box designed and built by Steve Wozniak and sold by Steve Jobs before they founded Apple. Displayed at the Powerhouse Museum, from the collection of the Computer History Museum [1] A blue box is an electronic device that produces tones used to generate the in-band signaling tones formerly used within the North American long-distance ...

  5. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    E.123, national format: long-distance prefix and city code in parentheses (national format: long-distance prefix and settlement code in parentheses due to possible confusion needs constant additional clarification), п. 2.8 [11]), the phone number is separated from the code and separated by spaces +380 (44) 1234567

  6. How to dial a number in the US? - Paris Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g187147-i14-k...

    travelnutty is correct, the + automatically signals a possible international number so if + is dialed, there is no need to dial the 00. The advantage of using the + rather than dialing the international access number is that, depending upon from where the calls originates, the international access number may vary or it may not be necessary.

  7. How to phone Sint Maarten from the USA & Canada.... - St ...

    www.tripadvisor.com/ShowTopic-g147346-i222-k...

    Under NANP (North American Numbering Plan) Sint Maarten can now be "dialed" just as if you were making a long distance call from home - dial 1+721 (area code) + local number - remember that International calling rates apply.-----Other countries and areas under the plan are •Anguilla: 264

  8. Phreaking - Wikipedia

    en.wikipedia.org/wiki/Phreaking

    Before 1984, long-distance telephone calls were a premium item in the United States, with strict regulations. In some locations, calling across the street counted as long distance. [ 4 ] To report that a phone call was long-distance meant an elevated importance because the calling party is paying by the minute to speak to the called party.

  9. Phoning to, from and within the UK - London Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g186338-i17-k...

    TO CALL THE UK FROM THE U.S.- Intl code + country code + area code (leaving off the initial zero of the area code) + local number, ex. 011 44 20 1234 5678. TO CALL ITALY / FRANCE FROM THE UK - Intl code + country code + local number (leaving off any initial zeros of the local number), ex. 00 39or33 then local number.

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