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  2. Long-distance calling - Wikipedia

    en.wikipedia.org/wiki/Long-distance_calling

    In the call, Friday calls a long-distance operator in Los Angeles and gives the name and number of the called party. The operator then calls a rate-and-route operator, who responds that the call should be routed through Salt Lake City and Mount Pleasant, Utah, and that the rate-step for the call is 140.

  3. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    In many parts of North America, especially in area code overlay complexes, dialing the area code, or 1 and the area code, is required even for local calls. Dialing from mobile phones does not require the trunk code in the US, although it is still necessary for calling all long-distance numbers from a mobile phone in Canada.

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    Many of these telephone numbers are selected from the easily recognizable codes (ERCs). System-wide toll-free calling, for which the receiving party is billed for the call, uses the number range with area codes of the form 8XX. Area code and central office prefixes for other non-geographic services have the form 5XX-NXX.

  5. International telecommunications routes - Wikipedia

    en.wikipedia.org/wiki/International...

    A carrier receives calls in country A, turns them into IP packets using an IP gateway device and sends them over an IP connection (public or dedicated) to another carrier or ISP in country B, which re-assembles the voice call and sends it out from a PBX. The cost is composed of the cost to convert the call, IP connectivity, convert the call back.

  6. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Yes: Send and receive unlimited international texts while in the US. Unlimited incoming international calls to the US. Unlimited incoming international calls over WiFi calling while in the US or International. Unlimited outgoing international calls to US numbers over WiFi calling. [567] [568] Yes [568] Owned by Verizon [569]

  7. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    The RespOrg is not the carrier. A Canadian carrier could be used for Canadian calls and a U.S. carrier for American calls; a user with many inbound local voice over IP numbers in multiple cities could convert toll-free calls on one main toll-free number to local calls in each city where it has a point of presence. Percentage Allocation routing

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