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2. 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

3. RespOrg - Wikipedia

   en.wikipedia.org/wiki/RespOrg

   A "data base communication call processing method" [2] patented by Roy P. Weber of Bell Labs, and implemented by AT&T in 1982, broke the link between individual telephone numbers and a specific trunk, city, or carrier. A toll-free number was merely an index into a large, distributed database; any number could be reassigned geographically ...

4. Toll-free telephone number - Wikipedia

   en.wikipedia.org/wiki/Toll-free_telephone_number

   A toll-free telephone number or freephone number is a telephone number that is billed for all arriving calls. For the calling party , a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code .

5. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

   www.aol.com/finance/19-dangerous-scam-phone...

   888 numbers indicate it is a toll-free call. Calls made to toll-free numbers are paid for by the recipient rather than the caller, making them particularly popular among call centers and other ...

6. 555 (telephone number) - Wikipedia

   en.wikipedia.org/wiki/555_(telephone_number)

   The 555 exchange is not reserved in area codes used for toll-free phone numbers. This led to the video game The Last of Us accidentally including the number to a phone-sex operator. [9] The number "555-2368" (or 311-555-2368) is a carryover from the "EXchange 2368" ("Exchange CENTral") number common in telephone advertisements as early as the ...

7. Wide Area Telephone Service - Wikipedia

   en.wikipedia.org/wiki/Wide_Area_Telephone_Service

   Modern systems eliminated requirements tying toll-free numbers to dedicated flat-rate inbound WATS lines. Direct inward dial, introduced in 1983, allowed one trunk to carry calls for multiple numbers. AT&T's monopoly on U.S. toll-free number routing ended in 1986, encouraging flexibility in order to match rivals Sprint and MCI.

8. Toll-free number portability - Wikipedia

   en.wikipedia.org/wiki/Toll-free_number_portability

   The system was redesigned in 1981 to use a database, the SMS/800 service management system, which could direct any toll-free number to any destination based on various conditions; number prefixes remained tied to specific carriers until a RespOrg (responsible organization) structure was introduced in 1993 (US) and 1994 (Canada) to allow ...

9. North American Numbering Plan - Wikipedia

   en.wikipedia.org/wiki/North_American_Numbering_Plan

   Some businesses still display a 2L-5N number in advertisements, e.g., the Belvedere Construction Company in Detroit, Michigan not only still uses the 2L-5N format for its number (TYler 8-7100), it uses the format for the toll-free number (1-800-TY8-7100).