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

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

    In the early 1980s, Bell Labs received a patent for what became AT&T's "Advanced 800 Service", a computer-controlled system where any toll-free number could point to any destination number, such as to a small business local number instead of a special InWATS line, and an itemized bill generated only for the calls the business actually received.

  3. UnitedHealth Group - Wikipedia

    en.wikipedia.org/wiki/UnitedHealth_Group

    Selling insurance products under UnitedHealthcare, and health care services under the Optum brand, it is the world's ninth-largest company by revenue and the largest health care company by revenue. The company is ranked 8th on the 2024 Fortune Global 500. [4] UnitedHealth Group had a market capitalization of $460.3 billion as of December 20, 2024.

  4. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Calls are free for all fixed line calls. Mobile carriers AIS and CAT (60+%o f Thailand's subscribers) offer 1-800 service for cell phones. DTAC and True mobile providers currently [when?] do not, but it is expected they will offer the 1-800 service for subscribers by late 2009. [needs update] In Turkey, the prefix for toll-free numbers is "0800".

  5. UnitedHealth says unit Change has restored and rebuilt ... - AOL

    www.aol.com/news/unitedhealth-says-unit-change...

    Change Healthcare, which processes about 50% of medical claims in the U.S. for around 900,000 physicians, 33,000 pharmacies, 5,500 hospitals and 600 laboratories, was breached on Feb. 21 by a ...

  6. UnitedHealth unit Change faces issue processing some medical ...

    www.aol.com/news/unitedhealth-unit-change...

    800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. ... Change Healthcare. A fix has been implemented and is being monitored to ensure operability, Change operator Optum, said in a ...

  7. RespOrg - Wikipedia

    en.wikipedia.org/wiki/RespOrg

    RespOrgs were established in 1993 as part of a Federal Communications Commission order instituting toll-free number portability. [1] A RespOrg (pronounced as though it were a single word, something like "ressporg") can be a long-distance company, reseller, end user or an independent that offers an outsourced service.