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

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

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

3. 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.

4. List of mobile network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_network...

   Sold spectrum licenses to AT&T and T-Mobile and exited the business. [41] Blaze Wireless: GSM, UMTS: EDGE, HSPA+, LTE: Unknown: December 2019: Parent company, Pinpoint Communications, discontinued cellular service and spectrum leases through Viaero Wireless were cancelled. Blue Wireless: CDMA2000: EV-DO, LTE: Unknown: July 2020

5. List of VoIP companies - Wikipedia

   en.wikipedia.org/wiki/List_of_VoIP_companies

   Web and Mobile applications, VoIP telephone service, broadband internet providers, and commercial telecommunication service Fastweb: Milan: Italy: Landline, broadband Internet, and digital television services Google: California: United States: instant messaging, video chat, SMS, and VoIP features through Google Hangouts and Google Voice ...

6. Pinger - Wikipedia

   en.wikipedia.org/wiki/Pinger

   Pinger, Inc. is a US Telecom provider for free texts, pictures, calls, and voicemails. [1] Pinger was founded in 2005 by former Palm, Inc. managers Greg Woock ( CEO of Pinger, Inc) and Joe Sipher. The company is headquartered in San Jose , California.

7. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

   www.aol.com/free-reverse-phone-lookup-8...

   Spy Dialer is a free reverse phone lookup service that accesses public databases of registered phone numbers to help users find information on cell phone and landline numbers and emails.