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  2. List of VoIP companies - Wikipedia

    en.wikipedia.org/wiki/List_of_VoIP_companies

    VoIP and mobile phone services sipservice: Winterthur: Switzerland: VoIP service provider TELES AG: Berlin: Germany: VoIP services VirtualPBX: San Jose, CA: United States: Cloud-based telephone systems VocalTec: West Palm Beach and Netanya: United States and Israel: Telecom equipment provider VoiceHost: London: United Kingdom: VoIP and DSL ...

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

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

    There’s an easy way to find out: conduct a reverse phone lookup — for free. But is there a truly free reverse phone lookup? Yes — there are plenty of sites that offer free reverse phone lookups.

  4. Calling Name Presentation - Wikipedia

    en.wikipedia.org/wiki/Calling_Name_Presentation

    The terminating carrier performs a database lookup using the caller's phone number to obtain the name information to display with Caller ID. If the data is with another carrier, then the terminating carrier must perform a lookup and pay a small "dip fee" to the carrier hosting the information. [3]

  5. Telephone number mapping - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_mapping

    One way of doing call forwarding with ENUM is illustrated in the next figure. The caller uses the telephone to dial the number of another subscriber, which leads to an ENUM lookup (such as is provided by SIP Broker). The DNS responds to the caller by returning a list with NAPTR records for VoIP communication, telephone numbers and email addresses.

  6. SIP URI scheme - Wikipedia

    en.wikipedia.org/wiki/SIP_URI_scheme

    A SIP address is written in user@domain.tld format in a similar fashion to an email address.An address like: sip:1-999-123-4567@voip-provider.example.net. instructs a SIP client to use the NAPTR and SRV schemes to look up the SIP server associated with the DNS name voip-provider.example.net and connect to that server.

  7. 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.

  8. List of telecommunications companies - Wikipedia

    en.wikipedia.org/wiki/List_of_telecommunications...

    Mobile phone; Mobile virtual network operator; List of sovereign states by number of broadband Internet subscriptions; List of countries by number of Internet users; List of countries by number of telephone lines in use; List of countries by smartphone penetration; List of multiple-system operators; Companies portal; Telephones portal

  9. Internet telephony service provider - Wikipedia

    en.wikipedia.org/wiki/Internet_telephony_service...

    Retail customers of an ITSP may use traditional analog telephone sets attached to an analog telephony adapter (ATA) to connect to the service provider's network via a local area network, they may use an IP phone, or they may connect a private branch exchange (PBX) system to the service via media gateways.

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