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Twilio was founded in 2008 by Jeff Lawson, Evan Cooke, and John Wolthuis [4] and was based initially in Seattle, Washington, and San Francisco, California. [5] On November 20, 2008, the company launched Twilio Voice, an API to make and receive phone calls completely hosted in the cloud. [6] Twilio's text messaging API was released in February ...
Automatic number identification. Automatic number identification ( ANI) [1] [2] is a feature of a telecommunications network for automatically determining the origination telephone number on toll calls for billing purposes. Automatic number identification was originally created by the American Telephone and Telegraph Company (AT&T) for long ...
SendGrid (also known as Twilio SendGrid) is a Denver, Colorado-based customer communication platform for transactional and marketing email. The company was founded by Isaac Saldana, Jose Lopez, and Tim Jenkins in 2009, and incubated through the Techstars accelerator program.
Comparison of OTP applications. The following is a general comparison of OTP applications that are used to generate one-time passwords for two-factor authentication (2FA) systems using the time-based one-time password (TOTP) or the HMAC-based one-time password (HOTP) algorithms.
You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following reasons:
The remaining eight digits are the subscriber number. Toll Free: These are usually ten digit numbers beginning with 800 or 400. 800 (toll-free) are accessible only when called from landline phones, while 400 (shared toll) are accessible from all phones. 400 XXX XXXX or 800 XXXX XXXX.
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
Telephone number verification. Telephone number verification (or validation) services are online services used to establish whether a given telephone number is in service. They may include a form of Turing test to further determine if a human answers or answering equipment such as a modem, fax, voice mMail or answering machine .
1. International access. 011. List of dialing codes. The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably ...
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.
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