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Area code 415 has been split three times due to the Bay Area's rapid economic growth and demand for telecommunication services: On March 1, 1959, area code 707 was created from the northern part, and area code 408 was created for San Jose , the South Bay , the Monterey Bay , and the Salinas Valley .
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
In several European countries, a different strategy prevailed, known as the open numbering plan, which features a variance in the length of the area code, the local number, or both. [3] United States telephone numbers often included letter prefixes and telephone exchange names, which were more easily memorable for users than long digit sequences.
1-NPA-555-01XX is used for fictional telephone numbers; 1-NPA-555-1212 is used for directory assistance; and other 1-NPA-555-XXXX numbers can be used for other 555 services; 556: not in use; available for personal communications services: 557
The preferred arrangement, over timing, was the prefix method, in which the subscriber had to start dialing ten-digit calls with a 0 or 1 preceding the full telephone number. The preference was based on Bell System behavioral research, but technical aspect also favored this arrangement in some cases, in that it could shorten post-dial delay ...
A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...
Sometimes called a "budget letter" or proof of income letter, the benefit verification statement from ... you can call the toll-free number for the SSA at 800-772-1213 (800-325-0778 for TTY) or ...
Russia has an open numbering plan with 10-digit phone numbers. Trunk prefix is 8 (or 8~CC when using alternative operators, where CC is 21–23, 52–55). International call prefix is 8~10 (or 8~CC when using alternative operators, where CC is 26–29, 56–59). The country code is 7.