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Public resistance to the introduction of new area codes, whether as overlay complexes (which allowed customers to keep their existing numbers, but broke seven-digit local calling) or by area code splits (where the area code of existing numbers was changed), prompted the FCC and state commissions to introduce thousands-block number pooling, i.e. the allocation of number space in blocks of only ...
The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits.
800-271 for Trinidad; 800-855 is reserved for services for deaf or hearing-impaired users; [1] these TTY-related numbers, operated by individual telephone companies, are assigned directly by the North American Numbering Plan Administrator (NANPA) Several other prefixes, including 800-484, 800-703, 800-744, and 800-904 are reserved by the FCC.
Many properties of a natural number n can be seen or directly computed from the prime factorization of n.. The multiplicity of a prime factor p of n is the largest exponent m for which p m divides n.
[2] 410 Gone The user existed once, but is not available here any more. [1]: §21.4.10 411 Length Required The server will not accept the request without a valid Content-Length. [8]: §7.4.12 Deprecated by omission from later RFCs [1] and by non-registration with the IANA. [2] 412 Conditional Request Failed The given precondition has not been ...
In the January 9, 1976 episode of Sanford and Son "Can You Chop This [2]", Fred Sanford was promoting Whopper Choppers and asked callers to call the number 555-0179 in both the English and Spanish languages. In 1979, the B-52's recorded the song "6060-842." The fictional exchange prefix "606" had a 0 in the second position.
The current dialling plan is in force since 4 June 2011 when a wide-ranging reform took place. Specifically, area codes were updated to start with 2 or 3, mobile numbers came to begin with the digit 5, and some geographical numbers were padded with an additional digit 2 or 3 immediately after the area code to the total number of digits equalling 9.
500 = 2 2 × 5 3. It is an Achilles number and a Harshad number , meaning it is divisible by the sum of its digits. It is the number of planar partitions of 10.