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Area code 309 was created by merging the western part of 815, including the Illinois side of the Quad Cities, with the northern portion of area code 217. The new area code was one of the first area codes not serving an entire state, but having the digit 0 in the middle position of the code.
Codes 880 through 882 were used (until 1 April 2004) to allow international customers to access toll-free numbers they otherwise could not by paying the international portion of the toll. 880 was paired with 800, 881 with 888, and 882 with 877. [21] 888: toll-free telephone service: March 1, 1996: created; 889: not in use; available for toll ...
602 was the original area code for Arizona, and was split in 1995 into 602, serving metropolitan Phoenix, and 520, serving the remainder of the state. [1] In 1999, 602 was split into 480, 602, and 623, [2] which were recombined in 2023. [3] 520 was split in 2001 to form area code 928. [4]
Ten-digit dialling became mandatory in both area codes, 819 and 613, on October 21, 2006, and exchange protection was largely ended. Seven-digit local calls in centres far from the area code boundary (such as Trois-Rivières and Belleville , with no local calling into any other area code at the time) were failing, with intercept messages ...
Sometime after September 1956, [1] the 815 numbering plan area was divided roughly in half along a north-westerly to south-easterly running line, assigning area code 309 to its western part. It was the only new area code created in Illinois between 1947 and the 1989 creation of area code 708 .
[1] The first of the new area codes, 587, entered service on September 19, 2008, as an overlay for the entire province. [2] [3] [4] As a preliminary step, ten-digit dialling was introduced across the province on an optional basis on June 23. This became mandatory on September 12.
The only base-4 repunit prime is 5 (). = (+) (), and 3 always divides + when n is odd and when n is even. For n greater than 2, both + and are greater than 3, so removing the factor of 3 still leaves two factors greater than 1.
UPC-A compatible - Used to issue restricted circulation numbers within a geographic region [1] 030–039: UPC-A compatible - United States drugs (see United States National Drug Code) 040–049: UPC-A compatible - Used to issue restricted circulation numbers within a company 050–059: UPC-A compatible - GS1 US reserved for future use 060–099