In the US and Canada, area codes must have the first digit 2 through 9 and the second digit 0 through 8. Also, the second and third digits cannot be the same for a regular geographic area code. In the US, an area code never crosses a state line, with the sole exception of the tiny town of Hyder, Alaska, which uses area code 250 from the neighboring town in Canada. If you dial the prefix 1, then you must dial the area code; it is no longer possible to dial, for example, 1-555-0123 for a long-distance call in the same area code.
If you look at maps, you will not find area codes. Area codes can be found on area code locator websites. Another place to find area codes is in the telephone directory.
282 rules, plus an epilogue and a prologue.
In North America, general purpose area codes are area codes that are available for assignment as geographic area codes; in other words, all unassigned area codes that are not reserved for other purposes. Area codes ending in '11' are unusable due to conflict with N11 short codes such as 911 and 711. Area codes with the second and third digit the same are reserved as "easily remembered" codes such as 800/888/877/866/855/844 toll-free and 900 premium numbers. Area codes with '9' as the middle digit are reserved for future expansion. Most other unassigned area codes in the range 200 to 999 are general purpose area codes.
In the United States, the states with the most area codes are:California (30 area codes, will be 31 as of 2012-11-20)Texas (24 area codes)Florida (17 area codes)New York (15 area codes)Illinois (13 area codes, with three more planned for 2013)When area codes were first introduced in 1947, California had 3, Texas had 4, Florida had only 1, New York had 5, and Illinois had 4.
Area codes in the US and Canada were introduced in 1947.
There are about 300 area codes in the United States, about 30 in Canada, and about 20 in other miscellaneous islands in or near the Caribbean that share country code +1 with the US and Canada. There are about 400 area codes in Mexico. There are about 600 area codes in the UK. There are about 5,200 area codes in Germany.
If a dbms follows more than 7 codes rules than it become rdbms.oracle follows 10 rules which is considered as ideal rdbms.no rdbms exist till now which follows all the 12 codes rules.
The first telephone area codes were issued for the USA and Canada in 1947. The first telephone area codes were issued in the UK in 1958.
There are currently 10 area codes in Ohio. When Ohio needs more area codes they will introduce an eleventh area code for the Columbus/Central Ohio area and a twelfth area code for the Cincinnati region.
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Area Codes - song - was created on 2001-07-03.
Area codes are discrete data.