Area code 518 is a telephone area code in eastern upstate New York, established as one of the original area codes in 1947. It is the largest area code (in size) in the state, extending from the eastern Mohawk Valley to east of Albany and from the Canadian border to the upper Hudson Valley. The boundary of the New York City and Albany metropolitan areas is sometimes said to fall along the 845 and 518 lines.
| State of New York Area Codes: 212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917 | ||
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| North: 450, 613, 819 | ||
| West: 315, 607 | area code 518 | East: 413, 802, 860 |
| South: 845 | ||
| State of Connecticut Area Codes: 203, 475, 860, 959 | ||
| Commonwealth of Massachusetts Area Codes: 339, 351, 413, 508, 617, 774, 781, 857, 978 | ||
| Province of Ontario area codes: 226, 249, 289, 343, 416, 519, 613, 647, 705, 807, 905 | ||
| Province of Quebec area codes: 418, 438, 450, 514, 579, 581, 819 | ||
| State of Vermont Area Code: 802 | ||
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