Area code 502 serves north central Kentucky, primarily Louisville, its suburbs, and the state capital, Frankfort. Its service area encompasses the following Kentucky counties (the boundary closely, but not exactly, tracks county lines):
- Anderson County
- Bullitt County
- Carroll County
- Franklin County
- Henry County
- Jefferson County
- Nelson County
- Oldham County
- Owen County
- Scott County
- Shelby County
- Spencer County
- Trimble County
- The Fort Knox Army installation, located primarily in Hardin County, also spreads into Meade, and Bullitt counties.
- The city of Muldraugh, which straddles the Meade–Hardin County line and is completely surrounded by Fort Knox.
- The city of West Point in Hardin County and its surrounding area, which is separated from the rest of Hardin County by Fort Knox.
Besides Louisville and Frankfort, other cities within the 502 area code boundary include Georgetown, Shelbyville, and Bardstown. Georgetown is a long-distance call to other cities in the 502 area code, but is a free local call to Lexington, which is in the 859 area code.
The area code was one of the first established in October 1947, initially covering the entire state of Kentucky. The eastern half of the state split off as area code 606 in 1954, while the western half split off as 270 in 1999.
- "364 will be Kentucky's newest area code - New number will cover western portion of current area code 270" (Press release). Kentucky Public Service Commission. 2007-06-13. Archived from the original on 2008-12-01. Retrieved 2007-06-13.
- "Archived copy". Archived from the original on 2006-10-16. Retrieved 2006-10-03.CS1 maint: archived copy as title (link)
- "Archived copy". Archived from the original on 2002-09-11. Retrieved 2006-10-03.CS1 maint: archived copy as title (link)
- "Planning Letter 155: Split of 501 Numbering Plan Area (NPA) in Kentucky" (PDF). Lockheed Martin (North American Numbering Plan Administration). February 1, 1999. Retrieved January 11, 2013.
|West: 812||Area code 502||East: 859|
|South: 270/364, 859|
|Indiana area codes: 219, 260, 317/463, 574, 765, 812/930|
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