- The 205 area code serves a western and central portion of Alabama, serving communities such as Birmingham, Tuscaloosa, Bessemer, and Jasper.
- The 212 area code serves most of the borough of Manhattan in New York City.
- The 215 area code serves the City of Philadelphia as well as Bucks and Montgomery counties in the Commonwealth of Pennsylvania. The original area code was 215, established in 1947.
- The 303 area code serves central Colorado, including the larger cities and communities of Aurora, Boulder, Brighton, Broomfield, Castle Rock, Castlewood, Columbine, Commerce City, Denver, Englewood, Highlands Ranch, Ken Caryl, Lafayette, Lakewood, Littleton, Longmont, Loveland, Northglenn, Parker, and Southglenn.
- The 312 area code is the telephone area code for downtown Chicago, which includes the Chicago Loop and its immediate environs.
- The 317 area code serves Indianapolis and nine surrounding counties in central Indiana. It covers all or part of Marion, Boone, Hancock, Hamilton, Hendricks, Johnson, Madison, Morgan, and Shelby counties.
- The 414 area code serves the area around and including the city of Milwaukee in Wisconsin. The area code was created in October 1947 and is one of the two original area codes assigned to Wisconsin.
- The 415 area code serves the greater San Francisco Bay Area, including the City and County of San Francisco, the majority of Marin County, and a small portion of San Mateo County.
- The 503 area code serves the northwestern region of Oregon, including Portland, Salem, and Astoria.
- The 504 area code covers greater New Orleans, Louisiana. Besides New Orleans itself (Orleans Parish), it includes all of St. Bernard and Plaquemines parishes and most of Jefferson Parish. 504 was one of the original area codes created in 1947, and originally covered all of Louisiana.
- The 507 area code covers the southern fifth of Minnesota, including cities such as Rochester, Mankato, Worthington, Fairmont, Albert Lea, and Austin. It was the third area code created for use in the state in 1954, following the original 218 and 612.
- The 607 area code serves parts of its Southern Tier (which borders Pennsylvania). It was created in 1954 by combining the southern portion of 315 and the eastern portion of 716.
- The 612 area code serves the city of Minneapolis, Minnesota, and a few surrounding areas such as Fort Snelling, St. Anthony, and Richfield.
- The 707 area code serves Coastal Northern California, north of Vallejo to the Oregon border, and the southern portions of 707 are located in the San Francisco, Santa Rosa, and Vallejo Metropolitan Statistical Areas (MSA).
- The 802 area code serves the State of Vermont.
- The 906 area code serves the Upper Peninsula of Michigan.
- The 914 area code serves Westchester County, New York.
- The 920 area code covers much of eastern Wisconsin. It was created on July 26, 1997, in a split from area code 414. 414 formerly covered the entire eastern third of the state.
- Double Post
- Size: 1.25" x .5"
