area codes: 200, 300, 400, 500, 600, 700, 800, 900
| Area Code | State | City |
| 201 | NJ | N New Jersey: Jersey City, Hackensack |
| 202 | DC | Washington, D.C. |
| 203 | CT | Connecticut |
| 204 | MB | Manitoba Canada |
| 205 | AL | Alabama (including Huntsville and Birmingham; excludes only the southeastern corner of Alabama and the deep south.) |
| 206 | WA | W. Washington state: Seattle |
| 207 | ME | Maine |
| 208 | ID | Idaho |
| 209 | CA | Central California |
| 210 | TX | San Antonio S. Texas |
| 212 | NY | New York City, New York |
| 213 | CA | Los Angeles California |
| 214 | TX | Dallas Texas |
| 215 | PA | Philadelphia Pennsylvania |
| 216 | OH | Cleveland |
| 217 | IL | Central Illinois |
| 218 | MN | North Minnesota |
| 219 | IN | North Indiana |
| 224 | IL | Northern NE Illinois |
| 225 | LA | Louisiana: Baton Rouge, New Roads, Donaldsonville, Albany, Gonzales, Greensburg, Palquemine, Vacherie |
| 226 | ON | SW Ontario Canada |
| 228 | MS | South Mississippi |
| 229 | GA | SW Georgia |
| 231 | MI | Michigan |
| 234 | OH | NE Ohio |
| 236 | VA | Virginia |
| 239 | FL | Florida |
| 240 | MD | West Maryland: Silver Spring, Frederick |
| 242 | Bahamas | |
| 246 | Barbados | |
| 248 | MI | Michigan: Oakland county |
| 250 | BC | British Columbia |
| 251 | AL | South Alabama |
| 252 | NC | NE Carolina |
| 253 | WA | South Washington |
| 254 | TX | Central Texas |
| 256 | AL | North and East Alabama |
| 260 | IN | NE Indiana |
| 262 | WI | Wisconsin |
| 264 | Anguilla | |
| 267 | PA | SE Pennsylvania: Philadelphia |
| 268 | Antigua and Barbuda | |
| 269 | MI | SW Michigan |
| 270 | KY | West Kentucky |
| 276 | VA | South Virginia |
| 278 | MI | Michigan |
| 280 | MD | Maryland |
| 281 | TX | Texas: Houston Metro |
| 282 | IL | Illinois |
| 283 | OH | SW Ohio |
| 284 | British Virgin Islands | |
| 289 | ON | South Central Canada |