| Area Code |
Country |
State |
Time Zone |
| 301 | US | Maryland | Eastern Time Zone |
| 302 | US | Delaware | Eastern Time Zone |
| 303 | US | Colorado | Mountain Time Zone |
| 304 | US | West Virginia | Eastern Time Zone |
| 305 | US | Florida | Eastern Time Zone |
| 306 | Canada | Saskatchewan | Central Time Zone, Mountain Time Zone |
| 307 | US | Wyoming | Mountain Time Zone |
| 308 | US | Nebraska | Central Time Zone, Mountain Time Zone |
| 309 | US | Illinois | Central Time Zone |
| 310 | US | California | Pacific Time Zone |
| 312 | US | Illinois | Central Time Zone |
| 313 | US | Michigan | Eastern Time Zone |
| 314 | US | Missouri | Central Time Zone |
| 315 | US | New York | Eastern Time Zone |
| 316 | US | Kansas | Central Time Zone |
| 317 | US | Indiana | Central Time Zone |
| 318 | US | Louisiana | Central Time Zone |
| 319 | US | Iowa | Central Time Zone |
| 320 | US | Minnesota | Central Time Zone |
| 321 | US | Florida | Eastern Time Zone |
| 323 | US | California | Pacific Time Zone |
| 325 | US | Texas | Central Time Zone |
| 327 | US | Kentucky | Eastern Time Zone |
| 330 | US | Ohio | Eastern Time Zone |
| 331 | US | Illinois | Central Time Zone |
| 334 | US | Alabama | Central Time Zone |
| 336 | US | North Carolina | Eastern Time Zone |
| 337 | US | Louisiana | Central Time Zone |
| 339 | US | Massachusetts | Eastern Time Zone |
| 340 | US Virgin Islands | | Atlantic Time Zone |
| 345 | Cayman Islands | | Eastern Time Zone |
| 347 | US | New York | Eastern Time Zone |
| 351 | US | Massachusetts | Eastern Time Zone |
| 352 | US | Florida | Eastern Time Zone |
| 353 | US | Wisconsin | Central Time Zone |
| 358 | US | Pennsylvania | Eastern Time Zone |
| 360 | US | Washington | Pacific Time Zone |
| 361 | US | Texas | Central Time Zone |
| 369 | US | California | Pacific Time Zone |
| 380 | US | Ohio | Eastern Time Zone |
| 381 | US | Virginia | Eastern Time Zone |
| 383 | US | Maine | Eastern Time Zone |
| 385 | US | Utah | Mountain Time Zone |
| 386 | US | Florida | Eastern Time Zone |