Area Code Listing From 301 to 399

Area Codes Table 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 311 Unassigned 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 322 Unassigned 323 US California Pacific Time Zone 324 Unassigned 325 US Texas Central Time Zone 326 US Ohio Eastern Time Zone 327 US Arkansas Central Time Zone 328 Unassigned 329 Unassigned 330 US Ohio Eastern Time Zone 331 US Illinois Central Time Zone 332 US New York Eastern Time Zone 333 Unassigned 334 US Alabama Central Time Zone 335 Unassigned 336 US North Carolina Eastern Time Zone 337 US Louisiana Central Time Zone 338 Unassigned 339 US Massachusetts Eastern Time Zone 340 US Virgin Islands Atlantic Time Zone 341 US California Pacific Time Zone 342 Unassigned 343 Canada Ontario Eastern Time Zone 344 Unassigned 345 Cayman Islands Eastern Time Zone 346 US Texas Central Time Zone 347 US New York Eastern Time Zone 348 Unassigned 349 Unassigned 350 Unassigned 351 US Massachusetts Eastern Time Zone 352 US Florida Eastern Time Zone 353 Unassigned 354 Unassigned 355 Unassigned 356 Unassigned 357 Unassigned 358 Unassigned 359 Unassigned 360 US Washington Pacific Time Zone 361 US Texas Central Time Zone 362 Unassigned 363 Unassigned 364 US Kentucky Central Time Zone 365 Canada Ontario Eastern Time Zone 366 Unassigned 367 Canada Quebec Eastern Time Zone 368 Canada Alberta Mountain Time Zone 369 Unassigned 370 Unassigned 371 Unassigned 372 Unassigned 373 Unassigned 374 Unassigned 375 Unassigned 376 Unassigned 377 Unassigned 378 Unassigned 379 Unassigned 380 US Ohio Eastern Time Zone 381 Unassigned 382 Canada Ontario Eastern Time Zone 383 Unassigned 384 Unassigned 385 US Utah Mountain Time Zone 386 US Florida Eastern Time Zone 387 Canada Ontario Eastern Time Zone 388 Unassigned 389 Unassigned 390 Unassigned 391 Unassigned 392 Unassigned 393 Unassigned 394 Unassigned 395 Unassigned 396 Unassigned 397 Unassigned 398 Unassigned 399 Unassigned Note: Area codes in gray represents the location is outside of the 50 states of the U.S. and Canada.

This page was last updated on September 25, 2020.