3xx Area Codes
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3xx Area Codes

301Maryland (Hagerstown, Frederick, Rockville, Cumberland and western Maryland, overlays with 240)More information at: Area Code 301 Phone Number Blocks
302Delaware (all)More information at: Area Code 302 Phone Number Blocks
303Colorado (Boulder, Longmont, Aurora, Denver and central Colorado, overlays with 720)More information at: Area Code 303 Phone Number Blocks
304West Virginia (to be overlayed by 681)More information at: Area Code 304 Phone Number Blocks
305Florida (all of Miami-Dade County and the Florida Keys of Monroe County: Miami, Homestead, Coral Gables, Key West; overlaid by 786 for all of Miami-Dade but not Keys)More information at: Area Code 305 Phone Number Blocks
306Saskatchewan (all)More information at: Area Code 306 Phone Number Blocks
307Wyoming (all)More information at: Area Code 307 Phone Number Blocks
308Nebraska (North Platte, Scottsbluff, McCook, Kearney, Grand Island and western Nebraska)More information at: Area Code 308 Phone Number Blocks
309Illinois (Peoria, Moline, Rock Island, Galesburg and central western Illinois)More information at: Area Code 309 Phone Number Blocks
310California (Malibu, Torrance, South Bay, Beverly Hills, Santa Monica, Catalina Island, the Los Angeles Westside, and the coastal suburbs of Los Angeles County, overlays with 424)More information at: Area Code 310 Phone Number Blocks
311Local or government non-emergency use, City Hall in some localities.More information at: Area Code 311 Phone Number Blocks
312Illinois (downtown central Chicago area)More information at: Area Code 312 Phone Number Blocks
313Michigan (Dearborn, Detroit and inner Detroit suburbs)More information at: Area Code 313 Phone Number Blocks
314Missouri (St. Louis, Florissant, Crestwood, Affton, and surrounding Missouri suburbs)More information at: Area Code 314 Phone Number Blocks
315New York (Syracuse, Utica, Watertown, and north central New York)More information at: Area Code 315 Phone Number Blocks
316Kansas (Wichita, Augusta, El Dorado, Mulvane and the Wichita surrounding area)More information at: Area Code 316 Phone Number Blocks
317Indiana (Indianapolis, Carmel, Greenwood, Mooresville, Beech Grove and central Indiana)More information at: Area Code 317 Phone Number Blocks
318Louisiana (Shreveport, Monroe, Alexandria, Fisher, Tallulah and northern Louisiana)More information at: Area Code 318 Phone Number Blocks
319Iowa (Burlington, Iowa City, Cedar Rapids, Waterloo and east central and southeastern Iowa)More information at: Area Code 319 Phone Number Blocks
320Minnesota (St. Cloud, Alexandria, Morris, Hutchinson, Sandstone, Appleton and central Minnesota)More information at: Area Code 320 Phone Number Blocks
321Florida (Orlando, Cocoa Beach, St Cloud and central eastern Florida, partial overlay with 407)More information at: Area Code 321 Phone Number Blocks
323California (Florence and Los Angeles excluding downtown Los Angeles; see also 213)More information at: Area Code 323 Phone Number Blocks
325Texas (Abilene, Sweetwater, Snyder, San Angelo)More information at: Area Code 325 Phone Number Blocks
330Ohio (Youngstown, Warren, Akron, Canton and northeastern Ohio, overlays with 234)More information at: Area Code 330 Phone Number Blocks
331Illinois (West Suburban Chicago, overlays 630)More information at: Area Code 331 Phone Number Blocks
334Alabama (Montgomery, Auburn, Opelika, Dothan, Selma and southeastern Alabama)More information at: Area Code 334 Phone Number Blocks
336North Carolina (Winston-Salem, Greensboro, North Wilkesboro, Roxboro, and northwest North Carolina)More information at: Area Code 336 Phone Number Blocks
337Louisiana (Leesville, Lake Charles, Lafayette, New Iberia, Opelousas, De Ridder and southwestern Louisiana), split from 318 on October 11, 1999)More information at: Area Code 337 Phone Number Blocks
339Massachusetts (Saugus, Norwood, Waltham, Woburn, east central Massachusetts and other Boston suburbs along Route 128, overlays with 781)More information at: Area Code 339 Phone Number Blocks
340the U.S. Virgin Islands, split from 809. (all)More information at: Area Code 340 Phone Number Blocks
341California This Area code is scheduled to provide numbering relief for Area code 510 but no date has been assigned for this to go into effect.More information at: Area Code 341 Phone Number Blocks
343Ontario (Ottawa, eastern and southeastern Ontario) This area code is scheduled to provide numbering relief to area code 613 effective in 2011.More information at: Area Code 343 Phone Number Blocks
345the Cayman Islands, split from 809. (all)More information at: Area Code 345 Phone Number Blocks
347New York (New York City except Manhattan generally for mobile phones; overlays with 718 and 917)More information at: Area Code 347 Phone Number Blocks
351Massachusetts (Fitchburg, Peabody and northeastern Massachusetts, overlays with 978)More information at: Area Code 351 Phone Number Blocks
352Florida (Gainesville, Ocala, Inverness, Dunnellon and central Florida)More information at: Area Code 352 Phone Number Blocks
360Washington (Bellingham, Belfair, Bremerton, Aberdeen, Olympia and western Washington except the greater Seattle area, which uses the 206, 253, and 425 area codes)More information at: Area Code 360 Phone Number Blocks
361Texas (Corpus Christi, Victoria, George West and South Texas)More information at: Area Code 361 Phone Number Blocks
364Kentucky west of the Pennyrile Parkway, beginning January 1, 2009. Includes Paducah; overlays with 270.More information at: Area Code 364 Phone Number Blocks
369California This code is scheduled to provide numbering relief to Area code 707, but no date has been assigned for this to go into effect.More information at: Area Code 369 Phone Number Blocks
380Ohio This Area code is scheduled to provide numbering relief to Area code 614 but no date has been assigned for this to go into effect.More information at: Area Code 380 Phone Number Blocks
385Utah (Salt Lake, Utah, Davis, Weber and Morgan counties, overlays with 801), beginning mid 2008.More information at: Area Code 385 Phone Number Blocks
386Florida (Daytona Beach, Lake City, Live Oak, Crescent City and northern and eastern Florida)More information at: Area Code 386 Phone Number Blocks