Area Code 240

General Information
Country United States
State/Province Maryland
Major City Gaithersburg
Time Zone Eastern (UTC-05:00)
Current Local Time 01:35

Area Code Prefixes

Prefix County Primary City
240-200 Prince Georges Brentwood
240-201 Saint Marys Ridge
240-203 Washington Hagerstown
240-204 Montgomery Chevy Chase
240-205 Montgomery Glen Echo
240-206 Prince Georges Bowie
240-207 Frederick Monrovia
240-208 Charles Port Tobacco
240-209 Charles Indian Head
240-210 Charles Waldorf
240-212 Garrett Oakland
240-213 Charles Waldorf
240-214 Saint Marys Charlotte Hall
240-215 Frederick Frederick
240-216 Charles Waldorf
240-217 Washington Hagerstown
240-218 Charles Nanjemoy
240-219 Saint Marys Ridge
240-220 Montgomery Poolesville
240-221 Montgomery Rockville
240-222 Charles Waldorf
240-223 Prince Georges Brentwood
240-224 Montgomery Gaithersburg
240-225 Frederick Frederick
240-228 Anne Arundel Laurel
240-229 Charles Waldorf
240-230 Charles Hughesville
240-231 Washington Hagerstown
240-232 Prince Georges Brentwood
240-233 Charles Issue
240-234 Prince Georges Brentwood
240-235 Montgomery Chevy Chase
240-236 Frederick Frederick
240-237 Saint Marys Callaway
240-238 Montgomery Rockville
240-239 Saint Marys Leonardtown
240-241 Montgomery Bethesda
240-242 Montgomery Bethesda
240-243 Montgomery Gaithersburg
240-244 Montgomery Bethesda
240-245 Prince Georges Bowie
240-246 Montgomery Gaithersburg
240-247 Prince Georges Brentwood
240-248 Saint Marys Ridge
240-249 Saint Marys Charlotte Hall
240-250 Prince Georges Brandywine
240-251 Washington Cascade
240-252 Montgomery Gaithersburg
240-253 Prince Georges Cheltenham
240-254 Charles Hughesville

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