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Area Code 240

 

Maryland area code 240 has been in service since 1997. It has 250 landlines and 125 wireless prefixes (exchanges) serviced by 40 carriers. It covers 11 counties, 501 ZIP codes, and 56 cities, including Gaithersburg, Laurel, Hyattsville, Rockville, Silver Spring, Germantown, Waldorf, Montgomery Village, and Bowie.

State:
Maryland
Time Zone:
Eastern (12:35 am)

Area Code (240) has 375 prefixes

Prefix County City Company/Carrier Line Type
(240) 205- Montgomery Rockville New Cingular Wireless Pcs,... Cell Phone
(240) 206- Prince Georges Bowie Xo Maryland, Llc Landline
(240) 207- Montgomery Damascus Cavalier East Llc - Md Landline
(240) 209- Howard Columbia Global Naps South, Inc. - Md Landline
(240) 210- Charles Waldorf New Cingular Wireless Pcs,... Cell Phone
(240) 214- Adams Gettysburg Global Naps South, Inc. - Md Landline
(240) 215- Frederick Frederick Telcove Operations, Inc. - Md Landline
(240) 216- Charles Waldorf Nextel Communications, Inc. Cell Phone
(240) 217- Washington Hagerstown Omnipoint Communications Ca... Cell Phone
(240) 221- Montgomery Rockville Verizon Maryland, Inc. Landline
(240) 222- Charles Waldorf Cavalier Telephone Mid-atla... Landline
(240) 223- Montgomery Bethesda Allegiance Telecom, Inc. - Md Landline
(240) 228- Howard Laurel Verizon Maryland, Inc. Landline
(240) 229- Charles Waldorf Broadwing Communications. L... Landline
(240) 230- Charles La Plata Global Crossing Local Servi... Landline
(240) 232- Prince Georges Bowie Broadwing Communications. L... Landline
(240) 233- Charles Newburg Teleport Communications Gro... Landline
(240) 235- Montgomery Chevy Chase Paetec Communications, Inc.... Landline
(240) 236- Frederick Frederick Verizon Maryland, Inc. Landline
(240) 237- Saint Marys Lexington Park Teleport Communications Gro... Landline
(240) 238- Montgomery Rockville Paetec Communications, Inc.... Landline
(240) 241- Prince Georges Beltsville Starpower Communications, L... Landline
(240) 242- Montgomery Silver Spring Starpower Communications, L... Landline
(240) 243- Montgomery Gaithersburg Allegiance Telecom, Inc. - Md Landline
(240) 244- Prince Georges Clinton Starpower Communications, L... Landline
(240) 245- Prince Georges Bowie Starpower Communications, L... Landline
(240) 246- Montgomery Gaithersburg Starpower Communications, L... Landline
(240) 247- Montgomery Silver Spring Allegiance Telecom, Inc. - Md Landline
(240) 248- District Of Columbia Washington Global Naps South, Inc. - Md Landline
(240) 249- Saint Marys Mechanicsville Teleport Communications Gro... Landline
(240) 250- Montgomery Gaithersburg Global Naps South, Inc. - Md Landline
(240) 252- Montgomery Germantown Level 3 Communications, Llc... Landline
(240) 253- Prince Georges Oxon Hill Global Crossing Local Servi... Landline
(240) 254- Charles Hughesville Teleport Communications Gro... Landline
(240) 256- Fairfax Fairfax Teleport Communications Gro... Landline
(240) 258- Saint Marys Saint Inigoes Teleport Communications Gro... Landline
(240) 260- Prince Georges Hyattsville Allegiance Telecom, Inc. - Md Landline
(240) 263- Prince Georges Upper Marlboro Tidalwave Telephone Inc. Landline
(240) 264- Prince Georges Laurel Verizon Maryland, Inc. Landline
(240) 265- Prince Georges Laurel Tidalwave Telephone Inc. Landline
(240) 268- Montgomery Rockville Allegiance Telecom, Inc. - Md Landline
(240) 271- Montgomery Silver Spring New Cingular Wireless Pcs,... Cell Phone
(240) 273- Prince Georges Fort Washington Broadwing Communications. L... Landline
(240) 274- Prince Georges Oxon Hill New Cingular Wireless Pcs,... Cell Phone
(240) 276- Montgomery Rockville Verizon Maryland, Inc. Landline
(240) 277- Montgomery Silver Spring Sprint Spectrum L.p. Cell Phone
(240) 280- Prince Georges Laurel Comcast Phone Of Northern M... Landline
(240) 281- Prince Georges Hyattsville New Cingular Wireless Pcs,... Cell Phone
(240) 282- Frederick Middletown Global Naps South, Inc. - Md Landline
(240) 283- Montgomery Rockville Paetec Communications, Inc.... Landline
(240) 284- Allegany Frostburg Nationsline, Inc. - Md Landline
(240) 285- Frederick Frederick Cellco Partnership Dba Veri... Cell Phone
(240) 286- District Of Columbia Washington Nextel Communications, Inc. Cell Phone
(240) 288- Frederick Thurmont Nationsline, Inc. - Md Landline
(240) 289- Prince Georges Oxon Hill Cavalier Telephone Mid-atla... Landline
(240) 290- Montgomery Rockville Allegiance Telecom, Inc. - Md Landline
(240) 291- Washington Hagerstown New Cingular Wireless Pcs,... Cell Phone
(240) 292- Montgomery Silver Spring Verizon Maryland, Inc. Landline
(240) 293- Montgomery Silver Spring Starpower Communications, L... Landline
(240) 294- Prince Georges Laurel Xo Maryland, Llc Landline
(240) 295- Prince Georges Laurel Cavalier Telephone Mid-atla... Landline
(240) 296- Prince Georges Hyattsville Cavalier Telephone Mid-atla... Landline
(240) 297- Prince Georges Greenbelt Level 3 Communications, Llc... Landline
(240) 298- Saint Marys Hollywood Cellco Partnership Dba Veri... Cell Phone
(240) 299- Charles Waldorf Nextel Communications, Inc. Cell Phone
(240) 303- Prince Georges Clinton Cavalier Telephone Mid-atla... Landline
(240) 304- Prince Georges District Heights Nextel Communications, Inc. Cell Phone
(240) 305- Montgomery Silver Spring Sprint Spectrum L.p. Cell Phone
(240) 306- Montgomery Rockville Allegiance Telecom, Inc. - Md Landline
(240) 307- Frederick Emmitsburg At&t Local Landline
(240) 308- District Of Columbia Washington New Cingular Wireless Pcs,... Cell Phone
(240) 310- Washington Hagerstown Uscoc Of Cumberland, Inc. D... Landline
(240) 312- Prince Georges Capitol Heights Cavalier Telephone Mid-atla... Landline
(240) 313- Washington Hagerstown Verizon Maryland, Inc. Landline
(240) 314- Montgomery Rockville Verizon Maryland, Inc. Landline
(240) 315- Frederick Frederick Verizon Maryland, Inc. Landline
(240) 317- Saint Marys Lexington Park Starpower Communications, L... Landline
(240) 318- Prince Georges Clinton Verizon Maryland, Inc. Landline
(240) 320- District Of Columbia Washington Cavalier East Llc - Md Landline
(240) 321- Garrett Swanton Uscoc Of Cumberland, Inc. D... Landline
(240) 326- Prince Georges Upper Marlboro Cavalier Telephone Mid-atla... Landline
(240) 328- Montgomery Rockville Verizon Maryland, Inc. Landline
(240) 329- Washington Hagerstown Level 3 Communications, Llc... Landline
(240) 330- Montgomery Germantown Sprint Spectrum L.p. Cell Phone
(240) 332- Montgomery Silver Spring Global Naps South, Inc. - Md Landline
(240) 333- Montgomery Bethesda Cavalier East Llc - Md Landline
(240) 334- Prince Georges Bowie Global Crossing Local Servi... Landline
(240) 335- Prince Georges Lanham Cavalier Telephone Mid-atla... Landline
(240) 337- Orange Newport Beach Global Naps South, Inc. - Md Landline
(240) 338- Prince Georges Bowie Cellco Partnership Dba Veri... Cell Phone
(240) 339- Prince Georges Upper Marlboro Cavalier East Llc - Md Landline
(240) 342- Montgomery Olney Starpower Communications, L... Landline
(240) 344- Frederick Frederick New Cingular Wireless Pcs,... Cell Phone
(240) 345- Howard Highland Level 3 Communications, Llc... Landline
(240) 346- Charles Waldorf Sprint Spectrum L.p. Cell Phone
(240) 348- Prince Georges Clinton Level 3 Communications, Llc... Landline
(240) 349- Charles La Plata Global Crossing Local Servi... Landline
(240) 350- Prince Georges Bowie Sprint Spectrum L.p. Cell Phone
(240) 351- Montgomery Silver Spring Sprint Spectrum L.p. Cell Phone
(240) 353- Montgomery Silver Spring Sprint Spectrum L.p. Cell Phone