Cities in area code 240
Area code 240 serves 63 localities in Maryland, led by Washington Zone 03, Washington Zone 02, Washington Zone 10. The table lists every rate center — the billing locality each prefix is anchored to — with its share of the code's 785 active prefixes.
Ranked by active prefixes, the code's territory runs through Washington Zone 03, Washington Zone 02, Washington Zone 10, Frederick, Gaithersburg, Laurel 236, Hagerstown and Washington Zone 04, and 54 smaller communities down to single-prefix localities.
Metropolitan coverage: 42 rate centers belong to FCC top-100 metro areas.
Overlap note: 63 localities are shared with other area codes, so a neighbor's number may differ in its first three digits.
Clock-wise the coverage is Eastern.
A caller's real location can differ: numbers port between carriers and follow their owners when they move. Use the prefix tables to see where a specific number block was issued.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Washington Zone 03 | 73 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 02 | 64 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 10 | 54 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Frederick | 43 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Gaithersburg | 40 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Laurel 236 | 39 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Hagerstown | 33 | — | 227, 240, 301 |
| Washington Zone 04 | 30 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 05 | 28 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Waldorf | 26 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Ashton 236 | 25 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington 236 Zone 13 | 18 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 11 | 17 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Leonardtown | 17 | — | 227, 240, 301 |
| Laurel 238 | 16 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Cumberland | 16 | — | 227, 240, 301 |
| Washington 236 Zone 14 | 14 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 06 | 13 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Lexington Park Great Mills | 12 | — | 240, 301 |
| Myersville | 11 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 16 | 11 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington Zone 12 | 10 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Damascus 236 | 9 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Hughesville | 9 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| La Plata | 8 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Brandywine | 8 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Washington 236 Zone 15 | 8 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Mechanicsville | 7 | — | 227, 240, 301 |
| Ridge | 6 | — | 227, 240, 301 |
| Indian Head | 6 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Oakland | 6 | — | 227, 240, 301 |
| Poolesville | 6 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Tompkinsville | 6 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Nanjemoy | 5 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Ashton 238 | 5 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Buckeystown | 5 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Mount Airy | 5 | Baltimore-Columbia-Towson, MD | 227, 240, 301 |
| Highfield | 4 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Damascus 240 | 4 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Frostburg | 4 | — | 240, 301 |
| Hancock | 4 | — | 240, 301 |
| Middletown | 4 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Washington 238 Zone 14 | 4 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Washington 238 Zone 13 | 4 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Grantsville | 3 | — | 227, 240, 301 |
| Thurmont | 3 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Clear Spring | 3 | — | 240, 301 |
| Emmitsburg | 3 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| McCoole | 3 | — | 227, 240, 301 |
| Williamsport | 3 | — | 240, 301 |
| Keedysville | 3 | — | 227, 240, 301 |
| Smithsburg | 3 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Walkersville | 3 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| New Market | 3 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Flintstone | 2 | — | 227, 240, 301 |
| Friendsville | 2 | — | 227, 240, 301 |
| Bittinger | 2 | — | 227, 240, 301 |
| Kitzmiller | 2 | — | 240, 301 |
| Brunswick | 2 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 240, 301 |
| Washington 238 Zone 15 | 2 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 227, 240, 301 |
| Lonaconing | 2 | — | 240, 301 |
| Westernport | 2 | — | 227, 240, 301 |
| Mount Savage | 2 | — | 240, 301 |
FAQ
What is the biggest city in area code 240?
Washington Zone 03 holds the most active prefixes (73), making it the code's largest numbering locality.
How many places does 240 cover?
63 rate centers in Maryland hold active 240 prefixes, from Washington Zone 03 down to communities with a single prefix.
Does a 240 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.