240 area code: location, overlays and numbers
Area code 240 serves Washington, Maryland as a US telephone code that has operated since 1997 and shares an overlay with 301 and 227.
- Location
- Washington, Maryland
- Since service began
- 1997
- Local time zone
- Eastern time
- Calls within the area
- Full 10-digit dialling
- Rate centre locations
- 51
- Projected exhaustion
- 2041
- Calling code for the country
- +1 (United States)
Our figures come from NANPA public reports: the area code report along with the rate-centre report, in a file dated 11/01/2026. The exhaust year is taken from the NANPA 2026-1 projections, published April 2026. This site is not an official NANPA site.
Get your own 240 number
You can get a 240 number in two ways. With its plan, a provider assigns a new number selected at sign-up from those it holds in the code. A seller posts numbers from its current stock, often with a pattern, at a one-time price. You then transfer the number to a provider.
Providers ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers offering listed local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
We may receive a referral fee from certain sellers and providers. The order always reflects first-year cost, regardless of referral fees. How we earn
Places in the 240 area code
For 240, NANPA lists 51 rate centres. Numbers are assigned to each of these local calling areas:
Washington, Washington 236, Washington 238, Williamsport, Westernport, Walkersville, Waldorf, Tompkinsville, Thurmont, Smithsburg, Ridge, Poolesville, Oakland, New Market, Nanjemoy, Myersville, Mount Savage, Mount Airy, Middletown, Mechanicsville, Mccoole, Lexington Park Great Mills, Lonaconing, Leonardtown, Laurel 238, Laurel 236, La Plata, Kitzmiller, Keedysville, Indian Head, Hughesville, Highfield, Hancock, Hagerstown, Grantsville, Gaithersburg, Frostburg, Friendsville, Frederick, Flintstone, Emmitsburg, Damascus 240, Damascus 236, Cumberland, Clear Spring, Buckeystown, Brunswick, Brandywine, Bittinger, Ashton 238, Ashton 236.
Other related area codes
One area and one pool of numbers are shared by 301 and 227. Any of these codes can supply a new number in this area, so ask for the one you want.
240 area code questions
What area is code 240 in?
In Washington, Maryland, 240 rings around metro Washington-Arlington-Alexandria, DC-VA-MD-WV.
Which country code belongs to a 240 number?
+1. Because 240 belongs to the North American Numbering Plan, calls from abroad use +1 240 followed by the 7-digit number.
What time is it in the 240 area code?
Area code 240 observes Eastern time.
Who calls using a 240 number?
The code covers homes, mobiles and local businesses, and also callers who pretend their number is local. The 240 displayed on your screen identifies where the number was assigned; it does not identify the caller.