Area code 240 — Germantown, Maryland

Where is area code 240?

Area code 240 is in Germantown, Maryland, covering Germantown and surrounding communities in Maryland. All 240 numbers are on Eastern Time.

Is area code 240 a scam?

No. Area code 240 is a legitimate area code serving Germantown since 1997. Scammers spoof caller ID to display 240 numbers, which is why complaints exist against a code that is itself genuine.

Neighbour spoofing is the reason a local-looking number is not a guarantee. A caller anywhere in the world can display a 240 number, and the number they display may belong to a real business in Germantown that has nothing to do with the call.

• ·Area code 240 had 415 different numbers reported for spam calls in the 30 days to 28 July 2026.
• ·Area code 240 ranks 166th of 331 US geographic area codes by spam complaint volume.
• ·Of the 465 complaints about area code 240 in the 30 days to 28 July 2026, 52% were reported as a recorded message or robocall.
• ·The most reported subject on area code 240 is calls pretending to be government, businesses, or family and friends, appearing in 17% of its complaints in the 30 days to 28 July 2026.

What these calls were about

Each figure is that subject’s share of every 240 complaint in the 30 days to 28 July 2026, as categorised by the consumer who reported it.

Businesses can prevent their own numbers from being mistaken for calls like these.

Why am I getting text messages from area code 240?

Texts from 240 numbers follow the same pattern as calls — mostly local businesses and services. Treat any text asking for payment or credentials as suspect regardless of the code.

The common patterns are a wrong-number opener that turns into conversation, an unsolicited job offer, and a crypto or investment tip. Do not reply, do not follow the link, and forward the message to 7726 (SPAM) to report it to your carrier.

Area codes that overlay 240

Area code 240 shares its geographic footprint with one other code: 301. Overlays are laid over an existing area rather than splitting it, so all local calls require the full ten-digit number.

Who works in the Germantown area?

Area code 240 covers Germantown and the rest of Maryland's Montgomery County corridor, one of the denser business geographies on the East Coast. Germantown sits about 28 miles from Washington, D.C. along Interstate 270, a stretch known for biotech firms, federal contractors, and Department of Energy offices, including the DOE facility in Germantown itself. The town is Maryland's third-largest community, with 91,249 residents at the 2020 census, and its economy leans on the federal government, life sciences labs clustered along the I-270 corridor, and the professional services firms that support both.

Who lives in the 240 region

The people behind the numbers skew educated and international. Median household income in Germantown was $117,546 in 2024, and 36.8% of residents were born outside the United States, per Data USA. Spanish, Chinese, and West African languages are all present in meaningful numbers across Montgomery County, so a business calling into the 240 region should not assume every conversation starts in English. Black, White, and Asian residents each make up roughly a fifth to a quarter of the population, which makes Germantown one of the more evenly mixed communities in the state.

What a 240 number signals to a caller

Business here runs on Washington time and Washington habits. Callers describe a professional, appointment-driven culture where voicemail gets screened and unknown numbers often go unanswered on the first attempt. A number in area code 240 or 301 signals a local Maryland presence to customers who deal daily with federal agencies and contractors, and that local signal matters in a market where out-of-area calls are treated with caution.

Questions