240 Area Code – Location, Time Zone & Zip Codes

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📞 240 Area Code — Quick Reference
📍 LocationGermantown, Maryland
🕐 Time ZoneEastern (UTC-5/UTC-4)
🗓️ StatusActive — Geographic

The 240 area code covers Germantown, Maryland. Whether you received an unexpected call from this number or you’re trying to figure out where a 240 number is based, this guide covers the exact location, time zone, spam reputation, blocking instructions, and which cities fall under this code.

📍 Where Is the 240 Area Code Located?

The 240 area code is located in Maryland, primarily serving Germantown and the surrounding region. It’s a standard geographic area code under the North American Numbering Plan (NANP). Keep in mind that mobile number portability means someone could carry a 240 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

240 Area Code — Location Details
State/ProvinceMaryland (MD)
Major CityGermantown
CountryUnited States (+1)
Time ZoneEastern (UTC-5/UTC-4)
TypeGeographic — Standard
NANPA StatusActive

🕐 240 Area Code Time Zone

The 240 area code operates in the Eastern Time Zone (UTC-5/UTC-4). Here’s how it compares to other US time zones:

Time ZoneDifference from 240
Eastern TimeSame time
Central Time-1 hour
Mountain Time-2 hours
Pacific Time-3 hours
💡 Calling Tip: Reach someone in the 240 area between 10 AM – 4 PM their local time for the best chance of an answer. Calls outside those hours are more likely to be screened or ignored.

🛡️ Is 240 Area Code Spam or Scam?

Like most US area codes, 240 is used by both legitimate callers and scammers. The code itself is perfectly real — millions of people and businesses in Germantown use it daily. But scammers frequently spoof 240 numbers because local-looking calls get answered more often than unfamiliar ones.

⚠️ Red Flag: If a 240 caller demands immediate payment via gift cards, wire transfer, or crypto — hang up. No legitimate organization uses these methods. Verify by calling the company’s official number directly.

How to verify: Don’t call back the number — look up the official number for whatever organization the caller claimed to represent and call that instead. Google the full 10-digit number in quotes to check if others have reported it as spam.

📵 How to Block 240 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 240 spam number
  3. Scroll down → “Block this Caller”
  4. Silence all unknowns: Settings → Phone → Silence Unknown Callers → ON

Block on Android

  1. Open Phone → find the 240 number
  2. Tap ⋮ menu → “Block number”
  3. For broader blocking: Settings → Blocked numbers → Unknown toggle ON

Report Spam

  1. Forward spam texts to 7726 (SPAM)
  2. Report at reportfraud.ftc.gov
  3. Register at donotcall.gov or call 1-888-382-1222

🔍 Who Called from 240? Reverse Lookup

  1. Google the full 10-digit number in quotes — catches ~70% of unknown callers
  2. Check Whitepages.com or Truecaller.com
  3. Search 800notes.com for community reports
  4. No voicemail left? Almost certainly spam — legitimate callers leave messages
⚠️ One-Ring Scam: If a 240 number rings once and hangs up, do NOT call back. This scam connects you to a premium-rate line that charges your bill.

🔗 Nearby Area Codes

CodeLocationTime Zone
301Silver Spring, MarylandEastern
443Baltimore, MarylandEastern
410Baltimore, MarylandEastern
667Baltimore, MarylandEastern

❓ 240 Area Code — FAQ

What state is 240 area code in?
The 240 area code is in Maryland, serving Germantown and surrounding areas.
What city does 240 cover?
240 primarily covers Germantown and nearby communities in Maryland.
Is 240 toll-free?
No. 240 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 240?
Eastern (UTC-5/UTC-4).
Is 240 a scam?
240 is legitimate — it serves real people in Germantown. But scammers may spoof 240 numbers. Verify suspicious callers independently.
Why do I keep getting 240 calls?
Repeated 240 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 240 number remotely?
Yes — VoIP services like Google Voice offer 240 numbers regardless of where you live.
Is 240 cell or landline?
240 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 240 calls?
iPhone: Settings → Phone → Silence Unknown Callers. Android: Phone → Settings → Blocked numbers. For area-code blocking, use Truecaller or RoboKiller.

🔗 Related Area Code Guides

Updated April 2026 · Data from NANPA & FCC · areacodess.org/