340 Area Code – Location, Time Zone & Zip Codes

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📞 340 Area Code — Quick Reference
📍 LocationSt. Thomas, US Virgin Islands
🕐 Time ZoneAtlantic (UTC-4)
🗓️ StatusActive — Geographic

The 340 area code covers St. Thomas, US Virgin Islands. Whether you received an unexpected call from this number or you’re trying to figure out where a 340 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 340 Area Code Located?

The 340 area code is located in US Virgin Islands, primarily serving St. Thomas 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 340 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

340 Area Code — Location Details
State/ProvinceUS Virgin Islands (VI)
Major CitySt. Thomas
CountryUnited States (+1)
Time ZoneAtlantic (UTC-4)
TypeGeographic — Standard
NANPA StatusActive

🕐 340 Area Code Time Zone

The 340 area code operates in the Atlantic Time Zone (UTC-4). Here’s how it compares to other US time zones:

Time ZoneDifference from 340
Eastern Time-1 hour
Central Time-2 hours
Mountain Time-3 hours
Pacific Time-4 hours
💡 Calling Tip: Reach someone in the 340 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 340 Area Code Spam or Scam?

Like most US area codes, 340 is used by both legitimate callers and scammers. The code itself is perfectly real — millions of people and businesses in St. Thomas use it daily. But scammers frequently spoof 340 numbers because local-looking calls get answered more often than unfamiliar ones.

⚠️ Red Flag: If a 340 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 340 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 340 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 340 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 340? 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 340 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

❓ 340 Area Code — FAQ

What state is 340 area code in?
The 340 area code is in US Virgin Islands, serving St. Thomas and surrounding areas.
What city does 340 cover?
340 primarily covers St. Thomas and nearby communities in US Virgin Islands.
Is 340 toll-free?
No. 340 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 340?
Atlantic (UTC-4).
Is 340 a scam?
340 is legitimate — it serves real people in St. Thomas. But scammers may spoof 340 numbers. Verify suspicious callers independently.
Why do I keep getting 340 calls?
Repeated 340 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 340 number remotely?
Yes — VoIP services like Google Voice offer 340 numbers regardless of where you live.
Is 340 cell or landline?
340 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 340 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/