Area code 340 – U.S. Virgin Islands
340 has served U.S. Virgin Islands since 1997, split from 809. It is still largely empty: 58 of 786 number blocks allocated. Other CLEC / VoIP holds 74.1% of those blocks, which is unusually concentrated for a US area code.
- State
- U.S. Virgin Islands
- In service since
- 1997
- Time zone
- Atlantic
- Shares area with
- No overlay
Who holds 340 number blocks
Share of the 58 assigned NXX blocks (7.4% of the 786 possible), across 11 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP53.4%
- Liberty27.6%
- T-Mobile13.8%
- Telnyx1.7%
- AT&T1.7%
- Comcast1.7%
Rate centers in 340
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names.
Timeline
- 1997 340 goes into service, split from or overlaid on 809.
More about 340
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 340
What state is area code 340?
U.S. Virgin Islands.
Which carrier owns 340 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 74.1%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 340?
No. NANPA records 340 as 7-digit dialing for local calls.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “7D”. Reviewed by the data desk. Spotted an error? Request a correction.