Cities in area code 340
Which places use area code 340? 4 rate centers in U.S. Virgin Islands, the biggest being Chtamstths, St Croix, Chnstdstcr. Data below is NANPA's official prefix-to-rate-center mapping.
Chtamstths, St Croix, Chnstdstcr and Frkstdstcr hold the largest prefix inventories. Each locality below links to its rate-center page with the full prefix list.
Territory status changes nothing about the numbering: these U.S. Virgin Islands communities are standard NANP rate centers, dialed domestically from anywhere in the US.
All of the code's territory keeps Atlantic time.
Remember that people keep numbers when they relocate, so a 340 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Chtamstths | 42 | — | 340 |
| St Croix | 7 | — | 340 |
| Chnstdstcr | 7 | — | 340 |
| Frkstdstcr | 2 | — | 340 |
FAQ
What is the biggest city in area code 340?
Chtamstths holds the most active prefixes (42), making it the code's largest numbering locality.
How many places does 340 cover?
4 rate centers in U.S. Virgin Islands hold active 340 prefixes, from Chtamstths down to communities with a single prefix.
Does a 340 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.