Active Prefixes in Area Code 340

- 340-777
- Chtamstths, United States
- 340-422
- Chtamstths, United States
- 340-712
- Chnstdstcr, United States
- 340-625
- Frkstdstcr, United States
- 340-642
- Chtamstths, United States
- 340-715
- Chtamstths, United States
- 340-770
- Chtamstths, United States
- 340-884
- Chtamstths, United States
- 340-998
- Chtamstths, United States
- 340-771
- Chtamstths, United States
- 340-344
- Chtamstths, United States
- 340-727
- Chtamstths, United States
- 340-444
- Chtamstths, United States
- 340-779
- Chtamstths, United States
- 340-226
- St Croix, United States
- 340-473
- Chtamstths, United States
- 340-220
- Chnstdstcr, United States
- 340-717
- Chtamstths, United States
- 340-202
- St Croix, United States
- 340-778
- Chtamstths, United States
- 340-725
- Chtamstths, United States
- 340-713
- Chnstdstcr, United States
- 340-277
- St Croix, United States
- 340-626
- Chtamstths, United States
- 340-677
- Chtamstths, United States
- 340-489
- Chnstdstcr, United States
- 340-775
- Chtamstths, United States
- 340-332
- St Croix, United States
- 340-773
- Chnstdstcr, United States
- 340-718
- Chnstdstcr, United States
- 340-228
- Chtamstths, United States
- 340-690
- Chtamstths, United States
- 340-514
- Chtamstths, United States
- 340-693
- Chtamstths, United States
- 340-249
- Chtamstths, United States
- 340-714
- Chtamstths, United States
- 340-244
- Chtamstths, United States
- 340-201
- Chtamstths, United States
- 340-474
- Chtamstths, United States
- 340-719
- Chnstdstcr, United States
- 340-774
- Chtamstths, United States
- 340-555
- Chtamstths, United States
- 340-643
- Chtamstths, United States
- 340-772
- Frkstdstcr, United States
- 340-227
- Chtamstths, United States
- 340-776
- Chtamstths, United States
- 340-423
- Chtamstths, United States
- 340-692
- St Croix, United States
- 340-513
- Chtamstths, United States