Connecticut Area Codes
Compare 4 in-service area codes assigned to Connecticut. Explore each code’s introduction date, overlays, possible time zones, and public prefix records.
Connecticut numbering at a glance
- In-service area codes
- 4
- Time-zone labels in NANPA data
- Eastern
- Listed in-service or assigned prefixes
- 2,009 · source dated 2026-09-29
These are numbering assignments. The counts do not represent active phone numbers, current carriers, or a caller’s physical location.
Compare area codes in Connecticut
| Code | Introduced | Other codes in overlay | Time zones | Listed prefixes |
|---|---|---|---|---|
| 203 | 01-Jan-1947 | 475 | Eastern | 784 |
| 475 | 12-Dec-2009 | 203 | Eastern | 283 |
| 860 | 28-Aug-1995 | 959 | Eastern | 782 |
| 959 | 30-Aug-2014 | 860 | Eastern | 160 |
Source: NANPA NPA database, dated 2026-09-28. Prefix counts: NANPA US assignment report. View official area-code maps.
Overlay groups in Connecticut
Codes in an overlay group can serve the same broad numbering area. A person may keep a number after moving, and the displayed number may be spoofed.
Find a number in Connecticut
Open an area-code page above to check a prefix and possible time zones. You can also search US telephone rate-center names; those names are not exact city coverage.
A code cannot verify the owner of a number. If an unexpected caller asks for money or sensitive information, verify the claim independently.