Local Calling Guide
Area code/prefix search
NPA: 475
[Rate centres in NPA 475]
[Dial plan for NPA 475]
NXX: 387
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 475-387
| A |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2025-03-24 |
|
| 475-387
| 0 |
New Haven |
CT |
PTNMCT00AMD |
732J NUSO, LLC |
920 |
|
2025-04-28 |
|
| 475-387
| 1 |
New Haven |
CT |
HRFRCTASBMD |
6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
920 |
|
2025-04-11 |
|
| 475-387
| 2 |
New Haven |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
2026-08-17 |
|
| 475-387
| 3 |
New Haven |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
2026-08-17 |
|
| 475-387
| 4 |
New Haven |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
2026-08-17 |
|
| 475-387
| 5 |
New Haven |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
2026-08-17 |
|
| 475-387
| 6 |
New Haven |
CT |
PTNMCT00AMD |
732J NUSO, LLC |
920 |
|
2025-04-28 |
|
| 475-387
| 7 |
New Haven |
CT |
|
639C ONVOY, LLC - CT |
920 |
|
2026-08-17 |
|
| 475-387
| 8 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2025-03-24 |
|
| 475-387
| 9 |
New Haven |
CT |
MDTWCTNIBMD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
920 |
|
2025-03-24 |
|
Last updated: Tue, 01 Sep 2026 00:40:05 UTC
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