Local Calling Guide
Area code/prefix search
NPA: 603
[Rate centres in NPA 603]
[Dial plan for NPA 603]
NXX: 457
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 603-457
| A |
Dover |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
|
|
| 603-457
| 0 |
Dover |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-457
| 1 |
Dover |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-457
| 2 |
Dover |
NH |
|
314C IDT AMERICA, CORP. - NH |
122 |
|
2021-01-18 |
|
| 603-457
| 3 |
Dover |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-457
| 4 |
Dover |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2021-03-25 |
|
| 603-457
| 5 |
Dover |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-457
| 6 |
Dover |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-457
| 7 |
Dover |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2021-05-07 |
|
| 603-457
| 8 |
Dover |
NH |
|
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2021-05-01 |
|
| 603-457
| 9 |
Dover |
NH |
|
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2021-01-19 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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