Local Calling Guide
Area code/prefix search
NPA: 603
[Rate centres in NPA 603]
[Dial plan for NPA 603]
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| 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 |
|
| 603-458
| A |
Salem |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-458
| 0 |
Salem |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2022-09-29 |
|
| 603-458
| 1 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-458
| 2 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-458
| 3 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2022-09-21 |
|
| 603-458
| 4 |
Salem |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2023-06-12 |
|
| 603-458
| 5 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-458
| 6 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2011-03-04 |
|
| 603-458
| 7 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2012-06-03 |
|
| 603-458
| 8 |
Salem |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2022-09-28 |
|
| 603-458
| 9 |
Salem |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2022-09-21 |
|
| 603-459
| A |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-459
| 0 |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-459
| 1 |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-459
| 2 |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-459
| 3 |
Nashua |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2005-07-02 |
|
| 603-459
| 4 |
Nashua |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2005-05-02 |
|
| 603-459
| 5 |
Nashua |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-11-02 |
|
| 603-459
| 6 |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-459
| 8 |
Nashua |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2005-04-15 |
|
| 603-459
| 9 |
Nashua |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2005-04-01 |
|
| 603-460
| A |
Deerfield |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-460
| 1 |
Deerfield |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-12-28 |
|
| 603-460
| 2 |
Deerfield |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-08-30 |
|
| 603-460
| 4 |
Deerfield |
NH |
|
996E BANDWIDTH.COM CLEC, LLC - NH |
122 |
|
2002-09-10 |
|
| 603-460
| 5 |
Deerfield |
NH |
|
996E BANDWIDTH.COM CLEC, LLC - NH |
122 |
|
2016-04-08 |
|
| 603-460
| 7 |
Deerfield |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2025-10-03 |
|
| 603-460
| 9 |
Deerfield |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-461
| A |
Merrimack |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-461
| 0 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2017-01-21 |
|
| 603-461
| 1 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2008-12-15 |
|
| 603-461
| 2 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-461
| 3 |
Merrimack |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2023-07-10 |
|
| 603-461
| 4 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2014-12-18 |
|
| 603-461
| 5 |
Merrimack |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2023-05-08 |
|
| 603-461
| 6 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-461
| 8 |
Merrimack |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2023-08-20 |
|
| 603-461
| 9 |
Merrimack |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2023-12-08 |
|
| 603-462
| A |
Deerfield |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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