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 |
| 603-371
| 4 |
Peterborough |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2002-09-19 |
|
| 603-371
| 5 |
Peterborough |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2005-01-24 |
|
| 603-371
| 7 |
Peterborough |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2021-05-27 |
|
| 603-371
| 8 |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2006-05-03 |
|
| 603-371
| 9 |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2000-05-24 |
|
| 603-372
| A |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-372
| 0 |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-372
| 1 |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-372
| 2 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-05-03 |
|
| 603-372
| 3 |
Claremont |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2026-03-30 |
|
| 603-372
| 4 |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-372
| 5 |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-372
| 6 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-11-03 |
|
| 603-372
| 7 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-05-02 |
|
| 603-372
| 9 |
Claremont |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-373
| A |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-373
| 0 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2001-01-01 |
|
| 603-373
| 1 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-01 |
|
| 603-373
| 2 |
Portsmouth |
NH |
MNCHNHCO37Z |
7421 AT&T - LOCAL |
122 |
|
2001-07-01 |
|
| 603-373
| 3 |
Portsmouth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2021-05-27 |
|
| 603-373
| 4 |
Portsmouth |
NH |
MNCHNHCOX1Y |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2004-04-18 |
|
| 603-373
| 5 |
Portsmouth |
NH |
|
4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC |
122 |
|
|
|
| 603-373
| 6 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-373
| 7 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2005-08-05 |
|
| 603-373
| 8 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2003-02-04 |
|
| 603-373
| 9 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2000-07-03 |
|
| 603-374
| A |
Bartlett |
NH |
BRTLNHGERS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-374
| 0 |
Bartlett |
NH |
BRTLNHGERS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-374
| 1 |
Bartlett |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-08-07 |
|
| 603-374
| 2 |
Bartlett |
NH |
BRTLNHGERS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-374
| 3 |
Bartlett |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2009-01-05 |
|
| 603-374
| 4 |
Bartlett |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2014-09-10 |
|
| 603-374
| 5 |
Bartlett |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-374
| 6 |
Bartlett |
NH |
BRTLNHGERS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-374
| 7 |
Bartlett |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2004-09-03 |
|
| 603-374
| 8 |
Bartlett |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2007-12-06 |
|
| 603-374
| 9 |
Bartlett |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2023-01-04 |
|
| 603-375
| A |
Ashland |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
|
|
| 603-375
| 0 |
Ashland |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2024-07-22 |
|
| 603-375
| 3 |
Ashland |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2025-02-02 |
|
| 603-375
| 4 |
Ashland |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-376
| A |
Dover |
NH |
MNCHNHCO29Z |
9748 AMERICAN MESSAGING SERVICES, LLC |
122 |
|
|
|
| 603-377
| A |
Merrimack |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-377
| 0 |
Merrimack |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-377
| 1 |
Merrimack |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2016-11-19 |
|
| 603-377
| 2 |
Merrimack |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-08-07 |
|
| 603-377
| 3 |
Merrimack |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-01-15 |
|
| 603-377
| 4 |
Merrimack |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-08-28 |
|
| 603-377
| 5 |
Merrimack |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2023-08-26 |
|
| 603-377
| 6 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
|
|
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Last updated: Tue, 16 Jun 2026 00:09:45 UTC
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