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 |
| 603-374
| 8 |
Bartlett |
NH |
MNCHNHCO45Z |
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 |
MNCHNHCOX9Z |
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 |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
|
|
| 603-377
| 7 |
Merrimack |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2012-04-30 |
|
| 603-377
| 8 |
Merrimack |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-11-13 |
|
| 603-377
| 9 |
Merrimack |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-08-21 |
|
| 603-378
| A |
Plaistow |
NH |
PLSTNHMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-378
| 0 |
Plaistow |
NH |
PLSTNHMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-378
| 1 |
Plaistow |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2025-01-23 |
|
| 603-378
| 2 |
Plaistow |
NH |
PLSTNHMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-378
| 3 |
Plaistow |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2021-12-12 |
|
| 603-378
| 5 |
Plaistow |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2016-11-07 |
|
| 603-378
| 8 |
Plaistow |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2022-12-23 |
|
| 603-378
| 9 |
Plaistow |
NH |
PLSTNHMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-379
| A |
Rye Beach |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-379
| 0 |
Rye Beach |
NH |
MNCHNHCO47Z |
829J PAETEC ITEL, LLC |
122 |
|
2001-03-27 |
|
| 603-379
| 1 |
Rye Beach |
NH |
MNCHNHCO47Z |
829J PAETEC ITEL, LLC |
122 |
|
2000-05-24 |
|
| 603-379
| 2 |
Rye Beach |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2001-06-28 |
|
| 603-379
| 3 |
Rye Beach |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2001-04-02 |
|
| 603-379
| 5 |
Rye Beach |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2019-06-18 |
|
| 603-379
| 6 |
Rye Beach |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2004-09-07 |
|
| 603-379
| 8 |
Rye Beach |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-10-31 |
|
| 603-379
| 9 |
Rye Beach |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2015-02-16 |
|
| 603-380
| A |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 0 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 1 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 2 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 3 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 4 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 5 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 6 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-380
| 7 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2015-10-09 |
|
| 603-380
| 8 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2010-09-11 |
|
| 603-380
| 9 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2015-08-13 |
|
| 603-381
| A |
West Lebanon |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-381
| 0 |
West Lebanon |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-381
| 1 |
West Lebanon |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-381
| 2 |
West Lebanon |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
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Last updated: Tue, 01 Sep 2026 00:40:05 UTC
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