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 |
| 603-317
| 8 |
Milan |
NH |
|
5562 METROPCS, INC. |
122 |
|
2025-12-05 |
|
| 603-317
| 9 |
Milan |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-318
| A |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-318
| 0 |
Nashua |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
|
|
| 603-318
| 1 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2004-04-07 |
|
| 603-318
| 2 |
Nashua |
NH |
MNCHNHCOXCZ |
996E BANDWIDTH.COM CLEC, LLC - NH |
122 |
|
|
|
| 603-318
| 3 |
Nashua |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-318
| 4 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-05-01 |
|
| 603-318
| 5 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2004-04-07 |
|
| 603-318
| 6 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-08-02 |
|
| 603-318
| 7 |
Nashua |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-09 |
|
| 603-318
| 8 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-02-03 |
|
| 603-318
| 9 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-02-25 |
|
| 603-319
| A |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-319
| 0 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-319
| 1 |
Portsmouth |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-04-23 |
|
| 603-319
| 2 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-319
| 3 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-319
| 4 |
Portsmouth |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-04-23 |
|
| 603-319
| 5 |
Portsmouth |
NH |
MNCHNHCOXCZ |
996E BANDWIDTH.COM CLEC, LLC - NH |
122 |
|
2006-06-22 |
|
| 603-319
| 6 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2013-10-03 |
|
| 603-319
| 7 |
Portsmouth |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2011-03-02 |
|
| 603-319
| 8 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2008-01-22 |
|
| 603-320
| A |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 0 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 1 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 2 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 3 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 4 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 5 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 6 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 7 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 8 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-320
| 9 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2007-10-22 |
|
| 603-321
| A |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-322
| A |
West Lebanon |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-322
| 0 |
West Lebanon |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2022-06-16 |
|
| 603-322
| 1 |
West Lebanon |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-05-30 |
|
| 603-322
| 3 |
West Lebanon |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-322
| 5 |
West Lebanon |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2023-04-25 |
|
| 603-322
| 8 |
West Lebanon |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2017-01-14 |
|
| 603-323
| A |
Tamworth |
NH |
TMWONHWHRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-323
| 0 |
Tamworth |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-09-12 |
|
| 603-323
| 2 |
Tamworth |
NH |
TMWONHWHRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-323
| 4 |
Tamworth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2021-05-28 |
|
| 603-323
| 5 |
Tamworth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2023-04-27 |
|
| 603-323
| 6 |
Tamworth |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-323
| 7 |
Tamworth |
NH |
TMWONHWHRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-323
| 8 |
Tamworth |
NH |
TMWONHWHRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-323
| 9 |
Tamworth |
NH |
TMWONHWHRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
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Last updated: Tue, 16 Jun 2026 00:09:45 UTC
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