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 |
| 603-257
| 6 |
Plaistow |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-05-16 |
|
| 603-257
| 7 |
Plaistow |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2007-05-04 |
|
| 603-257
| 9 |
Plaistow |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-258
| A |
Hollis |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
|
|
| 603-258
| 0 |
Hollis |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-02-15 |
|
| 603-258
| 1 |
Hollis |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2023-07-02 |
|
| 603-258
| 5 |
Hollis |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2026-01-22 |
|
| 603-258
| 7 |
Hollis |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2026-01-30 |
|
| 603-258
| 8 |
Hollis |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2023-09-08 |
|
| 603-258
| 9 |
Hollis |
NH |
|
5562 METROPCS, INC. |
122 |
|
2017-06-05 |
|
| 603-259
| A |
Littleton |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-259
| 0 |
Littleton |
NH |
|
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2004-10-09 |
|
| 603-259
| 1 |
Littleton |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-09-15 |
|
| 603-259
| 2 |
Littleton |
NH |
|
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2002-09-19 |
|
| 603-259
| 3 |
Littleton |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-10-12 |
|
| 603-259
| 4 |
Littleton |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-259
| 6 |
Littleton |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-12-04 |
|
| 603-259
| 7 |
Littleton |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2007-01-05 |
|
| 603-259
| 8 |
Littleton |
NH |
|
073H TELNYX LLC |
122 |
|
2024-06-30 |
|
| 603-260
| A |
Derry |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-260
| 0 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-03-01 |
|
| 603-260
| 1 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-05-01 |
|
| 603-260
| 2 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-08-01 |
|
| 603-260
| 3 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-06-01 |
|
| 603-260
| 4 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-03-01 |
|
| 603-260
| 5 |
Derry |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2013-06-01 |
|
| 603-260
| 6 |
Derry |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2014-09-05 |
|
| 603-260
| 7 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2016-10-01 |
|
| 603-260
| 8 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-12-07 |
|
| 603-260
| 9 |
Derry |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2014-12-14 |
|
| 603-261
| A |
Merrimack |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-261
| 0 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2008-12-15 |
|
| 603-261
| 1 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2008-12-15 |
|
| 603-261
| 2 |
Merrimack |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2010-09-27 |
|
| 603-261
| 3 |
Merrimack |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2013-11-20 |
|
| 603-261
| 4 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2014-11-06 |
|
| 603-261
| 5 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-261
| 6 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-261
| 7 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-261
| 8 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-261
| 9 |
Merrimack |
NH |
|
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-262
| A |
Merrimack |
NH |
MRMCNHYADS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-262
| 0 |
Merrimack |
NH |
|
5562 METROPCS, INC. |
122 |
|
2008-12-15 |
|
| 603-262
| 1 |
Merrimack |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-09-15 |
|
| 603-262
| 2 |
Merrimack |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2001-09-10 |
|
| 603-262
| 3 |
Merrimack |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2004-09-04 |
|
| 603-262
| 4 |
Merrimack |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2004-04-11 |
|
| 603-262
| 5 |
Merrimack |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2006-10-31 |
|
| 603-262
| 6 |
Merrimack |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-262
| 7 |
Merrimack |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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