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 |
| 603-586
| 4 |
Jefferson |
NH |
JFSNNHYARS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-586
| 5 |
Jefferson |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2003-03-23 |
|
| 603-586
| 6 |
Jefferson |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-586
| 7 |
Jefferson |
NH |
JFSNNHYARS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-586
| 9 |
Jefferson |
NH |
JFSNNHYARS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
2014-06-20 |
|
| 603-587
| A |
Candia |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-587
| 0 |
Candia |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2000-07-01 |
|
| 603-587
| 1 |
Candia |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2019-03-14 |
|
| 603-587
| 2 |
Candia |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2012-12-10 |
|
| 603-587
| 3 |
Candia |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2023-09-06 |
|
| 603-587
| 4 |
Candia |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-01-15 |
|
| 603-587
| 7 |
Candia |
NH |
MNCHNHCO22Z |
073H TELNYX LLC |
122 |
|
2023-10-06 |
|
| 603-587
| 8 |
Candia |
NH |
MNCHNHCO47Z |
829J PAETEC ITEL, LLC |
122 |
|
2002-10-14 |
|
| 603-587
| 9 |
Candia |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-588
| A |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 0 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 2 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 3 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 4 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 5 |
Antrim |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2026-03-14 |
|
| 603-588
| 6 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-588
| 8 |
Antrim |
NH |
ANTRNHXARP0 |
3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY |
122 |
|
|
|
| 603-589
| A |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-589
| 0 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 1 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 2 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 3 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 4 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 5 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2006-12-30 |
|
| 603-589
| 6 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 7 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2007-07-20 |
|
| 603-589
| 8 |
Nashua |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-589
| 9 |
Nashua |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2012-04-24 |
|
| 603-590
| A |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 0 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 1 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 2 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 3 |
Durham |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2026-03-14 |
|
| 603-590
| 4 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 5 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 6 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 7 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 8 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-590
| 9 |
Durham |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-591
| A |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-591
| 0 |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-591
| 1 |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-591
| 2 |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-591
| 3 |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-591
| 4 |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
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Last updated: Tue, 01 Sep 2026 00:40:05 UTC
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