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 |
| 603-367
| A |
Madison |
NH |
MDSNNHYARS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-367
| 0 |
Madison |
NH |
|
996E BANDWIDTH.COM CLEC, LLC - NH |
122 |
|
2002-09-19 |
|
| 603-367
| 1 |
Madison |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2023-01-04 |
|
| 603-367
| 2 |
Madison |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2008-03-05 |
|
| 603-367
| 3 |
Madison |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2004-09-04 |
|
| 603-367
| 4 |
Madison |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-367
| 7 |
Madison |
NH |
|
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-367
| 8 |
Madison |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-367
| 9 |
Madison |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-368
| A |
Portsmouth |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
|
|
| 603-368
| 0 |
Portsmouth |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2021-09-24 |
|
| 603-368
| 1 |
Portsmouth |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2021-09-24 |
|
| 603-368
| 2 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2018-02-26 |
|
| 603-368
| 3 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2018-02-26 |
|
| 603-368
| 4 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2018-02-26 |
|
| 603-368
| 5 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2018-02-26 |
|
| 603-368
| 6 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-06-21 |
|
| 603-368
| 7 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-01-31 |
|
| 603-368
| 8 |
Portsmouth |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2019-08-30 |
|
| 603-368
| 9 |
Portsmouth |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-369
| A |
Concord |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-369
| 0 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2004-09-13 |
|
| 603-369
| 1 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2004-11-13 |
|
| 603-369
| 2 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-02-06 |
|
| 603-369
| 3 |
Concord |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-01 |
|
| 603-369
| 4 |
Concord |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-369
| 5 |
Concord |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2003-10-25 |
|
| 603-369
| 6 |
Concord |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-05-01 |
|
| 603-369
| 7 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-10-11 |
|
| 603-369
| 8 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-10-11 |
|
| 603-369
| 9 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-04-09 |
|
| 603-370
| A |
Candia |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-370
| 0 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-370
| 1 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-370
| 2 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-12-02 |
|
| 603-370
| 3 |
Candia |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2010-10-02 |
|
| 603-370
| 4 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2018-09-20 |
|
| 603-370
| 5 |
Candia |
NH |
|
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2011-03-07 |
|
| 603-370
| 6 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2019-01-04 |
|
| 603-370
| 7 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-370
| 8 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-370
| 9 |
Candia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-371
| A |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-371
| 0 |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2000-05-29 |
|
| 603-371
| 1 |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-05-09 |
|
| 603-371
| 2 |
Peterborough |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-07-15 |
|
| 603-371
| 3 |
Peterborough |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-07-15 |
|
| 603-371
| 4 |
Peterborough |
NH |
|
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2002-09-19 |
|
| 603-371
| 5 |
Peterborough |
NH |
|
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2005-01-24 |
|
| 603-371
| 6 |
Peterborough |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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