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 |
| 603-500
| 7 |
Tilton |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2022-11-05 |
|
| 603-501
| A |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-501
| 0 |
Portsmouth |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2006-06-04 |
|
| 603-501
| 1 |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2007-12-28 |
|
| 603-501
| 2 |
Portsmouth |
NH |
MNCHNHCO40Z |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
122 |
|
2026-03-23 |
|
| 603-501
| 3 |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-501
| 4 |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-501
| 5 |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-501
| 7 |
Portsmouth |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-501
| 8 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-10-02 |
|
| 603-501
| 9 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2006-05-16 |
|
| 603-502
| A |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-503
| A |
Lancaster |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-503
| 0 |
Lancaster |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2022-10-14 |
|
| 603-503
| 2 |
Lancaster |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2026-07-04 |
|
| 603-503
| 4 |
Lancaster |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-11-28 |
|
| 603-503
| 5 |
Lancaster |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2018-11-05 |
|
| 603-503
| 9 |
Lancaster |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-504
| A |
Claremont |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-504
| 0 |
Claremont |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2005-01-14 |
|
| 603-504
| 1 |
Claremont |
NH |
MNCHNHCO47Z |
829J PAETEC ITEL, LLC |
122 |
|
2004-04-06 |
|
| 603-504
| 2 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2005-11-22 |
|
| 603-504
| 3 |
Claremont |
NH |
MNCHNHCO45Z |
829J PAETEC ITEL, LLC |
122 |
|
2004-08-04 |
|
| 603-504
| 4 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-06-14 |
|
| 603-504
| 5 |
Claremont |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-08-07 |
|
| 603-504
| 6 |
Claremont |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2006-10-30 |
|
| 603-504
| 7 |
Claremont |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-504
| 8 |
Claremont |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-504
| 9 |
Claremont |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
2020-04-10 |
|
| 603-505
| A |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-505
| 0 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2002-11-30 |
|
| 603-505
| 1 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-08-03 |
|
| 603-505
| 2 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-11-19 |
|
| 603-505
| 3 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-09-03 |
|
| 603-505
| 4 |
Derry |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2003-01-01 |
|
| 603-505
| 5 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-03-08 |
|
| 603-505
| 6 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-03-18 |
|
| 603-505
| 7 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-08-02 |
|
| 603-505
| 8 |
Derry |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-02-08 |
|
| 603-505
| 9 |
Derry |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2005-05-16 |
|
| 603-506
| A |
Manchester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-506
| 0 |
Manchester |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-08-07 |
|
| 603-506
| 1 |
Manchester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-05-11 |
|
| 603-506
| 2 |
Manchester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-04-12 |
|
| 603-506
| 3 |
Manchester |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2019-09-16 |
|
| 603-506
| 4 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2019-09-20 |
|
| 603-506
| 5 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2019-09-20 |
|
| 603-506
| 6 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2019-08-06 |
|
| 603-506
| 7 |
Manchester |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2019-03-20 |
|
| 603-506
| 8 |
Manchester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2018-12-13 |
|
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Last updated: Tue, 01 Sep 2026 00:40:05 UTC
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