Local Calling Guide
Area code/prefix search
NPA: 603
[Rate centres in NPA 603]
[Dial plan for NPA 603]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 603-947
| 6 |
Plymouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-947
| 7 |
Plymouth |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-05-09 |
|
| 603-947
| 9 |
Plymouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-948
| A |
Rochester |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
|
|
| 603-948
| 0 |
Rochester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2011-03-29 |
|
| 603-948
| 1 |
Rochester |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
2009-09-20 |
|
| 603-948
| 2 |
Rochester |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
2008-04-13 |
|
| 603-948
| 3 |
Rochester |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-05-24 |
|
| 603-948
| 4 |
Rochester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-01-04 |
|
| 603-948
| 5 |
Rochester |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-05-01 |
|
| 603-948
| 6 |
Rochester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2013-03-26 |
|
| 603-948
| 7 |
Rochester |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-11-01 |
|
| 603-948
| 8 |
Rochester |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
2013-10-19 |
|
| 603-948
| 9 |
Rochester |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2014-09-24 |
|
| 603-951
| A |
Milan |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-951
| 0 |
Milan |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2022-07-01 |
|
| 603-951
| 2 |
Milan |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-12-05 |
|
| 603-951
| 4 |
Milan |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-952
| A |
Salem |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-952
| 0 |
Salem |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2017-11-21 |
|
| 603-952
| 1 |
Salem |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2015-11-23 |
|
| 603-952
| 2 |
Salem |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2010-06-30 |
|
| 603-952
| 3 |
Salem |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2010-09-27 |
|
| 603-952
| 4 |
Salem |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-952
| 5 |
Salem |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2012-10-05 |
|
| 603-952
| 6 |
Salem |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2012-10-05 |
|
| 603-952
| 7 |
Salem |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2014-06-19 |
|
| 603-952
| 8 |
Salem |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2014-10-16 |
|
| 603-952
| 9 |
Salem |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2013-12-05 |
|
| 603-953
| A |
Dover |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-953
| 0 |
Dover |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-953
| 3 |
Dover |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-12-03 |
|
| 603-953
| 4 |
Dover |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2005-11-22 |
|
| 603-953
| 5 |
Dover |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-11-02 |
|
| 603-953
| 6 |
Dover |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-09-01 |
|
| 603-953
| 7 |
Dover |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2008-02-03 |
|
| 603-953
| 8 |
Dover |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-04-14 |
|
| 603-956
| A |
Portsmouth |
NH |
MNCHNHCO18Z |
197D VONAGE AMERICA LLC |
122 |
|
|
|
| 603-956
| 0 |
Portsmouth |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2022-11-24 |
|
| 603-956
| 1 |
Portsmouth |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2022-12-15 |
|
| 603-956
| 2 |
Portsmouth |
NH |
MNCHNHCO18Z |
197D VONAGE AMERICA LLC |
122 |
|
2022-09-23 |
|
| 603-956
| 3 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-09-29 |
|
| 603-956
| 4 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-09-29 |
|
| 603-956
| 5 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-12-23 |
|
| 603-956
| 6 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-08-20 |
|
| 603-956
| 7 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-05-08 |
|
| 603-956
| 8 |
Portsmouth |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2024-01-02 |
|
| 603-956
| 9 |
Portsmouth |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-06-23 |
|
| 603-957
| A |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-957
| 0 |
Portsmouth |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
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Last updated: Tue, 31 Mar 2026 13:56:49 UTC
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