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 |
| 603-808
| 0 |
Antrim |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2010-02-10 |
|
| 603-808
| 1 |
Antrim |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-04-13 |
|
| 603-808
| 2 |
Antrim |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-04-13 |
|
| 603-808
| 8 |
Antrim |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-07-11 |
|
| 603-809
| A |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-809
| 0 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-05-06 |
|
| 603-809
| 1 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-05-08 |
|
| 603-809
| 2 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-07-02 |
|
| 603-809
| 3 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2008-01-06 |
|
| 603-809
| 4 |
Nashua |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2007-12-05 |
|
| 603-809
| 5 |
Nashua |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2008-01-06 |
|
| 603-809
| 6 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-03-03 |
|
| 603-809
| 7 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-05-02 |
|
| 603-809
| 8 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-09-01 |
|
| 603-809
| 9 |
Nashua |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-08-02 |
|
| 603-810
| A |
Nashua |
NH |
MNCHNHAC4MD |
073H TELNYX LLC |
122 |
|
|
|
| 603-810
| 0 |
Nashua |
NH |
MNCHNHAC4MD |
073H TELNYX LLC |
122 |
|
2021-07-23 |
|
| 603-810
| 1 |
Nashua |
NH |
MNCHNHBODS0 |
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2021-07-24 |
|
| 603-810
| 2 |
Nashua |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2021-08-29 |
|
| 603-810
| 3 |
Nashua |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2021-08-29 |
|
| 603-810
| 4 |
Nashua |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2021-08-29 |
|
| 603-810
| 5 |
Nashua |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2021-08-29 |
|
| 603-810
| 6 |
Nashua |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-810
| 7 |
Nashua |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-810
| 8 |
Nashua |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-810
| 9 |
Nashua |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-08-10 |
|
| 603-812
| A |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-812
| 0 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-812
| 1 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-04-01 |
|
| 603-812
| 2 |
Portsmouth |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
|
|
| 603-812
| 3 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2011-09-19 |
|
| 603-812
| 4 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-812
| 5 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2006-08-07 |
|
| 603-812
| 6 |
Portsmouth |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2007-05-04 |
|
| 603-812
| 7 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-08-14 |
|
| 603-812
| 8 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2010-03-15 |
|
| 603-812
| 9 |
Portsmouth |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-08-01 |
|
| 603-813
| A |
Center Barnstead |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
|
|
| 603-813
| 0 |
Center Barnstead |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2022-02-17 |
|
| 603-813
| 1 |
Center Barnstead |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2022-02-17 |
|
| 603-813
| 2 |
Center Barnstead |
NH |
ROCHNHWE4MD |
314C IDT AMERICA, CORP. - NH |
122 |
|
2009-12-18 |
|
| 603-813
| 3 |
Center Barnstead |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2025-10-17 |
|
| 603-813
| 5 |
Center Barnstead |
NH |
MNCHNHBO2MD |
490J BOOST SUBSCRIBERCO L.L.C. |
122 |
|
2023-10-27 |
|
| 603-814
| A |
Seabrook |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-814
| 0 |
Seabrook |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2019-10-07 |
|
| 603-814
| 1 |
Seabrook |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2010-09-30 |
|
| 603-814
| 2 |
Seabrook |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2022-02-21 |
|
| 603-814
| 3 |
Seabrook |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2012-03-05 |
|
| 603-814
| 4 |
Seabrook |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2015-07-15 |
|
| 603-814
| 5 |
Seabrook |
NH |
MNCHNHAC3MD |
939H COMMIO, LLC |
122 |
|
2022-09-10 |
|
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Last updated: Tue, 31 Mar 2026 13:56:49 UTC
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