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 |
| 603-255
| 3 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2020-05-10 |
|
| 603-255
| 4 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2020-06-01 |
|
| 603-255
| 5 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2020-07-02 |
|
| 603-255
| 6 |
Manchester |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2020-05-23 |
|
| 603-255
| 7 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2020-09-18 |
|
| 603-255
| 8 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-03-08 |
|
| 603-255
| 9 |
Manchester |
NH |
DOVRNHTHXJX |
478J NUSO, LLC |
122 |
|
2020-10-15 |
|
| 603-256
| A |
West Chesterfield |
NH |
BRBOVTMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-256
| 1 |
West Chesterfield |
NH |
MNCHNHCO42Z |
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2024-01-07 |
|
| 603-256
| 2 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-03-30 |
|
| 603-256
| 3 |
West Chesterfield |
NH |
BRBOVTMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-256
| 4 |
West Chesterfield |
NH |
BRBOVTMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-256
| 5 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-01-15 |
|
| 603-256
| 6 |
West Chesterfield |
NH |
BRBOVTMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-256
| 7 |
West Chesterfield |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-02-06 |
|
| 603-256
| 8 |
West Chesterfield |
NH |
BRBOVTMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-256
| 9 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2023-09-28 |
|
| 603-257
| A |
Plaistow |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-257
| 0 |
Plaistow |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2016-11-16 |
|
| 603-257
| 1 |
Plaistow |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-257
| 2 |
Plaistow |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2023-03-20 |
|
| 603-257
| 5 |
Plaistow |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2010-08-10 |
|
| 603-257
| 6 |
Plaistow |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-05-16 |
|
| 603-257
| 7 |
Plaistow |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2007-05-04 |
|
| 603-257
| 8 |
Plaistow |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-04-22 |
|
| 603-257
| 9 |
Plaistow |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
|
|
| 603-258
| A |
Hollis |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
|
|
| 603-258
| 0 |
Hollis |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-02-15 |
|
| 603-258
| 1 |
Hollis |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2023-07-02 |
|
| 603-258
| 5 |
Hollis |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2026-01-22 |
|
| 603-258
| 7 |
Hollis |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2026-01-30 |
|
| 603-258
| 8 |
Hollis |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2023-09-08 |
|
| 603-258
| 9 |
Hollis |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
2017-06-05 |
|
| 603-259
| A |
Littleton |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-259
| 0 |
Littleton |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2004-10-09 |
|
| 603-259
| 1 |
Littleton |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2005-09-15 |
|
| 603-259
| 2 |
Littleton |
NH |
PTMONH073MD |
9827 OTEL TELEKOM, INC. - NH |
122 |
|
2002-09-19 |
|
| 603-259
| 3 |
Littleton |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-10-12 |
|
| 603-259
| 4 |
Littleton |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-259
| 6 |
Littleton |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-12-04 |
|
| 603-259
| 7 |
Littleton |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2007-01-05 |
|
| 603-259
| 8 |
Littleton |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2024-06-30 |
|
| 603-260
| A |
Derry |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-260
| 0 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-03-01 |
|
| 603-260
| 1 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-05-01 |
|
| 603-260
| 2 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-08-01 |
|
| 603-260
| 3 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-06-01 |
|
| 603-260
| 4 |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-03-01 |
|
| 603-260
| 5 |
Derry |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2013-06-01 |
|
| 603-260
| 6 |
Derry |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2014-09-05 |
|
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Last updated: Tue, 16 Jun 2026 00:09:45 UTC
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