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 |
| 603-403
| 3 |
Rochester |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2022-05-20 |
|
| 603-403
| 4 |
Rochester |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2019-11-19 |
|
| 603-403
| 5 |
Rochester |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-403
| 6 |
Rochester |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-05-16 |
|
| 603-403
| 7 |
Rochester |
NH |
|
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2021-07-16 |
|
| 603-403
| 8 |
Rochester |
NH |
|
314C IDT AMERICA, CORP. - NH |
122 |
|
2019-05-13 |
|
| 603-403
| 9 |
Rochester |
NH |
|
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2021-03-03 |
|
| 603-404
| A |
Derry |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-404
| 0 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2016-03-04 |
|
| 603-404
| 1 |
Derry |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2016-12-10 |
|
| 603-404
| 2 |
Derry |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2016-06-15 |
|
| 603-404
| 3 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2017-11-16 |
|
| 603-404
| 4 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2017-07-07 |
|
| 603-404
| 5 |
Derry |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2021-04-23 |
|
| 603-404
| 6 |
Derry |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2018-10-26 |
|
| 603-404
| 7 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2024-04-23 |
|
| 603-404
| 8 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2018-08-10 |
|
| 603-404
| 9 |
Derry |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-07-30 |
|
| 603-405
| A |
Somersworth |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
|
|
| 603-405
| 0 |
Somersworth |
NH |
|
314C IDT AMERICA, CORP. - NH |
122 |
|
2020-12-24 |
|
| 603-405
| 1 |
Somersworth |
NH |
|
073H TELNYX LLC |
122 |
|
2024-07-04 |
|
| 603-405
| 2 |
Somersworth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2017-02-16 |
|
| 603-405
| 6 |
Somersworth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2016-06-17 |
|
| 603-405
| 8 |
Somersworth |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2017-05-04 |
|
| 603-406
| A |
Concord |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-406
| 0 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2020-08-14 |
|
| 603-406
| 1 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2020-01-13 |
|
| 603-406
| 2 |
Concord |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2019-12-26 |
|
| 603-406
| 3 |
Concord |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2019-08-07 |
|
| 603-406
| 4 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2019-03-26 |
|
| 603-406
| 5 |
Concord |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2019-11-02 |
|
| 603-406
| 6 |
Concord |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-04-04 |
|
| 603-406
| 7 |
Concord |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-05-18 |
|
| 603-406
| 8 |
Concord |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2021-02-05 |
|
| 603-406
| 9 |
Concord |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2019-02-23 |
|
| 603-407
| A |
Belmont |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-407
| 0 |
Belmont |
NH |
|
939H COMMIO, LLC |
122 |
|
2022-11-05 |
|
| 603-407
| 1 |
Belmont |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2015-07-04 |
|
| 603-407
| 8 |
Belmont |
NH |
|
073H TELNYX LLC |
122 |
|
2024-06-30 |
|
| 603-408
| A |
Berlin |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-408
| 0 |
Berlin |
NH |
|
073H TELNYX LLC |
122 |
|
2024-06-30 |
|
| 603-408
| 1 |
Berlin |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-10-10 |
|
| 603-408
| 2 |
Berlin |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2020-03-24 |
|
| 603-408
| 3 |
Berlin |
NH |
|
5562 METROPCS, INC. |
122 |
|
2025-04-11 |
|
| 603-408
| 4 |
Berlin |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-06-02 |
|
| 603-408
| 5 |
Berlin |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-07-29 |
|
| 603-408
| 6 |
Berlin |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-05-17 |
|
| 603-408
| 7 |
Berlin |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-03-14 |
|
| 603-408
| 8 |
Berlin |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2016-01-23 |
|
| 603-408
| 9 |
Berlin |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2016-01-23 |
|
<< 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 >>
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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