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 |
| 603-605
| 8 |
Dover |
NH |
MNCHNHBODS0 |
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2017-09-14 |
|
| 603-605
| 9 |
Dover |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2021-07-02 |
|
| 603-606
| A |
Manchester |
NH |
DOVRNHTHGMD |
624H ONVOY SPECTRUM, LLC |
122 |
|
|
|
| 603-606
| 0 |
Manchester |
NH |
DOVRNHTHGMD |
624H ONVOY SPECTRUM, LLC |
122 |
|
2019-12-02 |
|
| 603-606
| 1 |
Manchester |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2006-05-18 |
|
| 603-606
| 2 |
Manchester |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2006-05-18 |
|
| 603-606
| 3 |
Manchester |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2006-03-27 |
|
| 603-606
| 4 |
Manchester |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-09-13 |
|
| 603-606
| 5 |
Manchester |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-606
| 6 |
Manchester |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-606
| 7 |
Manchester |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2003-05-13 |
|
| 603-606
| 8 |
Manchester |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2017-05-26 |
|
| 603-606
| 9 |
Manchester |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2019-12-02 |
|
| 603-607
| A |
West Chesterfield |
NH |
DOVRNHTHXJX |
478J NUSO, LLC |
122 |
|
|
|
| 603-607
| 1 |
West Chesterfield |
NH |
DOVRNHTHXJX |
478J NUSO, LLC |
122 |
|
2020-10-11 |
|
| 603-607
| 2 |
West Chesterfield |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2023-11-13 |
|
| 603-607
| 5 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2022-12-23 |
|
| 603-607
| 6 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-05-23 |
|
| 603-607
| 7 |
West Chesterfield |
NH |
MNCHNHCOX9Z |
637E ONVOY, LLC - NH |
122 |
|
2021-08-02 |
|
| 603-608
| A |
Northwood |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
|
|
| 603-608
| 1 |
Northwood |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
2005-04-15 |
|
| 603-608
| 2 |
Northwood |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
2005-10-30 |
|
| 603-608
| 3 |
Northwood |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2004-09-02 |
|
| 603-608
| 4 |
Northwood |
NH |
MNCHNHCO23Z |
073H TELNYX LLC |
122 |
|
2024-07-07 |
|
| 603-608
| 5 |
Northwood |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
2003-10-07 |
|
| 603-608
| 6 |
Northwood |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-608
| 7 |
Northwood |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-608
| 8 |
Northwood |
NH |
MNCHNHCOCM1 |
5562 METROPCS, INC. |
122 |
|
|
|
| 603-608
| 9 |
Northwood |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-609
| A |
Dover |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-609
| 0 |
Dover |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-609
| 1 |
Dover |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-08 |
|
| 603-609
| 3 |
Dover |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2020-12-05 |
|
| 603-609
| 4 |
Dover |
NH |
MNCHNHAC7MD |
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-05-09 |
|
| 603-609
| 5 |
Dover |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2008-11-18 |
|
| 603-609
| 6 |
Dover |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2008-06-17 |
|
| 603-609
| 7 |
Dover |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
2010-10-02 |
|
| 603-609
| 8 |
Dover |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2012-02-20 |
|
| 603-609
| 9 |
Dover |
NH |
MNCHNHBODS0 |
927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH |
122 |
|
2020-10-30 |
|
| 603-610
| A |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-610
| 0 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-610
| 1 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-610
| 2 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-610
| 3 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2012-04-25 |
|
| 603-610
| 4 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-12-09 |
|
| 603-610
| 5 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-12-09 |
|
| 603-610
| 6 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-610
| 7 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2004-04-19 |
|
| 603-610
| 8 |
Portsmouth |
NH |
PTMONH073MD |
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2004-04-19 |
|
| 603-610
| 9 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
<< 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 >>
Last updated: Tue, 31 Mar 2026 13:56:49 UTC
Sponsored by: ISP Telecom
Like this site? We accept donations via PayPal.