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 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 603-568
| 4 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-08-03 |
|
| 603-568
| 5 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-09-03 |
|
| 603-568
| 6 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-11-03 |
|
| 603-568
| 7 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-01-19 |
|
| 603-568
| 8 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2003-05-10 |
|
| 603-568
| 9 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2004-04-01 |
|
| 603-569
| A |
Wolfeboro |
NH |
WLBONHGSRS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-570
| A |
Portsmouth |
NH |
DOVRNHTHXEX |
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
|
|
| 603-570
| 0 |
Portsmouth |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2014-03-10 |
|
| 603-570
| 1 |
Portsmouth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2015-08-11 |
|
| 603-570
| 2 |
Portsmouth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2006-10-17 |
|
| 603-570
| 3 |
Portsmouth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-07-13 |
|
| 603-570
| 4 |
Portsmouth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2001-07-13 |
|
| 603-570
| 5 |
Portsmouth |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-18 |
|
| 603-570
| 6 |
Portsmouth |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
2012-03-30 |
|
| 603-570
| 7 |
Portsmouth |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2007-06-13 |
|
| 603-570
| 8 |
Portsmouth |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2018-01-10 |
|
| 603-570
| 9 |
Portsmouth |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-571
| A |
Derry |
NH |
DRRYNHBC1MD |
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2024-01-05 |
|
| 603-571
| 0 |
Derry |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-571
| 1 |
Derry |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-571
| 2 |
Derry |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-02-02 |
|
| 603-571
| 3 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2025-09-06 |
|
| 603-571
| 4 |
Derry |
NH |
|
073H TELNYX LLC |
122 |
|
2024-01-15 |
|
| 603-571
| 5 |
Derry |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-571
| 6 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2025-12-26 |
|
| 603-571
| 7 |
Derry |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-571
| 8 |
Derry |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
|
|
| 603-571
| 9 |
Derry |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2025-04-23 |
|
| 603-573
| A |
Concord |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-573
| 0 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2014-09-01 |
|
| 603-573
| 1 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2013-10-01 |
|
| 603-573
| 2 |
Concord |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
2012-12-12 |
|
| 603-573
| 3 |
Concord |
NH |
|
7421 AT&T - LOCAL |
122 |
|
2000-12-15 |
|
| 603-573
| 4 |
Concord |
NH |
|
7421 AT&T - LOCAL |
122 |
|
2002-09-09 |
|
| 603-573
| 5 |
Concord |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2007-07-09 |
|
| 603-573
| 6 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2013-01-31 |
|
| 603-573
| 7 |
Concord |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
2012-12-12 |
|
| 603-573
| 8 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2017-09-19 |
|
| 603-573
| 9 |
Concord |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-574
| A |
Alstead |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-574
| 0 |
Alstead |
NH |
|
939H COMMIO, LLC |
122 |
|
2022-11-05 |
|
| 603-574
| 4 |
Alstead |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-575
| A |
Littleton |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-575
| 0 |
Littleton |
NH |
|
8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH |
122 |
|
2019-05-17 |
|
| 603-575
| 1 |
Littleton |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2019-07-08 |
|
| 603-575
| 3 |
Littleton |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-12-23 |
|
| 603-575
| 5 |
Littleton |
NH |
|
793K TWC IP ENABLED SERVICES, LLC |
122 |
|
2012-10-02 |
|
| 603-575
| 6 |
Littleton |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2013-10-21 |
|
| 603-575
| 7 |
Littleton |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2025-03-14 |
|
<< 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
Sponsored by: Execulink Telecom
Like this site? We accept donations via PayPal.