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 |
| 603-855
| 8 |
Alton |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-07-11 |
|
| 603-856
| A |
Concord |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-856
| 0 |
Concord |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-856
| 1 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-07-03 |
|
| 603-856
| 2 |
Concord |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-856
| 3 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-11-03 |
|
| 603-856
| 4 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2010-11-01 |
|
| 603-856
| 5 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-10-03 |
|
| 603-856
| 6 |
Concord |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-05-02 |
|
| 603-856
| 7 |
Concord |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2006-11-30 |
|
| 603-856
| 8 |
Concord |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2006-11-30 |
|
| 603-856
| 9 |
Concord |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-857
| A |
Suncook |
NH |
|
616J LEAP TELECOM, LLC |
122 |
|
|
|
| 603-857
| 0 |
Suncook |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2022-06-05 |
|
| 603-857
| 1 |
Suncook |
NH |
|
073H TELNYX LLC |
122 |
|
2023-10-16 |
|
| 603-857
| 2 |
Suncook |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-01-15 |
|
| 603-857
| 7 |
Suncook |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2024-11-17 |
|
| 603-857
| 8 |
Suncook |
NH |
|
616J LEAP TELECOM, LLC |
122 |
|
2025-05-04 |
|
| 603-857
| 9 |
Suncook |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2024-09-28 |
|
| 603-858
| A |
Manchester |
NH |
MNCHNHCOCM1 |
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 0 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 1 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 2 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 3 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 4 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 5 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 6 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-858
| 7 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2016-02-06 |
|
| 603-858
| 8 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
2016-12-10 |
|
| 603-858
| 9 |
Manchester |
NH |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
122 |
|
|
|
| 603-859
| A |
New Durham |
NH |
NWDRNHXARP0 |
0049 UNION TEL. CO. |
122 |
|
|
|
| 603-859
| 0 |
New Durham |
NH |
|
0049 UNION TEL. CO. |
122 |
|
|
|
| 603-859
| 2 |
New Durham |
NH |
|
0049 UNION TEL. CO. |
122 |
|
|
|
| 603-859
| 4 |
New Durham |
NH |
|
0049 UNION TEL. CO. |
122 |
|
|
|
| 603-859
| 5 |
New Durham |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-07-11 |
|
| 603-859
| 8 |
New Durham |
NH |
|
637E ONVOY, LLC - NH |
122 |
|
2025-01-18 |
|
| 603-859
| 9 |
New Durham |
NH |
|
0049 UNION TEL. CO. |
122 |
|
|
|
| 603-860
| A |
Manchester |
NH |
MNCHNHACAMD |
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
|
|
| 603-861
| A |
Tamworth |
NH |
MNCHNHACDS0 |
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-861
| 0 |
Tamworth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2024-06-27 |
|
| 603-861
| 2 |
Tamworth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-10-06 |
|
| 603-861
| 6 |
Tamworth |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2025-02-13 |
|
| 603-861
| 9 |
Tamworth |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-862
| A |
Durham |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-863
| A |
Newport |
NH |
NWPTNHMADS0 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-864
| A |
Nashua |
NH |
NASHNHWPDS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-864
| 0 |
Nashua |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2014-11-24 |
|
| 603-864
| 1 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-864
| 2 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-864
| 3 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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