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 |
| 603-575
| 9 |
Littleton |
NH |
|
7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH |
122 |
|
|
|
| 603-576
| A |
Orford |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-576
| 2 |
Orford |
NH |
|
145J TERRA NOVA TELECOM INC. |
122 |
|
2021-12-12 |
|
| 603-576
| 4 |
Orford |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-577
| A |
Nashua |
NH |
NASHNHWPDS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 0 |
Nashua |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2015-05-01 |
|
| 603-577
| 1 |
Nashua |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2006-12-20 |
|
| 603-577
| 2 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 3 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 4 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 5 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 6 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 7 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 8 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-577
| 9 |
Nashua |
NH |
|
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-578
| A |
Nashua |
NH |
NASHNHWPDS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-579
| A |
Nashua |
NH |
NASHNHWPDS1 |
5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH |
122 |
|
|
|
| 603-580
| A |
Exeter |
NH |
MNCHNHIE6MD |
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-580
| 0 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2026-01-08 |
|
| 603-580
| 1 |
Exeter |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-580
| 2 |
Exeter |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-580
| 3 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2022-08-29 |
|
| 603-580
| 4 |
Exeter |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2012-07-20 |
|
| 603-580
| 5 |
Exeter |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
|
|
| 603-580
| 6 |
Exeter |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2003-01-01 |
|
| 603-580
| 7 |
Exeter |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2003-01-01 |
|
| 603-580
| 8 |
Exeter |
NH |
|
8468 FREEDOM RING COMMUNICATIONS, LLC |
122 |
|
2003-01-06 |
|
| 603-580
| 9 |
Exeter |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2006-03-14 |
|
| 603-581
| A |
Laconia |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2025-04-30 |
|
| 603-581
| 0 |
Laconia |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-581
| 1 |
Laconia |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2004-11-28 |
|
| 603-581
| 2 |
Laconia |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
2000-08-08 |
|
| 603-581
| 3 |
Laconia |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2015-05-13 |
|
| 603-581
| 4 |
Laconia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-12-14 |
|
| 603-581
| 5 |
Laconia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-01-14 |
|
| 603-581
| 6 |
Laconia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2008-03-03 |
|
| 603-581
| 7 |
Laconia |
NH |
|
829J PAETEC ITEL, LLC |
122 |
|
|
|
| 603-581
| 8 |
Laconia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-08-02 |
|
| 603-581
| 9 |
Laconia |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2007-08-02 |
|
| 603-582
| A |
Merrimack |
NH |
MNCHNHCOX4Z |
6290 UNITED STATES CELLULAR - NH |
122 |
|
|
|
| 603-583
| A |
Exeter |
NH |
MNCHNHCOX8Z |
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-583
| 0 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2010-05-03 |
|
| 603-583
| 1 |
Exeter |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2010-07-06 |
|
| 603-583
| 2 |
Exeter |
NH |
|
4036 NEW CINGULAR WIRELESS PCS, LLC - DC |
122 |
|
2011-02-10 |
|
| 603-583
| 3 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2009-06-01 |
|
| 603-583
| 4 |
Exeter |
NH |
|
4017 LEVEL 3 COMMUNICATIONS, LLC - NH |
122 |
|
|
|
| 603-583
| 5 |
Exeter |
NH |
|
318J COMCAST IP PHONE, LLC |
122 |
|
2009-09-09 |
|
| 603-583
| 6 |
Exeter |
NH |
|
5562 METROPCS, INC. |
122 |
|
2011-03-25 |
|
| 603-583
| 7 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2011-12-04 |
|
| 603-583
| 8 |
Exeter |
NH |
|
6386 BELL ATLANTIC MOBILE, INC |
122 |
|
2013-06-30 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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