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603-400

You are reviewing the Area Code (NPA/NXX) report for 603-400. Did you mean to search the SMS short code 603400?

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Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
Examples: 206-739-5800, 206, 206-739, 48369
Raw Number603400
Basic Format603-400
NPA (Area Code)603
NXX400

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeAssign DateCityStateRegionBlock Effective Date
603-400-0XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS09/30/2011HOLLISNHNE10/18/2011
603-400-1XXX792KCHARTER IP ENABLED SERVICES, LLCHOLLISAS09/01/2011HOLLISNHNE10/15/2011
603-400-2XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS10/15/2013HOLLISNHNE11/04/2013
603-400-3XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS03/30/2017HOLLISNHNE04/29/2017
603-400-4XXX6889OMNIPOINT MIAMI E LICENSE, LLCHOLLISAS02/03/2017HOLLISNHNE02/27/2017
603-400-5XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS09/01/2016HOLLISNHNE10/01/2016
603-400-6XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS06/09/2016HOLLISNHNE07/09/2016
603-400-7XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS02/25/2016HOLLISNHNE03/26/2016
603-400-8XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS09/10/2015HOLLISNHNE09/22/2015
603-400-9XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCHOLLISAS10/30/2014HOLLISNHNE11/11/2014
603-400-XXXX792KCHARTER IP ENABLED SERVICES, LLCHOLLISAS08/31/2011HOLLISNH

Business/Government Phones on the 603-400 Prefix

PhoneNameAddress
603-400-3888Livewell Custom Build & Remodeling LLC
603-400-4920Waterscapes of New England, LLC
603-400-5033Bellingham门店295 Daniel Webster Highway Nashua 03060 US

Reports

Anonymous User from Merrimack, New Hampshire

November 28, 2025 at 1:37 PM

603-400-7188 reported as a Robocall. Received on November 28, 2025 at 1:32 PM.
Call for Medical & prescriptions

Anonymous User from , NH

July 10, 2023 at 4:31 PM

603-400-1736 reported as a Live Voice or Other. Received on July 10, 2023 at 4:15 PM.

Anonymous User from Merrimack, New Hampshire

March 22, 2023 at 10:50 AM

603-400-1667 reported as a Robocall. Received on March 22, 2023 at 10:16 AM.
Call for Dropped call or no message

Anonymous User from Manchester, New Hampshire

June 19, 2022 at 4:34 PM

603-400-0500 reported as a unwanted call. Received on June 14, 2022 at 3:19 PM.
Call for Dropped call or no message

Anonymous User from , CA

June 21, 2016 at 11:11 PM

reported as a Autodialed Live Voice Call. Received on June 21, 2016 at 3:05 PM.
Robocall for unknown
Caller ID indicated they called from 603-400-8958
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , NC

May 5, 2016 at 5:43 PM

reported as a Prerecorded Voice. Received on May 5, 2016 at 12:23 PM.
Robocall for unknown
Caller ID indicated they called from 603-400-8526
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , WI

April 26, 2016 at 10:18 PM

603-400-8406 reported as a Prerecorded Voice. Received on April 26, 2016 at 10:30 AM.
Robocall for unknown
Contacted via Wired

Anonymous User from , AZ

April 8, 2016 at 3:23 PM

603-400-8274 reported as a Live Voice. Received on April 8, 2016 at 6:49 AM.
Telemarketing (including do not call and spoofing) for unknown
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , LA

March 30, 2016 at 4:15 PM

603-400-0310 reported as a Prerecorded Voice. Received on March 30, 2016 at 8:40 AM.
Telemarketing (including do not call and spoofing) for unknown
Contacted via Internet (VOIP)

Anonymous User from , MD

March 28, 2016 at 11:18 PM

603-400-0555 reported as a Prerecorded Voice. Received on March 28, 2016 at 12:06 PM.
Robocall for unknown
Contacted via Wired

Most 'popular' numbers on this prefix:

603-400-0XXX: 603-400-0303 | 603-400-0307 | 603-400-0309 | 603-400-0314 | 603-400-0315 | 603-400-0316 | 603-400-0502 | 603-400-0506 | 603-400-0552 | 603-400-0553 | 603-400-0559 | 603-400-0587 |
603-400-1XXX: 603-400-1600 | 603-400-1608 | 603-400-1647 | 603-400-1660 | 603-400-1662 | 603-400-1667 | 603-400-1700 | 603-400-1708 | 603-400-1733 | 603-400-1734 | 603-400-1737 | 603-400-1747 |
603-400-2XXX: 603-400-2600 | 603-400-2620 | 603-400-2623 | 603-400-2626 | 603-400-2658 | 603-400-2667 |
603-400-3XXX: 603-400-3224 | 603-400-3228 | 603-400-3240 | 603-400-3245 | 603-400-3246 | 603-400-3258 | 603-400-3800 | 603-400-3880 | 603-400-3883 | 603-400-3887 |
603-400-4XXX: 603-400-4920 | 603-400-4922 | 603-400-4929 | 603-400-4959 | 603-400-4997 | 603-400-4998 |
603-400-6XXX: 603-400-6710 | 603-400-6711 | 603-400-6712 | 603-400-6762 | 603-400-6767 | 603-400-6787 |
603-400-8XXX: 603-400-8258 | 603-400-8272 | 603-400-8273 | 603-400-8278 | 603-400-8282 | 603-400-8283 | 603-400-8400 | 603-400-8404 | 603-400-8409 | 603-400-8443 | 603-400-8452 | 603-400-8453 | 603-400-8500 | 603-400-8520 | 603-400-8523 | 603-400-8524 | 603-400-8556 | 603-400-8559 | 603-400-8952 | 603-400-8953 | 603-400-8959 | 603-400-8987 | 603-400-8997 | 603-400-8998 |
603-400-9XXX: 603-400-9470 | 603-400-9472 | 603-400-9478 |