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603-503

You are reviewing the Area Code (NPA/NXX) report for 603-503. Did you mean to search the SMS short code 603503?

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Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
Examples: 206-739-5800, 206, 206-739, 48369
Raw Number603503
Basic Format603-503
NPA (Area Code)603
NXX503

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeAssign DateCityStateRegionBlock Effective DateBlock Available Date
603-503-0XXX6386BELL ATLANTIC MOBILE, INCLANCASTERAS10/04/2022LANCASTERNHNE10/14/2022
603-503-1XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAVLANCASTERNHNE08/04/2025
603-503-2XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAVLANCASTERNHNE01/30/2004
603-503-3XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAVLANCASTERNHNE06/09/2025
603-503-4XXX6889OMNIPOINT MIAMI E LICENSE, LLCLANCASTERAS11/18/2025LANCASTERNHNE11/28/2025
603-503-5XXX4036NEW CINGULAR WIRELESS PCS, LLC - DCLANCASTERAS10/24/2018LANCASTERNHNE11/05/2018
603-503-6XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAFLANCASTERNHNE04/22/2026
603-503-7XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAVLANCASTERNHNE03/16/2002
603-503-8XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERAVLANCASTERNHNE03/16/2002
603-503-9XXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERRTLANCASTERNHNE
603-503-XXXX7778MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLANCASTERASLANCASTERNH

Reports

Anonymous User from Venice, Florida

February 10, 2026 at 11:46 AM

603-503-3848 reported as a Robocall. Received on February 10, 2026 at 11:35 AM.
Call for Medical & prescriptions

Anonymous User from Wolfeboro, New Hampshire

September 15, 2025 at 2:25 PM

603-503-3538 reported as a Robocall. Received on September 15, 2025 at 2:23 PM.
Call for Medical & prescriptions

Anonymous User from , NH

May 16, 2025 at 3:52 PM

603-503-4953 reported as a Robocall. Received on May 15, 2025 at 3:07 PM.

Anonymous User from , NH

May 16, 2025 at 10:11 AM

603-503-4953 reported as a Robocall. Received on May 15, 2025 at 3:07 PM.
Call for Dropped call or no message

Anonymous User from , NH

January 17, 2025 at 11:07 AM

603-503-3522 reported as a Robocall. Received on January 16, 2025 at 6:41 PM.

Anonymous User from Nashua, New Hampshire

February 22, 2023 at 1:52 PM

603-503-1499 reported as a Robocall. Received on February 2, 2023 at 11:59 AM.
Call for Dropped call or no message

Most 'popular' numbers on this prefix:

603-503-1XXX: 603-503-1400 | 603-503-1408 | 603-503-1409 | 603-503-1491 | 603-503-1496 | 603-503-1499 |
603-503-2XXX: 603-503-2600 | 603-503-2606 | 603-503-2607 | 603-503-2609 | 603-503-2661 | 603-503-2663 |
603-503-3XXX: 603-503-3500 | 603-503-3508 | 603-503-3520 | 603-503-3522 | 603-503-3525 |
603-503-9XXX: 603-503-9300 | 603-503-9303 | 603-503-9309 |