Input an Area Code (required) followed by the Prefix, or Exchange (optional):
-
If you were a paid member, you could be loading this into any version of Excel or Access (or any other software that understands CSV) right now for less than you paid for your breakfast or lunch today. If you are a member please login to access this and other functionality.

🔎 Tip: Click any Company, OCN, Rate Center, or CLLI to explore related telecom data

npa-nxxState/ProvinceCompanyFRNRMDOCNRate CenterCLLIAssign DateMisc
410-847MDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212TOWSONTWSNMDTWDS000/00/0000Prefix Type: RBOC
Switch Name: TOWSON
Switch Type: WECO 5ESS (Digital)
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-847 is split into 1,000-number blocks - detail below
410-847-0XXXMDONVOY SPECTRUM, LLC (Sinch)0024415002RMD0002045624HTOWSONNOCLLIKNOWN09/24/2024Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-847-1XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212TOWSONTWSNMDTWDS0N/APrefix Type: RBOC
Switch Name: TOWSON
Switch Type: WECO 5ESS (Digital)
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-847-2XXXMDONVOY, LLC - MD (Sinch)0004323028RMD0001966876DTOWSONNOCLLIKNOWN01/29/2016Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-847-3XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212TOWSONTWSNMDTWDS0N/APrefix Type: RBOC
Switch Name: TOWSON
Switch Type: WECO 5ESS (Digital)
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-847-4XXXMDNEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)0003291192RMD00369094036TOWSONCLMAMDORGT011/11/2016Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-847-5XXXMDNEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)0003291192RMD00369094036TOWSONCLMAMDORGT011/11/2016Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-847-6XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212TOWSONTWSNMDTWDS0N/APrefix Type: RBOC
Switch Name: TOWSON
Switch Type: WECO 5ESS (Digital)
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-847-7XXXMDPEERLESS NETWORK OF MARYLAND, LLCN/A568GTOWSONNOCLLIKNOWN02/26/2019Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-847-8XXXMDTERRA NOVA TELECOM INC.0021193057RMD0001495145JTOWSONNOCLLIKNOWN07/01/2025Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-847-9XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212TOWSONTWSNMDTWDS0N/APrefix Type: RBOC
Switch Name: TOWSON
Switch Type: WECO 5ESS (Digital)
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: TWSNMDTWDS0))
This information is not guaranteed to be accurate. User assumes all risk for any loss or gain resulting from use of this data.
Although I strive for accuracy and prompt updates of changed information, it is possible that there may be errors. If you see one, could you please report it?
Please report all errors, flames, questions, suggestions, and thanks to Paul Timmins
L'exactitude de ces renseignements n'est pas garantie. L'utilisateur assume l'entière responsabilité des pertes ou des gains découlant de l'utilisation de ces données.
Bien que je m'efforce d'assurer l'exactitude des informations et de les mettre à jour rapidement, des erreurs peuvent subsister. Si vous en voyez une, veuillez me la signaler.
Veuillez adresser vos commentaires, remarques, questions, suggestions et remerciements à Paul Timmins
Please see the Frequently Asked Questions page if you have any questions.
Copyright ©2001-2026, Paul Timmins/Timmins Technologies, LLC. All rights reserved
Website Design and User Interface ©2010, Adam Botbyl/Revolutionary Solutions, LLC.
Colocation generously provided by Clear Rate Communications, Inc
Has this site changed your life? Made your job easier? I always love Fanmail and Suggestions.