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
301-769MDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212LEONARDTNMLTWMDMLRS000/00/0000Prefix Type: RBOC
Switch Name: LEONARDTOWN
Switch Type: WECO 5ESS Remote (5A RSM)
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: MLTWMDMLRS0))
301-769 is split into 1,000-number blocks - detail below
301-769-0XXXMDQUANTUM TELECOMMUNICATIONS, INC. - MD0007761273RMD00029172596LEONARDTNNOCLLIKNOWN10/23/2003Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-769-1XXXMDNEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)0003291192RMD00369094036LEONARDTNBTVLMD18GT012/18/2003Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: BTVLMD18GT0))
301-769-2XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212LEONARDTNMLTWMDMLRS0N/APrefix Type: RBOC
Switch Name: LEONARDTOWN
Switch Type: WECO 5ESS Remote (5A RSM)
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: MLTWMDMLRS0))
301-769-3XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212LEONARDTNMLTWMDMLRS0N/APrefix Type: RBOC
Switch Name: LEONARDTOWN
Switch Type: WECO 5ESS Remote (5A RSM)
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: MLTWMDMLRS0))
301-769-4XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212LEONARDTNMLTWMDMLRS0N/APrefix Type: RBOC
Switch Name: LEONARDTOWN
Switch Type: WECO 5ESS Remote (5A RSM)
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: MLTWMDMLRS0))
301-769-5XXXMDMCIMETRO ACCESS TRANSMISSION SERVICES LLC0004999405RMD00029577229LEONARDTNWASKDCFNPS007/20/2005Prefix Type: CLEC
Switch Name: WASHINGTON
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: WASKDCFNPS0))
301-769-6XXXMDMCIMETRO ACCESS TRANSMISSION SERVICES LLC0004999405RMD00029577229LEONARDTNWASKDCFNPS007/20/2005Prefix Type: CLEC
Switch Name: WASHINGTON
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: WASKDCFNPS0))
301-769-7XXXMDONVOY, LLC - MD (Sinch)0004323028RMD0001966876DLEONARDTNNOCLLIKNOWN07/19/2022Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-769-8XXXMDNEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)0003291192RMD00369094036LEONARDTNBTVLMD18GT012/18/2003Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: BTVLMD18GT0))
301-769-9XXXMDNEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)0003291192RMD00369094036LEONARDTNBTVLMD18GT002/12/2016Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: N/A
Tandem: N/A
🔧 Explore Switch(CLLI: BTVLMD18GT0))
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.