Warning: site is in maintainance mode, data may not be accurate and some queries may not work!
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
510-324CAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS000/00/0000Prefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324 is split into 1,000-number blocks - detail below
510-324-0XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-1XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-2XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-3XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-4XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-5XXXCAMETROPCS, INC. (T-Mobile US, Inc)N/A5562FRNK GRNLFOKLECAZVGT005/08/2018Prefix Type: PCS
Switch Name: N/A
Switch Type: N/A
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: OKLECAZVGT0))
510-324-6XXXCANEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)0003291192RMD00369096010FRNK GRNLFSNTDCAUJCM906/16/2014Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: SNTDCAUJCM9))
510-324-7XXXCASONIC TELECOM, LLC - CA0016079766RMD0001812433EFRNK GRNLFNOCLLIKNOWN11/28/2012Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
510-324-8XXXCAPACIFIC BELL (AT&T)N/A9740FRNK GRNLFUNCYCA11DS0N/APrefix Type: RBOC
Switch Name: UNION CITY
Switch Type: WECO 5ESS (Digital)
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: UNCYCA11DS0))
510-324-9XXXCABANDWIDTH.COM CLEC, LLC - CA0017042060RMD0003709981EFRNK GRNLFNOCLLIKNOWN06/19/2014Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
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.