Looking up a complete telephone number? Try Number Sleuth, a simplified interface for this lookup.

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
720-550COPAETEC ITEL, LLC0015247810RMD0038378829JDENVERDNVTCOUZ0MD06/25/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVTCOUZ0MD))
🕘 Prefix History
🔎 Explore Carrier Information
720-550 is split into 1,000-number blocks - detail below
720-550-0XXXCOCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (Verizon Communications)0017329715RMD00034326567DENVERAURRCO20AMD07/10/2013Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: AURRCO20AMD))
🕘 Prefix History
🔎 Explore Carrier Information
📡 Find related FCC/ISED radio licenses
720-550-1XXXCOCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (Verizon Communications)0017329715RMD00034326567DENVERAURRCO20AMD07/10/2013Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: AURRCO20AMD))
🕘 Prefix History
🔎 Explore Carrier Information
📡 Find related FCC/ISED radio licenses
720-550-2XXXCONEW CINGULAR WIRELESS PCS, LLC (AT&T)0003291192RMD00369096010DENVERDNVRCOMDCM708/07/2013Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMDCM7))
🕘 Prefix History
🔎 Explore Carrier Information
📡 Find related FCC/ISED radio licenses
720-550-3XXXCONEW CINGULAR WIRELESS PCS, LLC (AT&T)0003291192RMD00369096010DENVERDNVRCOMDCM707/08/2013Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMDCM7))
🕘 Prefix History
🔎 Explore Carrier Information
📡 Find related FCC/ISED radio licenses
720-550-4XXXCOPAETEC ITEL, LLC0015247810RMD0038378829JDENVERDNVTCOUZ0MD06/25/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVTCOUZ0MD))
🕘 Prefix History
🔎 Explore Carrier Information
720-550-5XXXCOPAETEC ITEL, LLC0015247810RMD0038378829JDENVERDNVTCOUZ0MD06/25/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVTCOUZ0MD))
🕘 Prefix History
🔎 Explore Carrier Information
720-550-6XXXCOCOMCAST IP PHONE, LLC (Comcast Corporation)0008497687RMD0003552318JDENVERDNVRCOMA39Z07/02/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMA39Z))
🕘 Prefix History
🔎 Explore Carrier Information
720-550-7XXXCOCOMCAST IP PHONE, LLC (Comcast Corporation)0008497687RMD0003552318JDENVERDNVRCOMA39Z07/02/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMA39Z))
🕘 Prefix History
🔎 Explore Carrier Information
720-550-8XXXCOCOMCAST IP PHONE, LLC (Comcast Corporation)0008497687RMD0003552318JDENVERDNVRCOMA39Z07/02/2013Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMA39Z))
🕘 Prefix History
🔎 Explore Carrier Information
720-550-9XXXCONEW CINGULAR WIRELESS PCS, LLC (AT&T)0003291192RMD00369096010DENVERDNVRCOMDCM707/08/2013Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Denver CO (656)
Tandem: N/A
🔧 Explore Switch(CLLI: DNVRCOMDCM7))
🕘 Prefix History
🔎 Explore Carrier Information
📡 Find related FCC/ISED radio licenses
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.