Company Name: State/Province:
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-nxxStateCompanyFRNRMDOCNRate CenterCLLIAssign DateMisc
605-269 is split into 1,000-number blocks - detail below
605-269-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GSPEARFISHNOCLLIKNOWN08/09/2012Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-308 is split into 1,000-number blocks - detail below
605-308-5XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GNOSIOUX CYNOCLLIKNOWN08/17/2022Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Sioux City IA (630)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-450 is split into 1,000-number blocks - detail below
605-450-3XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GREDFIELDNOCLLIKNOWN11/02/2015Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-461 is split into 1,000-number blocks - detail below
605-461-5XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GHURONNOCLLIKNOWN09/18/2012Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-499 is split into 1,000-number blocks - detail below
605-499-3XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GSTURGISNOCLLIKNOWN07/24/2020Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-550 is split into 1,000-number blocks - detail below
605-550-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GMITCHELLNOCLLIKNOWN02/19/2016Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-622 is split into 1,000-number blocks - detail below
605-622-1XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GABERDEENNOCLLIKNOWN02/12/2016Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-646 is split into 1,000-number blocks - detail below
605-646-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GRAPID CITYNOCLLIKNOWN07/09/2012Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-653 is split into 1,000-number blocks - detail below
605-653-7XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GYANKTONNOCLLIKNOWN09/11/2018Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-699 is split into 1,000-number blocks - detail below
605-699-2XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GBELLEFORCHNOCLLIKNOWN07/16/2020Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-730 is split into 1,000-number blocks - detail below
605-730-7XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GCHAMBERLANNOCLLIKNOWN02/09/2017Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-741 is split into 1,000-number blocks - detail below
605-741-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GVERMILLIONNOCLLIKNOWN03/07/2018Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-776 is split into 1,000-number blocks - detail below
605-776-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GPIERRENOCLLIKNOWN02/05/2014Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-777 is split into 1,000-number blocks - detail below
605-777-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GHARISBGTEANOCLLIKNOWN03/14/2018Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-906SDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GSIOUX FLSSXFLSDCOXMD02/06/2012Prefix Type: CLEC
Switch Name: RAPID CITY
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: SXFLSDCOXMD))
🕘 Prefix History
🔎 Explore Carrier Information
605-906 is split into 1,000-number blocks - detail below
605-906-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GSIOUX FLSSXFLSDCOXMD02/06/2012Prefix Type: CLEC
Switch Name: RAPID CITY
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: SXFLSDCOXMD))
🕘 Prefix History
🔎 Explore Carrier Information
605-910 is split into 1,000-number blocks - detail below
605-910-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GSIOUX FLSNOCLLIKNOWN11/04/2021Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-924 is split into 1,000-number blocks - detail below
605-924-5XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GMILBANKNOCLLIKNOWN07/28/2020Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-954 is split into 1,000-number blocks - detail below
605-954-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GWATERTOWNNOCLLIKNOWN08/02/2017Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-974 is split into 1,000-number blocks - detail below
605-974-6XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GRAPID CITYNOCLLIKNOWN05/19/2025Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
605-974-7XXXSDTELEPORT COMMUNICATIONS AMERICA SD-LLC (AT&T)N/A693GRAPID CITYNOCLLIKNOWN05/19/2025Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: South Dakota (640)
Tandem: N/A
🔧 Explore Switch(CLLI: NOCLLIKNOWN))
🕘 Prefix History
🔎 Explore Carrier Information
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.