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
206-303WAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS600/00/0000Prefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303 is split into 1,000-number blocks - detail below
206-303-0XXXWAT-MOBILE USA, INC. (T-Mobile US, Inc)0006945950RMD00042096529SEATTLESTTLWA060MD03/03/2006Prefix Type: PCS
Switch Name: SEATTLE
Switch Type: N/A
LATA: Seattle WA (674)
Tandem: N/A
🔧 Explore Switch(CLLI: STTLWA060MD))
206-303-1XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-2XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-3XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-4XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-5XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-6XXXWAQWEST CORPORATION0003746757RMD00063899638SEATTLESTTLWA06DS6N/APrefix Type: RBOC
Switch Name: SEATTLE MAIN DS6
Switch Type: Northern Telecom DMS100 (Digital)
LATA: Seattle WA (674)
Tandem: STTLWA06C9T
🔧 Explore Switch(CLLI: STTLWA06DS6))
206-303-7XXXWANEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)0003291192RMD00369096010SEATTLETACNWADNCM607/03/2003Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Seattle WA (674)
Tandem: N/A
🔧 Explore Switch(CLLI: TACNWADNCM6))
206-303-8XXXWANEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)0003291192RMD00369096010SEATTLETACNWADNCM607/03/2003Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Seattle WA (674)
Tandem: N/A
🔧 Explore Switch(CLLI: TACNWADNCM6))
206-303-9XXXWANEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)0003291192RMD00369096010SEATTLETACNWADNCM607/03/2003Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Seattle WA (674)
Tandem: N/A
🔧 Explore Switch(CLLI: TACNWADNCM6))
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.