Warning: site is in maintainance mode, data may not be accurate and some queries may not work!
Input a CLLI:

Tip: A Partial CLLI can be entered, but must contain a minimum of the first 6 characters. I.E. 'DLLSTX'

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.
npa-nxxStateCompanyOCNRate CenterCLLIAssign DateMisc
773-261ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
Thousands block for 773-261
773-261-0ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-1ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-2ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-3ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-4ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-5ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-6ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-261-7ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
Thousands block for 773-378
773-378-0ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-1ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-2ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-3ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-4ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-5ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-6ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
773-378-8ILILLINOIS BELL TEL CO (AT&T)9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: N/A
Tandem: N/A
Detailed Switch Info
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
Please see the Frequently Asked Questions page if you have any questions.
Copyright ©2001-2023, 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.