Input a CLLI:

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

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🔎 Tip: Click any Company, OCN, Rate Center, or CLLI to explore related telecom data

npa-nxxStateCompanyFRNRMDOCNRate CenterCLLIAssign DateMisc
773-261ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261 is split into 1,000-number blocks - detail below
773-261-0XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-1XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-2XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-3XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-4XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-5XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-6XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-261-7XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-287ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378 is split into 1,000-number blocks - detail below
773-378-0XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-1XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-2XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-3XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-5XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-6XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-378-8XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379 is split into 1,000-number blocks - detail below
773-379-0XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379-1XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379-2XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379-3XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379-4XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-379-7XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-473ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854 is split into 1,000-number blocks - detail below
773-854-0XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-1XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-2XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-3XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-4XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-5XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-6XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-854-8XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921ILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP000/00/0000Prefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921 is split into 1,000-number blocks - detail below
773-921-0XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-1XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-3XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-4XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-6XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-8XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
773-921-9XXXILILLINOIS BELL TEL CO (AT&T)N/A9329CHICGOZN05CHCGILAURP0N/APrefix Type: RBOC
Switch Name: CHCZ 5
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: N/A
🔧 Explore Switch(CLLI: CHCGILAURP0))
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