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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npa-nxxStateCompanyOCNRate CenterCLLIAssign DateMisc
815-923ILILLINOIS BELL TEL CO (AT&T)9329UNIONUNINILUNRS000/00/0000Prefix Type: RBOC
Switch Name: UNION
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: NBRKILNT55T
Detailed Switch Info
Thousands block for 815-923
815-923-2ILILLINOIS BELL TEL CO (AT&T)9329UNIONUNINILUNRS0N/APrefix Type: RBOC
Switch Name: UNION
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: NBRKILNT55T
Detailed Switch Info
815-923-4ILILLINOIS BELL TEL CO (AT&T)9329UNIONUNINILUNRS0N/APrefix Type: RBOC
Switch Name: UNION
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: NBRKILNT55T
Detailed Switch Info
815-923-7ILTERRA NOVA TELECOM INC.145JUNIONUNINILUNRS010/17/2023Prefix Type: IPES
Switch Name: UNION
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: NBRKILNT55T
Detailed Switch Info