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
815-943ILILLINOIS BELL TEL CO (AT&T)9329HARVARDHRVRILHVRS000/00/0000Prefix Type: RBOC
Switch Name: HARVARD
Switch Type: N/A
LATA: Chicago IL METRO (358)
Tandem: NBRKILNT55T
Detailed Switch Info