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
616-691MIMICHIGAN BELL TEL CO (AT&T)9323GRATTANGRTNMIMNRSA00/00/0000Prefix Type: RBOC
Switch Name: GRATTAN
Switch Type: N/A
LATA: Grand Rapids MI (348)
Tandem: GDRPMIBL10T
Detailed Switch Info
Thousands block for 616-691
616-691-7MIMICHIGAN BELL TEL CO (AT&T)9323GRATTANGRTNMIMNRSAN/APrefix Type: RBOC
Switch Name: GRATTAN
Switch Type: N/A
LATA: Grand Rapids MI (348)
Tandem: GDRPMIBL10T
Detailed Switch Info
616-691-8MIMICHIGAN BELL TEL CO (AT&T)9323GRATTANGRTNMIMNRSAN/APrefix Type: RBOC
Switch Name: GRATTAN
Switch Type: N/A
LATA: Grand Rapids MI (348)
Tandem: GDRPMIBL10T
Detailed Switch Info
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