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
641-892IAFRONTIER COMMUNICATIONS OF IOWA, INC. (Frontier Communications)1127SHEFFIELDSHFDIAXRDS000/00/0000Prefix Type: ICO
Switch Name: SHEFFIELD
Switch Type: Northern Telecom DMS10 (Digital)
LATA: Des Moines IA (632)
Tandem: N/A
Detailed Switch Info
Thousands block for 641-892
641-892-0IAFRONTIER COMMUNICATIONS OF IOWA, INC. (Frontier Communications)1127SHEFFIELDSHFDIAXRDS0N/APrefix Type: ICO
Switch Name: SHEFFIELD
Switch Type: Northern Telecom DMS10 (Digital)
LATA: Des Moines IA (632)
Tandem: N/A
Detailed Switch Info
641-892-4IAFRONTIER COMMUNICATIONS OF IOWA, INC. (Frontier Communications)1127SHEFFIELDSHFDIAXRDS0N/APrefix Type: ICO
Switch Name: SHEFFIELD
Switch Type: Northern Telecom DMS10 (Digital)
LATA: Des Moines IA (632)
Tandem: N/A
Detailed Switch Info
641-892-8IAFRONTIER COMMUNICATIONS OF IOWA, INC. (Frontier Communications)1127SHEFFIELDSHFDIAXRDS0N/APrefix Type: ICO
Switch Name: SHEFFIELD
Switch Type: Northern Telecom DMS10 (Digital)
LATA: Des Moines IA (632)
Tandem: N/A
Detailed Switch Info