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npa-nxxStateCompanyOCNRate CenterCLLIAssign DateMisc
281-331TXSOUTHWESTERN BELL9533ALVINALVNTXALDS000/00/0000Prefix Type: RBOC
Switch Name: ALVIN
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: Houston TX (560)
Tandem: N/A
Detailed Switch Info