NPA
NXX
CLLI
City, ST
Telco
815
465
GRPKILGPRS1
GRANT PARK
AMERITECH ILLINOIS
815
466
GRPKILGPRS1
GRANT PARK
AMERITECH ILLINOIS
815
550
CHCGILABDS0
GRANT PARK
FOCAL COMMUNICATIONS CORP OF ILLINOIS
815
605
CHCGIL24DS4
GRANT PARK
ICG TELECOM GROUP - IL