66.99.0.0/16

ip:	66.99.0.0 
loc:	United States, Springfield (Illinois)  
isp:	AS6325 Illinois Century Network » Illinois Century Network » Illinois Century Network 150.022 ms
route:	66.99.0.0/16, ILTN - Illinois Century Network, US (Springfield (Vinegar Hill)) ... 
reg:	66.99.0.0/16, US, ARIN, 2001-04-09
asn:	AS6325 - ILLINOIS-CENTURY Illinois Century Network, US
	  AS6939  - HURRICANE Hurricane Electric LLC, US
	  AS7018  - ATT-INTERNET4 AT&T Enterprises, LLC, US
	  AS22335 - MREN Metropolitan Research and Education Network, US
	  AS174   - COGENT-174 Cogent Communications, US
addr:	  120 W Jefferson Suite B Springfield IL 62702 US
online:	  692 » latency: 115 ms (130ms) 

see also:
   66.99.0.0/17     AS6325   ICN7 Illinois Century Network, US
   66.99.0.0/18     AS6325   ICN7 Illinois Century Network, US
   66.99.5.0/24     AS19480  ICN7 Illinois Century Network, US
   66.99.8.0/22     AS19941  ICN7 Illinois Century Network, US
   66.99.13.0/24    AS10308  ICN7 Illinois Century Network, US
   66.99.14.0/23    AS10308  ICN7 Illinois Century Network, US
   66.99.14.0/24    AS10308  ICN7 Illinois Century Network, US
   66.99.15.0/24    AS10308  ICN7 Illinois Century Network, US
   66.99.51.0/24    AS6325   ICN7 Illinois Century Network, US
   66.99.64.0/18    AS6325   ICN7 Illinois Century Network, US
   66.99.128.0/17   AS6325   ICN7 Illinois Century Network, US
   66.99.128.0/18   AS6325   ICN7 Illinois Century Network, US
   66.99.192.0/18   AS6325   ICN7 Illinois Century Network, US
   66.99.240.0/23   AS46286  ICN7 Illinois Century Network, US