12.17.158.0/24

ip:	12.17.158.0 
loc:	United States, Chicago (Illinois)  
isp:	AS17117 RITSnet, Inc. » AT&T Services » Ritsnet 2258.607 ms
route:	12.17.158.0/24, ATT-NET-12-17-158-0 - RITSnet, Inc., US (Newark) ... 
reg:	12.0.0.0/8, US, ARIN, 1983-08-23
asn:	AS17117 - RITSNET RITSnet Inc., US
addr:	  39899 Balentine Drive Suite 138 Newark CA 94560 US
online:	  1 » latency: 215 ms (215ms) 

see also:
   12.0.0.0/8       AS7018   NET12 American Registry for Internet Numbers, US
   12.0.0.0/9       AS7018   NET12 American Registry for Internet Numbers, US