12.72.0.0/17

ip:	12.72.0.0 
loc:	United States, New York (New York)  
isp:	AS20057 AT&T Enterprises, LLC » AT&T Enterprises » AT&T Worldnet Services 746.556 ms
route:	12.72.0.0/17, ATTSVC-12-72-0-0 - AT&T Worldnet Services, US (New York) ... 
reg:	12.0.0.0/8, US, ARIN, 1983-08-23
asn:	AS20057 - ATT-MOBILITY-LLC-AS20057 AT&T Wireless Service, US
addr:	  412 Mount Kemble Ave. P.O. Box 1995 Morristown NJ 7962 US
online:	  162 » latency: 107 ms (234ms) 

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