12.72.32.0/21

ip:	12.72.32.0 
loc:	United States, Laurel (Delaware)  
isp:	AS20057 AT&T Enterprises, LLC » AT&T Enterprises » AT&T Worldnet Services 1005.923 ms
route:	12.72.32.0/21, ATTSVC-12-72-0-0 - AT&T Worldnet Services, US (Miami) ... 
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:	  4 » latency: 132 ms (147ms) 

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
   12.72.0.0/17     AS20057  ATTSVC-12-72-0-0 AT&T Worldnet Services, US