155.166.68.0/22

ip:	155.166.68.0 mobile-155-166-68-0.mycingular.net
loc:	United States, Dallas (Texas)  
isp:	AS20057 AT&T Enterprises, LLC » AT&T Enterprises, LLC » AT&T Enterprises, LLC 129.027 ms
route:	155.166.68.0/22, ATT-MOBILITY-LLC-155-166-0-0 - AT&T Enterprises, LLC, US (Ashburn) ... 
reg:	155.166.0.0/16, US, ARIN, 1992-03-24
asn:	AS20057 - ATT-MOBILITY-LLC-AS20057 AT&T Wireless Service, US
	  AS7018  - ATT-INTERNET4 AT&T Enterprises, LLC, US
addr:	  5302 HARRY HINES BLVD Dallas TX 75235 US
online:	  156 » latency: 263 ms (264ms) 

see also:
   155.166.0.0/16   AS20057  ATT-MOBILITY-LLC-155-166-0-0 AT&T Enterprises, LLC, US
   155.166.0.0/17   AS20057  ATT-MOBILITY-LLC-155-166-0-0 AT&T Enterprises, LLC, US