166.136.192.0/22

ip:	166.136.192.0 mobile-166-136-192-000.mycingular.net
loc:	United States, Dallas (Texas)  
isp:	AS20057 AT&T Enterprises, LLC » AT&T Enterprises, LLC » AT&T Enterprises, LLC 1824.81 ms
route:	166.136.192.0/22, AEL-360 - AT&T Enterprises, LLC, US (Dallas) ... 
reg:	166.136.0.0/15, US, ARIN, 2025-04-01
asn:	AS20057 - ATT-MOBILITY-LLC-AS20057 AT&T Wireless Service, US
	  AS7018  - ATT-INTERNET4 AT&T Enterprises, LLC, US
addr:	  PO Box 1381 Doylestown PA 18901 US
online:	  26 » latency: 328 ms (327ms) 

see also:
   166.136.0.0/16   AS20057  AEL-360 AT&T Enterprises, LLC, US