12.147.152.0/24

ip:	12.147.152.0 
loc:	United States, Irving (Texas)  
isp:	AS62958 ADT LLC » AT&T Services » Protection ONE Alarm Monitoring 826.007 ms
route:	12.147.152.0/24, NET12 - American Registry for Internet Numbers, US (Irving (Las Colinas)) ... 
reg:	12.0.0.0/8, US, ARIN, 1983-08-23
asn:	AS62958 - ADT-LLC ADT LLC, US
addr:	  PO Box 232290 Centreville VA 20120 US
online:	  28 » latency: 144 ms (144ms) 

see also:
   12.0.0.0/8       AS7018   NET12 American Registry for Internet Numbers, US
   12.128.0.0/9     AS7018   NET12 American Registry for Internet Numbers, US