12.153.243.0/24

ip:	12.153.243.0 
loc:	United States, St. Helena (California)  
isp:	AS393508 PERSONAL NETWORK COMPUTING » Personal Network Computing » AT&T Enterprises 688.905 ms
route:	12.153.243.0/24, PERSONAL939-242 - PERSONAL NETWORK COMPUTING, US (New York) ... 
reg:	12.0.0.0/8, US, ARIN, 1983-08-23
asn:	AS393508 - VALLEYINTERNET PERSONAL NETWORK COMPUTING, US
addr:	  1775 WHITEHALL LN SH CA 94574 US
online:	  55 » latency: 178 ms (178ms) 

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