136.51.64.0/20

ip:	136.51.64.0 136-51-64-0.googlefiber.net
loc:	United States, San Antonio (Texas)  
isp:	AS16591 Google Fiber Inc. » Google Fiber Inc. » Google Fiber 143.137 ms
route:	136.51.64.0/20, GFIBER-V4 - Google Fiber Inc., US (San Antonio) ... 
reg:	136.32.0.0/11, US, ARIN, 2015-10-06
asn:	AS16591 - GOOGLE-FIBER Google Fiber Inc., US
	  AS3356  - LEVEL3 Level 3 Parent, LLC, US
addr:	  
online:	  1.009 » latency: 160 ms (174ms) 

see also:
   136.32.0.0/11    AS16591  GOOGLE-FIBER Google Fiber Inc., US