136.51.0.0/20

ip:	136.51.0.0 136-51-0-0.googlefiber.net
loc:	United States, San Antonio (Texas)  
isp:	AS16591 Google Fiber Inc. » Google Fiber Inc. » Google Fiber 1.699 ms
route:	136.51.0.0/20, 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
	  AS6939  - HURRICANE Hurricane Electric LLC, US
	  AS3356  - LEVEL3 Level 3 Parent, LLC, US
addr:	  1600 Amphitheatre Parkway Mountain View CA 94043 US
online:	  1.055 » latency: 152 ms (184ms) 

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