210.31.136.0/21

ip:	210.31.136.0 
loc:	China, Qingtuozi (Tianjin)  
isp:	AS4538 China Education and Research Network Center » TJLIU »  2323.55 ms
route:	210.31.136.0/21, CERNET-CN - China Education and Research Network, CN (Qingtuozi (Binhai Xinqu)) ... 
reg:	210.28.0.0/14, CN, APNIC, 1998-08-31
asn:	AS4538 - ERX-CERNET-BKB China Education and Research Network Center, CN
	  AS4837  - CHINA169-Backbone CHINA UNICOM China169 Backbone, CN
addr:	  Network Research Center Main Bldg Tsinghua Univ Beijing 100084 China
online:	  2 » latency: 262 ms (262ms) 

see also:
   210.28.0.0/14    AS4538   CERNET-CN China Education and Research Network, CN
   210.31.128.0/17  AS4538   CERNET-CN China Education and Research Network, CN
   210.31.128.0/20  AS4538   CERNET-CN China Education and Research Network, CN