183.173.0.0/16

ip:	183.173.0.0 
loc:	China, Beijing (Beijing)  
isp:	AS4538 China Education and Research Network Center » CERNET »  133.732 ms
route:	183.173.0.0/16, BJR-CERNET - China Education and Research Network, CN (Haidian (Haidian Qu)) ... 
reg:	183.172.0.0/14, CN, APNIC, 2009-11-25
asn:	AS4538 - ERX-CERNET-BKB China Education and Research Network Center, CN
	  AS4635  - HKIX-RS1 Hong Kong Internet Exchange--Route Server 1, HK
	  AS4837  - CHINA169-Backbone CHINA UNICOM China169 Backbone, CN
addr:	  Network Research Center Main Bldg Tsinghua Univ Beijing 100084 China
online:	  4.168 » latency: 322 ms (346ms) 

see also:
   183.172.0.0/14   AS4538   BJR-CERNET China Education and Research Network, CN
   183.172.0.0/15   AS24348  BJR-CERNET China Education and Research Network, CN
   183.172.0.0/15   AS4538   BJR-CERNET China Education and Research Network, CN