167.144.0.0/16

ip:	167.144.0.0 
loc:	United States, Washington (District of Columbia)  
isp:	 » U.S. Customs and Border Protection » U.S. Customs and Border Protection 148.268 ms
route:	167.144.0.0/16, UCDC-Z - U.S. Customs and Border Protection, US (Washington D.C. (Northwest Washington)) ... 
reg:	167.144.0.0/16, US, ARIN, 1993-07-19
addr:	  1300 Pennsylvania Ave. NW Washington DC 20229 US
online:	  43 » latency: 136 ms (148ms) 

see also:
   167.144.1.0/24   AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.2.0/24   AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.11.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.12.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.25.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.26.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.64.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.65.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.66.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.68.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.69.0/24  AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US
   167.144.130.0/24 AS396921  CUSTOMS-GOV U.S. Customs and Border Protection, US