137.200.0.0/19

ip:	137.200.0.0 
loc:	United States, Baltimore (Maryland)  
isp:	AS11985 Social Security Administration » Social Security Administration » Social Security Administration 2268.717 ms
route:	137.200.0.0/19, SSA - Social Security Administration, US (Baltimore) ... 
reg:	137.200.0.0/16, US, ARIN, 1990-01-03
asn:	AS11985 - ASN-SSA Social Security Administration, US
	  AS701   - UUNET Verizon Business, US
addr:	  6401 Security Boulevard Baltimore MD 21235 US
online:	  48 » latency: 97 ms (94ms) 

see also:
   137.200.0.0/18   AS11985  SSA Social Security Administration, US