251.51.204 is a class C of IPs

Sample IPs from the class C 251.51.204

251.51.204.184	View precise location of 251.51.204.184 on the map!
251.51.204.246	View precise location of 251.51.204.246 on the map!
251.51.204.227	View precise location of 251.51.204.227 on the map!
251.51.204.42	View precise location of 251.51.204.42 on the map!
251.51.204.168	View precise location of 251.51.204.168 on the map!
251.51.204.117	View precise location of 251.51.204.117 on the map!
251.51.204.214	View precise location of 251.51.204.214 on the map!
251.51.204.29	View precise location of 251.51.204.29 on the map!
251.51.204.176	View precise location of 251.51.204.176 on the map!
251.51.204.78	View precise location of 251.51.204.78 on the map!
251.51.204.249	View precise location of 251.51.204.249 on the map!

10 Random IPs

6.246.61.227	Find precise map location of 6.246.61.227
230.218.149.26	Find precise map location of 230.218.149.26
134.138.193.48	Find precise map location of 134.138.193.48
96.94.93.35	Find precise map location of 96.94.93.35
79.78.176.115	Find precise map location of 79.78.176.115
69.41.210.142	Find precise map location of 69.41.210.142
223.167.115.226	Find precise map location of 223.167.115.226
63.15.31.45	Find precise map location of 63.15.31.45
181.3.89.20	Find precise map location of 181.3.89.20
145.47.163.85	Find precise map location of 145.47.163.85
248.181.165.83	Find precise map location of 248.181.165.83

TestURI.org is a free web-sniffer.net alternative. It alows you to send custom HTTP request and check the HTTP response.