51.198.121 is a class C of IPs

Sample IPs from the class C 51.198.121

51.198.121.213	View precise location of 51.198.121.213 on the map!
51.198.121.153	View precise location of 51.198.121.153 on the map!
51.198.121.135	View precise location of 51.198.121.135 on the map!
51.198.121.5	View precise location of 51.198.121.5 on the map!
51.198.121.1	View precise location of 51.198.121.1 on the map!
51.198.121.212	View precise location of 51.198.121.212 on the map!
51.198.121.50	View precise location of 51.198.121.50 on the map!
51.198.121.237	View precise location of 51.198.121.237 on the map!
51.198.121.119	View precise location of 51.198.121.119 on the map!
51.198.121.60	View precise location of 51.198.121.60 on the map!
51.198.121.58	View precise location of 51.198.121.58 on the map!

10 Random IPs

159.132.64.209	Find precise map location of 159.132.64.209
149.148.200.192	Find precise map location of 149.148.200.192
126.6.29.112	Find precise map location of 126.6.29.112
114.233.148.161	Find precise map location of 114.233.148.161
22.209.182.19	Find precise map location of 22.209.182.19
66.94.83.43	Find precise map location of 66.94.83.43
15.208.85.65	Find precise map location of 15.208.85.65
216.65.182.231	Find precise map location of 216.65.182.231
171.187.147.169	Find precise map location of 171.187.147.169
168.132.140.107	Find precise map location of 168.132.140.107
144.175.162.136	Find precise map location of 144.175.162.136

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