137.112.21 is a class C of IPs

Sample IPs from the class C 137.112.21

137.112.21.18	View precise location of 137.112.21.18 on the map!
137.112.21.82	View precise location of 137.112.21.82 on the map!
137.112.21.158	View precise location of 137.112.21.158 on the map!
137.112.21.220	View precise location of 137.112.21.220 on the map!
137.112.21.4	View precise location of 137.112.21.4 on the map!
137.112.21.8	View precise location of 137.112.21.8 on the map!
137.112.21.114	View precise location of 137.112.21.114 on the map!
137.112.21.167	View precise location of 137.112.21.167 on the map!
137.112.21.36	View precise location of 137.112.21.36 on the map!
137.112.21.14	View precise location of 137.112.21.14 on the map!
137.112.21.70	View precise location of 137.112.21.70 on the map!

10 Random IPs

183.174.67.65	Find precise map location of 183.174.67.65
146.230.221.137	Find precise map location of 146.230.221.137
238.77.120.107	Find precise map location of 238.77.120.107
66.27.85.64	Find precise map location of 66.27.85.64
227.28.150.236	Find precise map location of 227.28.150.236
3.14.188.95	Find precise map location of 3.14.188.95
235.132.27.121	Find precise map location of 235.132.27.121
236.199.60.23	Find precise map location of 236.199.60.23
28.146.154.42	Find precise map location of 28.146.154.42
39.11.28.239	Find precise map location of 39.11.28.239
9.73.143.167	Find precise map location of 9.73.143.167

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