166.58.4 is a class C of IPs

Sample IPs from the class C 166.58.4

166.58.4.143	View precise location of 166.58.4.143 on the map!
166.58.4.94	View precise location of 166.58.4.94 on the map!
166.58.4.209	View precise location of 166.58.4.209 on the map!
166.58.4.51	View precise location of 166.58.4.51 on the map!
166.58.4.53	View precise location of 166.58.4.53 on the map!
166.58.4.40	View precise location of 166.58.4.40 on the map!
166.58.4.160	View precise location of 166.58.4.160 on the map!
166.58.4.98	View precise location of 166.58.4.98 on the map!
166.58.4.91	View precise location of 166.58.4.91 on the map!
166.58.4.144	View precise location of 166.58.4.144 on the map!
166.58.4.103	View precise location of 166.58.4.103 on the map!

10 Random IPs

126.67.123.56	Find precise map location of 126.67.123.56
202.9.171.163	Find precise map location of 202.9.171.163
184.25.140.169	Find precise map location of 184.25.140.169
125.240.195.204	Find precise map location of 125.240.195.204
238.27.201.217	Find precise map location of 238.27.201.217
161.88.236.130	Find precise map location of 161.88.236.130
144.66.251.191	Find precise map location of 144.66.251.191
140.135.34.254	Find precise map location of 140.135.34.254
125.98.231.69	Find precise map location of 125.98.231.69
111.122.118.212	Find precise map location of 111.122.118.212
224.205.170.46	Find precise map location of 224.205.170.46

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