91.73.4 is a class C of IPs

Sample IPs from the class C 91.73.4

91.73.4.9	View precise location of 91.73.4.9 on the map!
91.73.4.103	View precise location of 91.73.4.103 on the map!
91.73.4.205	View precise location of 91.73.4.205 on the map!
91.73.4.188	View precise location of 91.73.4.188 on the map!
91.73.4.238	View precise location of 91.73.4.238 on the map!
91.73.4.71	View precise location of 91.73.4.71 on the map!
91.73.4.95	View precise location of 91.73.4.95 on the map!
91.73.4.92	View precise location of 91.73.4.92 on the map!
91.73.4.245	View precise location of 91.73.4.245 on the map!
91.73.4.173	View precise location of 91.73.4.173 on the map!
91.73.4.61	View precise location of 91.73.4.61 on the map!

10 Random IPs

172.221.210.180	Find precise map location of 172.221.210.180
215.101.247.168	Find precise map location of 215.101.247.168
213.110.109.16	Find precise map location of 213.110.109.16
151.21.9.175	Find precise map location of 151.21.9.175
99.56.45.193	Find precise map location of 99.56.45.193
69.198.97.117	Find precise map location of 69.198.97.117
2.195.167.32	Find precise map location of 2.195.167.32
67.120.206.217	Find precise map location of 67.120.206.217
189.57.12.129	Find precise map location of 189.57.12.129
156.152.187.87	Find precise map location of 156.152.187.87
22.132.97.43	Find precise map location of 22.132.97.43

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