145.172.13 is a class C of IPs

Sample IPs from the class C 145.172.13

145.172.13.133	View precise location of 145.172.13.133 on the map!
145.172.13.5	View precise location of 145.172.13.5 on the map!
145.172.13.124	View precise location of 145.172.13.124 on the map!
145.172.13.96	View precise location of 145.172.13.96 on the map!
145.172.13.235	View precise location of 145.172.13.235 on the map!
145.172.13.194	View precise location of 145.172.13.194 on the map!
145.172.13.197	View precise location of 145.172.13.197 on the map!
145.172.13.198	View precise location of 145.172.13.198 on the map!
145.172.13.153	View precise location of 145.172.13.153 on the map!
145.172.13.93	View precise location of 145.172.13.93 on the map!
145.172.13.37	View precise location of 145.172.13.37 on the map!

10 Random IPs

246.13.242.12	Find precise map location of 246.13.242.12
40.2.98.101	Find precise map location of 40.2.98.101
52.212.210.181	Find precise map location of 52.212.210.181
38.113.15.25	Find precise map location of 38.113.15.25
18.68.168.133	Find precise map location of 18.68.168.133
218.43.87.190	Find precise map location of 218.43.87.190
81.141.216.221	Find precise map location of 81.141.216.221
19.12.84.25	Find precise map location of 19.12.84.25
195.40.85.158	Find precise map location of 195.40.85.158
63.116.147.231	Find precise map location of 63.116.147.231
24.175.12.221	Find precise map location of 24.175.12.221

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