18.78.21 is a class C of IPs

Sample IPs from the class C 18.78.21

18.78.21.161	View precise location of 18.78.21.161 on the map!
18.78.21.248	View precise location of 18.78.21.248 on the map!
18.78.21.36	View precise location of 18.78.21.36 on the map!
18.78.21.249	View precise location of 18.78.21.249 on the map!
18.78.21.14	View precise location of 18.78.21.14 on the map!
18.78.21.212	View precise location of 18.78.21.212 on the map!
18.78.21.73	View precise location of 18.78.21.73 on the map!
18.78.21.190	View precise location of 18.78.21.190 on the map!
18.78.21.116	View precise location of 18.78.21.116 on the map!
18.78.21.143	View precise location of 18.78.21.143 on the map!
18.78.21.123	View precise location of 18.78.21.123 on the map!

10 Random IPs

87.101.16.81	Find precise map location of 87.101.16.81
183.204.95.154	Find precise map location of 183.204.95.154
229.252.39.30	Find precise map location of 229.252.39.30
29.161.151.148	Find precise map location of 29.161.151.148
27.24.47.199	Find precise map location of 27.24.47.199
230.86.140.141	Find precise map location of 230.86.140.141
191.198.118.88	Find precise map location of 191.198.118.88
81.18.246.121	Find precise map location of 81.18.246.121
47.51.193.53	Find precise map location of 47.51.193.53
155.10.108.51	Find precise map location of 155.10.108.51
149.219.59.74	Find precise map location of 149.219.59.74

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