15.141.21 is a class C of IPs

Sample IPs from the class C 15.141.21

15.141.21.7	View precise location of 15.141.21.7 on the map!
15.141.21.160	View precise location of 15.141.21.160 on the map!
15.141.21.142	View precise location of 15.141.21.142 on the map!
15.141.21.242	View precise location of 15.141.21.242 on the map!
15.141.21.34	View precise location of 15.141.21.34 on the map!
15.141.21.223	View precise location of 15.141.21.223 on the map!
15.141.21.207	View precise location of 15.141.21.207 on the map!
15.141.21.194	View precise location of 15.141.21.194 on the map!
15.141.21.253	View precise location of 15.141.21.253 on the map!
15.141.21.50	View precise location of 15.141.21.50 on the map!
15.141.21.25	View precise location of 15.141.21.25 on the map!

10 Random IPs

95.16.124.84	Find precise map location of 95.16.124.84
92.234.253.210	Find precise map location of 92.234.253.210
104.1.3.95	Find precise map location of 104.1.3.95
32.172.124.34	Find precise map location of 32.172.124.34
162.246.55.105	Find precise map location of 162.246.55.105
73.97.75.5	Find precise map location of 73.97.75.5
195.34.181.49	Find precise map location of 195.34.181.49
88.9.82.226	Find precise map location of 88.9.82.226
220.171.135.224	Find precise map location of 220.171.135.224
254.74.59.34	Find precise map location of 254.74.59.34
159.130.100.5	Find precise map location of 159.130.100.5

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