143.81.3 is a class C of IPs

Sample IPs from the class C 143.81.3

143.81.3.9	View precise location of 143.81.3.9 on the map!
143.81.3.134	View precise location of 143.81.3.134 on the map!
143.81.3.13	View precise location of 143.81.3.13 on the map!
143.81.3.176	View precise location of 143.81.3.176 on the map!
143.81.3.17	View precise location of 143.81.3.17 on the map!
143.81.3.44	View precise location of 143.81.3.44 on the map!
143.81.3.254	View precise location of 143.81.3.254 on the map!
143.81.3.69	View precise location of 143.81.3.69 on the map!
143.81.3.194	View precise location of 143.81.3.194 on the map!
143.81.3.84	View precise location of 143.81.3.84 on the map!
143.81.3.178	View precise location of 143.81.3.178 on the map!

10 Random IPs

13.55.60.192	Find precise map location of 13.55.60.192
1.93.81.107	Find precise map location of 1.93.81.107
206.112.155.113	Find precise map location of 206.112.155.113
95.158.152.212	Find precise map location of 95.158.152.212
124.91.5.86	Find precise map location of 124.91.5.86
168.57.162.30	Find precise map location of 168.57.162.30
160.106.11.164	Find precise map location of 160.106.11.164
14.73.93.54	Find precise map location of 14.73.93.54
182.21.164.202	Find precise map location of 182.21.164.202
21.55.37.230	Find precise map location of 21.55.37.230
208.126.206.65	Find precise map location of 208.126.206.65

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