181.158.31 is a class C of IPs

Sample IPs from the class C 181.158.31

181.158.31.23	View precise location of 181.158.31.23 on the map!
181.158.31.212	View precise location of 181.158.31.212 on the map!
181.158.31.85	View precise location of 181.158.31.85 on the map!
181.158.31.62	View precise location of 181.158.31.62 on the map!
181.158.31.252	View precise location of 181.158.31.252 on the map!
181.158.31.41	View precise location of 181.158.31.41 on the map!
181.158.31.123	View precise location of 181.158.31.123 on the map!
181.158.31.89	View precise location of 181.158.31.89 on the map!
181.158.31.242	View precise location of 181.158.31.242 on the map!
181.158.31.105	View precise location of 181.158.31.105 on the map!
181.158.31.169	View precise location of 181.158.31.169 on the map!

10 Random IPs

144.251.237.129	Find precise map location of 144.251.237.129
138.124.24.156	Find precise map location of 138.124.24.156
50.41.227.166	Find precise map location of 50.41.227.166
159.56.226.88	Find precise map location of 159.56.226.88
156.49.176.162	Find precise map location of 156.49.176.162
33.180.90.54	Find precise map location of 33.180.90.54
168.72.186.144	Find precise map location of 168.72.186.144
155.236.131.155	Find precise map location of 155.236.131.155
111.9.70.71	Find precise map location of 111.9.70.71
197.49.93.29	Find precise map location of 197.49.93.29
227.178.112.80	Find precise map location of 227.178.112.80

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