181.1.21 is a class C of IPs

Sample IPs from the class C 181.1.21

181.1.21.92	View precise location of 181.1.21.92 on the map!
181.1.21.223	View precise location of 181.1.21.223 on the map!
181.1.21.122	View precise location of 181.1.21.122 on the map!
181.1.21.146	View precise location of 181.1.21.146 on the map!
181.1.21.216	View precise location of 181.1.21.216 on the map!
181.1.21.251	View precise location of 181.1.21.251 on the map!
181.1.21.203	View precise location of 181.1.21.203 on the map!
181.1.21.15	View precise location of 181.1.21.15 on the map!
181.1.21.35	View precise location of 181.1.21.35 on the map!
181.1.21.34	View precise location of 181.1.21.34 on the map!
181.1.21.8	View precise location of 181.1.21.8 on the map!

10 Random IPs

61.135.126.79	Find precise map location of 61.135.126.79
152.207.251.101	Find precise map location of 152.207.251.101
158.137.97.148	Find precise map location of 158.137.97.148
94.140.186.12	Find precise map location of 94.140.186.12
225.56.29.20	Find precise map location of 225.56.29.20
41.84.35.174	Find precise map location of 41.84.35.174
172.237.142.50	Find precise map location of 172.237.142.50
204.92.192.32	Find precise map location of 204.92.192.32
80.18.217.33	Find precise map location of 80.18.217.33
131.49.102.158	Find precise map location of 131.49.102.158
11.121.158.206	Find precise map location of 11.121.158.206

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