155.21.21 is a class C of IPs

Sample IPs from the class C 155.21.21

155.21.21.126	View precise location of 155.21.21.126 on the map!
155.21.21.58	View precise location of 155.21.21.58 on the map!
155.21.21.5	View precise location of 155.21.21.5 on the map!
155.21.21.245	View precise location of 155.21.21.245 on the map!
155.21.21.136	View precise location of 155.21.21.136 on the map!
155.21.21.50	View precise location of 155.21.21.50 on the map!
155.21.21.59	View precise location of 155.21.21.59 on the map!
155.21.21.164	View precise location of 155.21.21.164 on the map!
155.21.21.153	View precise location of 155.21.21.153 on the map!
155.21.21.88	View precise location of 155.21.21.88 on the map!
155.21.21.56	View precise location of 155.21.21.56 on the map!

10 Random IPs

177.76.173.213	Find precise map location of 177.76.173.213
57.161.61.65	Find precise map location of 57.161.61.65
34.198.9.197	Find precise map location of 34.198.9.197
95.45.254.186	Find precise map location of 95.45.254.186
134.165.189.30	Find precise map location of 134.165.189.30
218.3.123.140	Find precise map location of 218.3.123.140
59.66.1.198	Find precise map location of 59.66.1.198
177.254.35.193	Find precise map location of 177.254.35.193
35.91.68.124	Find precise map location of 35.91.68.124
19.73.223.92	Find precise map location of 19.73.223.92
87.151.207.84	Find precise map location of 87.151.207.84

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