Robtex

Up: 212.166.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.166.21.0/25
Down right: 212.166.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.166.21.7	PTR	eup-07.hexpol.com
212.166.21.7	A	212-166-21-7.win.be
212.166.21.18	PTR	eup-18.hexpol.com
212.166.21.18	A	212-166-21-18.win.be
212.166.21.34	A+PTR	212-166-21-34.win.be
212.166.21.34	A	webmail.people-tech.com
212.166.21.34	A	mail.people-tech.com
212.166.21.36	A	212-166-21-36.win.be
212.166.21.36	A	cloudbelgium.be
212.166.21.41	A+PTR	212-166-21-41.win.be
212.166.21.43	A	212-166-21-43.win.be
212.166.21.44	A	212-166-21-44.win.be
212.166.21.52	A	ubimo.be
212.166.21.68	PTR	mail.webplanet.be
212.166.21.68	A	mail.mysecureit.be
212.166.21.68	A	mail.vincennes.be
212.166.21.69	PTR	212-166-21-69.win.be
212.166.21.69	A	www.laperlerare.be
212.166.21.69	A	www.ecoleartemis.be
212.166.21.75	A	mail2.monde-selection.asia
212.166.21.75	A	mail.monde-selection.com
212.166.21.76	A+PTR	212-166-21-76.win.be
212.166.21.76	A	malodau.fr
212.166.21.76	A	mal-au-dos.be
212.166.21.80	PTR	212-166-21-80.win.be
212.166.21.80	A	sundayopen.com
212.166.21.80	A	atwo.net
212.166.21.81	PTR	mail.atwo.net
212.166.21.81	A	mail2.atwo.net
212.166.21.81	A	pop.clubquadrifoglio.be
212.166.21.82	A+PTR	212-166-21-82.win.be
212.166.21.82	A	unitseven.eu
212.166.21.82	A	claudewesel.eu
212.166.21.83	A	hwktc.com
212.166.21.83	A	earthmandoublewood.com
212.166.21.83	A	madejmusic.com
212.166.21.135	A	mail.molis.be
212.166.21.138	A+PTR	212-166-21-138.win.be
212.166.21.138	A	www.molis.be
212.166.21.182	A	atomik.com
212.166.21.182	A	www.atomik.be
212.166.21.182	A	atomik.be
212.166.21.189	A+PTR	212-166-21-189.win.be
212.166.21.189	A	jira.produweb-gaming.com
212.166.21.190	A+PTR	212-166-21-190.win.be
212.166.21.190	A	atomik.com
212.166.21.210	A+PTR	212-166-21-210.win.be
212.166.21.210	A	office.damnet.be
212.166.21.211	A	212-166-21-211.win.be
212.166.21.212	A	212-166-21-212.win.be
212.166.21.213	A	212-166-21-213.win.be
212.166.21.225	PTR	212-166-21-225.win.be
212.166.21.226	A	212-166-21-226.win.be
212.166.21.229	PTR	mx.theatredeliege.be
212.166.21.229	A	mail.theatredelaplace.eu
212.166.21.229	A	mx.theatredelaplace.com
212.166.21.234	A	mail.carrieresduhainaut.com
212.166.21.234	A	mx1.carrieresduhainaut.com
212.166.21.254	A+PTR	intranet.azurenardenne.be