Robtex

Up: 185.221.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 185.221.24.0/22
Down right: 185.221.28.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.221.24.16	PTR	mail.pny4-21.mail.vg-vict.com
185.221.24.55	PTR	mail.pny4-60.mail.medium-miranda-nld.com
185.221.24.134	PTR	mail.pny4-139.foru.compraschulas.es
185.221.24.143	PTR	mail.pny4-148.foru.compraschulas.es
185.221.24.149	PTR	mail.pny4-154.mail.vg-laluce.com
185.221.24.168	PTR	mail.pny4-173.news.sponsormail.it
185.221.24.172	PTR	mail.pny4-177.news.sponsormail.it
185.221.25.9	A+PTR	mail.pny5-14.ds.superofertapara.es
185.221.25.36	PTR	mail.pny5-41.newsletter.price-plus.com
185.221.25.46	PTR	mail.pny5-51.newsletter.price-plus.com
185.221.25.47	PTR	mail.pny5-52.e.senderoffer.com
185.221.25.59	PTR	mail.pny5-64.newsletter.price-plus.com
185.221.25.110	PTR	mail.pny5-115.mail.vg-mir.com
185.221.25.125	PTR	mail.pny5-130.emailing.bonoweb.es
185.221.25.135	PTR	mail.pny5-140.emailing.bonoweb.es
185.221.25.146	PTR	mail.pny5-151.emailing.bonoweb.es
185.221.25.150	PTR	mail.pny5-155.news.techjour.fr
185.221.25.202	PTR	mail.pny5-207.newsletter.supergeschenk.com
185.221.25.249	PTR	mail.pny5-254.ds.maildrecom1.com
185.221.26.199	PTR	mail.pny6-204.mail.medium-esther.com
185.221.26.201	PTR	mail.pny6-206.news.buzz-vid.fr
185.221.26.225	PTR	mail.pny6-230.news.lunaofertas.com
185.221.26.242	PTR	mail.pny6-247.news.lunaofertas.com
185.221.27.59	A+PTR	mail.pny7-64.news.geweldigegelegenheden.be
185.221.27.59	A	mail.pny7-64.news.advicebunny.com
185.221.27.70	PTR	mail.pny7-75.ds.xtraffic.biz
185.221.27.84	PTR	mail.pny7-89.e.senderoffer.com
185.221.27.143	PTR	mail.pny7-148.news.win1deal.it
185.221.27.174	PTR	mail.pny7-179.ds.chollosdiarios8.es
185.221.30.2	A	mail1.vest.net
185.221.30.6	PTR	unixweb.vest.net
185.221.30.6	A	www.beck.nyka.dk
185.221.30.10	A+PTR	ns.vest.net
185.221.30.11	A	sms.vest.net
185.221.30.15	A	zite3.vest.net
185.221.30.23	PTR	vinii.vest.net
185.221.30.23	A	vinii.dk
185.221.30.30	PTR	mail.mx30.dk
185.221.30.30	A	www.mx30.dk
185.221.30.33	A	diakonissen.vest.net
185.221.30.34	A	astaroscan2.vest.net
185.221.30.36	A	backup.vest.net
185.221.30.40	PTR	linuxweb.vest.net
185.221.30.40	A	kroner-broer.dk
185.221.30.40	A	all4golfers.dk
185.221.30.41	PTR	opencms.vest.net
185.221.30.42	PTR	ip185221030042.vest.net
185.221.30.66	A	zite3-web1.vest.net
185.221.30.69	A	zite3-web4.vest.net
185.221.30.70	PTR	zite3-web5.vest.net
185.221.30.70	A	www.dedicatedpeople.dk
185.221.30.70	A	reghol.dk
185.221.30.99	PTR	ip185221030099.vest.net
185.221.30.99	A	sprogene.dk
185.221.30.99	A	xn--sprogbger-q8a.dk
185.221.30.157	PTR	togilx07.togidata.dk
185.221.30.157	A	hair-skin.dk
185.221.30.168	PTR	ip185221030168.vest.net
185.221.30.168	A	www.fitplatform.dk