Robtex

Up: 217.67.160.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 217.67.164.0/23
Down right: 217.67.166.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.67.164.133	A+PTR	mail.she2-138.ds.travelsleuth.com
217.67.164.135	A+PTR	mail.she2-140.ds.travelsleuth.com
217.67.164.136	A+PTR	mail.she2-141.ds.travelsleuth.com
217.67.164.138	A+PTR	mail.she2-143.ds.travelsleuth.com
217.67.164.144	A+PTR	mail.s0821-149.news.newmondo-discount.com
217.67.164.170	A+PTR	mail.s0821-175.news.piovonofferte.net
217.67.164.219	A+PTR	mail.s0821-224.news.emailsupreme.net
217.67.165.4	PTR	mail.fox3-9.ds.legwayx.com
217.67.165.4	A	mail.ds.noldr.com
217.67.165.4	A	mail.ds.yoldr.com
217.67.165.5	A	ds.legwayx.com
217.67.165.189	A+PTR	mail.fox3-194.ds.promoimpro.com
217.67.165.190	A+PTR	mail.fox3-195.ds.promoimpro.com
217.67.165.191	A+PTR	mail.fox3-196.ds.promoimpro.com
217.67.166.4	PTR	mail.mk2-9.ds.diversasoportunidades.com
217.67.166.4	A	mail.ds.enjoyyouroffers.com
217.67.166.4	A	mail.ds.enjoyyouroffer.com
217.67.166.5	A	ds.enjoyyouroffer.com
217.67.167.156	A+PTR	mail.worm3-161.ds.bigupforbruker.com