Robtex

Up: 31.209.160.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 31.209.160.0/21
Down right: 31.209.168.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.209.160.0	PTR	cust-0-160-209-31.ip-customer.net
31.209.160.100	A+PTR	nsa.swtbg.net
31.209.160.101	A	mail.swtbg.net
31.209.160.102	A+PTR	smtpa.swtbg.net
31.209.160.102	A	smtpa.stwtbg.net
31.209.160.103	PTR	portal.swtbg.net
31.209.161.4	A	mx.stadtwerke-trostberg.de
31.209.161.4	A	smtpout.stadtwerke-trostberg.de
31.209.161.34	A	tbg.mode-heppel.de
31.209.161.36	A	gw.rades-net.de
31.209.161.36	A	mail.rades-net.de
31.209.161.45	A+PTR	stadtwerke.webflow.de
31.209.161.60	A+PTR	cust-31-209-161-60.ip-customer.net
31.209.161.130	A+PTR	smtp.chiemgauer-naturfleisch.de
31.209.161.130	A	smtp.c-nf.de
31.209.161.165	A+PTR	cust-31-209-161-165.ip-customer.net
31.209.163.44	A+PTR	cust-44-163-209-31.ip-customer.net
31.209.165.44	A+PTR	cust-44-165-209-31.ip-customer.net
31.209.165.144	A+PTR	cust-144-165-209-31.ip-customer.net
31.209.165.231	A	befficient.me
31.209.169.45	A+PTR	cust-45-169-209-31.ip-customer.net
31.209.171.189	A+PTR	cust-189-171-209-31.ip-customer.net
31.209.173.5	A+PTR	cust-5-173-209-31.ip-customer.net
31.209.175.82	A+PTR	sv82.regnauerfb.net
31.209.175.164	A+PTR	mx.bauer-gruppe.de
31.209.175.186	A+PTR	mail.riedl.com
31.209.175.186	A	riedl.com
31.209.175.194	A+PTR	cust-194-175-209-31.ip-customer.net
31.209.175.194	A	webmail.zosseder.de
31.209.175.210	PTR	mail.alpenhain.de
31.209.175.210	A	mail.xn--bayerischer-landkse-wwb.de
31.209.175.210	A	mail.alpenhain.net
31.209.175.211	PTR	cust-211-175-209-31.ip-customer.net
31.209.175.227	A+PTR	cust-227-175-209-31.ip-customer.net
31.209.175.227	A	zelger.tv