Robtex

Up: 8.20.242.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 8.20.243.0/25
Down right: 8.20.243.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
8.20.243.1	PTR	ns2.nudns.com
8.20.243.1	A	ns2.developersquad.net
8.20.243.1	A	ns2.leftofthedot.com
8.20.243.2	PTR	ns4.nudns.com
8.20.243.2	A	ns4.leftofthedot.com
8.20.243.2	A	securedns4.webhosting4u.gr
8.20.243.3	PTR	ns2.dnsbycomodo.net
8.20.243.4	PTR	ns8.dns.com
8.20.243.5	A+PTR	ns2.elv8.net
8.20.243.6	A+PTR	ns4.elv8.net
8.20.243.16	PTR	ns6.101domain.com
8.20.243.16	A	ns7.101domain.com
8.20.243.17	PTR	ns8.101domain.com
8.20.243.17	A	ns9.101domain.com
8.20.243.24	PTR	ns2.101domain.com
8.20.243.24	A	dns2.brandshelter.de
8.20.243.26	PTR	msns2.vilayer.com
8.20.243.30	PTR	ns2.leftofthedot.com
8.20.243.31	PTR	ns4.leftofthedot.com
8.20.243.35	PTR	ns2.dgtldns.com
8.20.243.36	PTR	ns4.dgtldns.com
8.20.243.50	PTR	ns2.ssl-processing.com
8.20.243.51	PTR	ns4.ssl-processing.com
8.20.243.57	PTR	ns2.istreamlive.com
8.20.243.58	PTR	ns4.istreamlive.com
8.20.243.61	A+PTR	ns2.4thenet.net
8.20.243.62	A+PTR	ns4.4thenet.net
8.20.243.65	A+PTR	ns2.londondrugs.com
8.20.243.68	PTR	ns4.dns-anycast.net
8.20.243.69	A+PTR	ns2.dns.com.sv
8.20.243.69	A	ns2.dns.gob.sv
8.20.243.69	A	dns2.wevdns.com
8.20.243.70	A+PTR	ns4.dns.com.sv
8.20.243.70	A	dns4.wevdns.net
8.20.243.70	A	dns4.wevdns.com
8.20.243.71	A	ns200.adwebtech.com
8.20.243.72	A	ns400.adwebtech.com
8.20.243.73	PTR	ns2.perfectaddress.com
8.20.243.74	PTR	ns4.perfectaddress.com
8.20.243.80	PTR	ns4.crain.com
8.20.243.81	PTR	ns2.dnsstation.com
8.20.243.83	PTR	ns2.domain.jobs
8.20.243.84	PTR	ns4.domain.jobs
8.20.243.85	PTR	ns2.retailup.com
8.20.243.86	PTR	ns4.retailup.com
8.20.243.91	PTR	ns2.flamingdns.co.uk
8.20.243.91	A	ns2.bankads.com
8.20.243.92	PTR	ns4.flamingdns.co.uk
8.20.243.92	A	ns4.bankads.com
8.20.243.95	A	ns2.edcogroup.net
8.20.243.99	A+PTR	ns2.subhostingdns.com
8.20.243.100	A+PTR	ns4.subhostingdns.com
8.20.243.105	A+PTR	premium-ns2.dnsowl.com
8.20.243.106	A	ns-b.eurodns.org
8.20.243.107	A+PTR	ns2.eurodns.com
8.20.243.108	A+PTR	ns4.eurodns.com
8.20.243.113	A	ns2.prodns.net
8.20.243.180	A	nss1.nudns.com
8.20.243.190	A	nss2.nudns.com