Robtex

Up: 156.154.100.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 156.154.100.0/25
Down right: 156.154.100.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
156.154.100.1	A+PTR	a.gtld.travel
156.154.100.3	PTR	nsa.nic.uk
156.154.100.3	A	dnsa.nic.beer
156.154.100.3	A	dnsa.nic.yamaxun
156.154.100.4	A+PTR	k.ca-servers.ca
156.154.100.5	A+PTR	c.dns.jp
156.154.100.7	PTR	u.nic.eu
156.154.100.8	A	udns1.salesforce.com
156.154.100.11	A+PTR	a.dns.lu
156.154.100.12	A+PTR	not.norid.no
156.154.100.13	PTR	ns0.nus.nic.nu
156.154.100.14	PTR	ns5.dns.net.nz
156.154.100.15	A+PTR	i-dns.pl
156.154.100.17	PTR	ns0.nic.tt
156.154.100.18	PTR	udns1.ausregistry.net.au
156.154.100.19	PTR	d.gtld.biz
156.154.100.20	A	ns5.registry.in
156.154.100.22	A	ns1.registry-servers.4u.com
156.154.100.23	A+PTR	ns1.isc.ultradns.net
156.154.100.25	A+PTR	ns1.cctld.co
156.154.100.26	PTR	c.fi
156.154.100.27	A	a.nic.bank
156.154.100.28	PTR	a.dns-server.iq
156.154.100.30	A+PTR	state01.ultradns.net
156.154.100.224	A+PTR	rdsdns1.ultradns.net