Robtex

Up: 192.0.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 192.0.96.0/20
Down right: 192.0.112.0/20

IP	Type	Hostname
192.0.96.41	A+PTR	smtp2.dca.wordpress.com
192.0.96.123	A	smtp3.dca.wordpress.com
192.0.96.184	A	dca-files.vipv2.net
192.0.96.185	A	dca-files.vipv2.net
192.0.96.236	A+PTR	smtp3-1.dca.wordpress.com
192.0.96.237	A+PTR	smtp3-2.dca.wordpress.com
192.0.96.239	A+PTR	smtp2-2.dca.wordpress.com
192.0.96.246	A	api.woocommerce.com
192.0.97.107	A+PTR	smtp-backup.dca.wordpress.com
192.0.97.133	A+PTR	smtp1-fwd.dca.wordpress.com
192.0.97.133	A	smtp-fwd.wordpress.com
192.0.97.161	A	smtp1.dca.wordpress.com
192.0.97.214	A	dca.wordpress.com
192.0.97.214	A	iad.wordpress.com
192.0.97.215	A	dca.wordpress.com
192.0.97.215	A	iad.wordpress.com
192.0.97.232	A	nicksandbox.wordpress.com
192.0.97.232	A	nicksandbox.com
192.0.97.249	A	smtp-backup-out1.dca.wordpress.com
192.0.97.251	A+PTR	smtp1-1.dca.wordpress.com
192.0.98.29	A	noc1.dca.wordpress.com
192.0.98.54	A	service.afterthedeadline.com
192.0.98.54	A	en.service.afterthedeadline.com
192.0.98.77	A	vip-mem-312-21.dca.vipv2.net
192.0.98.78	A	vip-mem-302-29.dca.vipv2.net
192.0.98.83	A	vip-mem-203-24.dca.vipv2.net
192.0.98.84	A	vip-mem-301-24.dca.vipv2.net
192.0.98.247	A+PTR	proxy.automattic.com
192.0.98.251	A	dca.wordpress.com
192.0.98.251	A	iad.wordpress.com
192.0.98.252	A	dca.wordpress.com
192.0.98.252	A	iad.wordpress.com
192.0.99.7	PTR	wordpress.com
192.0.99.42	PTR	wordpress.com
192.0.99.59	PTR	wordpress.com
192.0.99.66	PTR	wordpress.com
192.0.99.74	PTR	wordpress.com
192.0.99.74	A	logstash3.dca.wordpress.com
192.0.99.83	PTR	wordpress.com
192.0.99.131	PTR	wordpress.com
192.0.99.138	PTR	wordpress.com
192.0.99.146	PTR	wordpress.com
192.0.99.163	A+PTR	jobs3.misc.dca.vaultpress.com
192.0.99.164	PTR	wordpress.com
192.0.99.194	PTR	wordpress.com
192.0.99.220	A	jobs4.comm.dca.vaultpress.com
192.0.99.235	A+PTR	jobs4.misc.dca.vaultpress.com
192.0.100.26	A	logstash1.dca.wordpress.com
192.0.100.122	A	logstash4.dca.wordpress.com
192.0.101.0	PTR	wordpress.com
192.0.101.2	PTR	wordpress.com
192.0.101.32	PTR	wordpress.com
192.0.101.34	PTR	wordpress.com
192.0.101.35	PTR	wordpress.com
192.0.101.43	A	jobs9.misc.dca.vaultpress.com
192.0.101.65	PTR	wordpress.com
192.0.101.66	PTR	wordpress.com
192.0.101.74	A	logstash2.dca.wordpress.com
192.0.101.98	PTR	wordpress.com
192.0.101.99	A+PTR	jobs20.data.dca.vaultpress.com
192.0.101.152	A	smtp4.dca.wordpress.com
192.0.101.163	PTR	wordpress.com
192.0.101.172	A	jobs13.misc.dca.vaultpress.com
192.0.101.193	PTR	wordpress.com
192.0.101.195	PTR	wordpress.com
192.0.101.226	PTR	wordpress.com
192.0.101.248	A	logstash5.dca.wordpress.com
192.0.110.164	A	mail.billhighway.info
192.0.114.143	A	vip-mem-209-34.bur.vipv2.net
192.0.114.143	A	vip-mem-209-32.bur.vipv2.net
192.0.115.113	PTR	113-115-0-192.1912.me
192.0.115.113	A	mx1.bur.wordpress.com
192.0.115.164	A	vip-mem-205-47.bur.vipv2.net
192.0.117.15	A	vip-mem-206-34.bur.vipv2.net
192.0.117.118	A+PTR	smtp3.bur.wordpress.com
192.0.117.210	A	noc1.bur.wordpress.com
192.0.118.217	A+PTR	smtp4.bur.wordpress.com
192.0.119.4	A	vip-mem-210-47.bur.vipv2.net
192.0.123.32	A	smtp1-1.bur.wordpress.com
192.0.123.33	A+PTR	smtp1-2.bur.wordpress.com
192.0.123.34	A+PTR	smtp1-3.bur.wordpress.com
192.0.123.36	A+PTR	smtp2-1.bur.wordpress.com
192.0.123.238	A	cloudup.com
192.0.123.239	A	cloudup.com
192.0.123.242	A	bur-files.vipv2.net
192.0.123.243	A	bur-files.vipv2.net
192.0.123.244	A	cloudup.com
192.0.123.245	A	cloudup.com
192.0.123.246	A	intensedebate.com
192.0.123.247	A	intensedebate.com
192.0.123.248	A	poll.fm
192.0.123.249	A	poll.fm
192.0.124.251	PTR	proxy.automattic.com