Robtex

Up: 210.157.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.157.31.0/25
Down right: 210.157.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.157.31.5	A+PTR	exp2.yahoowebhosting.jp
210.157.31.6	A+PTR	test-cs-expert2.com
210.157.31.6	A	smtp.test-cs-expert2.com
210.157.31.7	A+PTR	test-sys20-08.com
210.157.31.7	A	smtp.test-sys20-08.com
210.157.31.9	A	jrcss.co.jp
210.157.31.11	A	nts-r.co.jp
210.157.31.12	A	dil-jp.com
210.157.31.12	A	smtp.dil-jp.com
210.157.31.13	A	mgm-market.com
210.157.31.13	A	smtp.mgm-market.com
210.157.31.14	A	smtp.sk1-luckyg.jp
210.157.31.14	A	sk1-luckyg.jp
210.157.31.18	PTR	amomo.jp
210.157.31.18	A	smtp.amomo.jp
210.157.31.19	A+PTR	a2home.net
210.157.31.19	A	*.a2home.net
210.157.31.19	A	smtp.a2home.net
210.157.31.21	PTR	nihonextron.co.jp
210.157.31.22	A+PTR	print-tshirts.com
210.157.31.22	A	www.print-tshirts.com
210.157.31.22	A	smtp.print-tshirts.com
210.157.31.26	PTR	trl-wakayama.co.jp
210.157.31.27	PTR	seicho-inc.jp
210.157.31.29	A+PTR	jax.co.jp
210.157.31.29	A	smtp.jax.co.jp
210.157.31.31	A+PTR	k-keibi.co.jp
210.157.31.31	A	www.k-keibi.co.jp
210.157.31.31	A	smtp.k-keibi.co.jp
210.157.31.35	A+PTR	mano-glass.com
210.157.31.35	A	smtp.mano-glass.com
210.157.31.37	A+PTR	seibi-net.com
210.157.31.37	A	smtp.seibi-net.com
210.157.31.39	PTR	mashimo.co.jp
210.157.31.39	A	smtp.mashimo.co.jp
210.157.31.41	A	smtp.littleagency.jp
210.157.31.43	A+PTR	cash-one.biz
210.157.31.43	A	smtp.cash-one.biz
210.157.31.44	A+PTR	dpc-gr.net
210.157.31.44	A	smtp.dpc-gr.net
210.157.31.44	A	*.dpc-gr.net
210.157.31.53	PTR	fuyinshe.jp
210.157.31.60	PTR	urawa-tax.com
210.157.31.64	A	handp.co.jp
210.157.31.65	A	okano-net.com
210.157.31.65	A	smtp.okano-net.com
210.157.31.68	A+PTR	takanecn.com
210.157.31.68	A	smtp.takanecn.com
210.157.31.72	A+PTR	atlan-co.jp
210.157.31.72	A	smtp.atlan-co.jp
210.157.31.90	PTR	etonya.com
210.157.31.101	A+PTR	okuok.jp
210.157.31.101	A	smtp.okuok.jp
210.157.31.102	A+PTR	havikorotoy.com
210.157.31.102	A	smtp.havikorotoy.com