Robtex

Up: 63.172.86.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 63.172.87.0/25
Down right: 63.172.87.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
63.172.87.2	A+PTR	fw2.holnam.com
63.172.87.10	A+PTR	ns1.holnam.com
63.172.87.12	A+PTR	ns0.holnam.com
63.172.87.26	A+PTR	mail.holnam.com
63.172.87.26	PTR	usa-mail01.na.holcim.net
63.172.87.26	A	mail.holcem.com
63.172.87.30	A+PTR	ilogin.holnam.com
63.172.87.30	PTR	pordbp1.holnam.com
63.172.87.30	A+PTR	sapbwapp1.holnam.com
63.172.87.48	A+PTR	iwork.nasc.biz
63.172.87.49	A	2work.nasc.biz
63.172.87.59	A	dufferin-concrete.com
63.172.87.70	A+PTR	www.clic-demix.com
63.172.87.70	A	clic-demix.com
63.172.87.73	A+PTR	mail-usca.holnam.com
63.172.87.74	A+PTR	mail-usca.holnam.com
63.172.87.75	PTR	www.dufferin-rockstar.ca
63.172.87.75	PTR	www.darockstar.com
63.172.87.75	A+PTR	www.dufferin-rockstar.com
63.172.87.76	A+PTR	vpn.nasc.biz
63.172.87.131	A	cement.holcim.us
63.172.87.139	PTR	sc.nasc.biz
63.172.87.149	A	sfc.holcim-na.com
63.172.87.232	A+PTR	wss.holcim-na.com
63.172.87.233	PTR	wsd.holcim-na.com
63.172.87.236	A	wsp.holcim-na.com
63.172.87.237	A+PTR	wsx.holcim-na.com
63.172.87.238	A+PTR	sfct.holcim-na.com
63.172.87.239	A	dufferin-utrack.ca