Robtex

Up: 173.214.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 173.214.136.0/22
Down right: 173.214.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.214.136.146	PTR	h173-214-136-146.bigpipeinc.com
173.214.136.186	PTR	h173-214-136-186.bigpipeinc.com
173.214.137.185	PTR	h173-214-137-185.bigpipeinc.com
173.214.138.74	PTR	h173-214-138-74.bigpipeinc.com
173.214.138.115	PTR	h173-214-138-115.bigpipeinc.com
173.214.138.203	PTR	h173-214-138-203.bigpipeinc.com
173.214.139.42	PTR	h173-214-139-42.bigpipeinc.com
173.214.140.70	A	ohw.me
173.214.142.2	PTR	h173-214-142-2.bigpipeinc.com
173.214.142.2	A	ns2.ssi-hosting.com
173.214.142.2	A	ns4.f12-hosting.net
173.214.142.3	PTR	h173-214-142-3.bigpipeinc.com
173.214.142.129	PTR	h173-214-142-129.bigpipeinc.com
173.214.142.232	PTR	h173-214-142-232.bigpipeinc.com
173.214.143.94	A	mail.surgicalcentres.com
173.214.143.106	A	mail.skylinegroup.com
173.214.143.122	A	remote.orlenupstream.ca
173.214.143.122	A	mail.orlenupstream.ca
173.214.143.130	A	mustusenergy.com
173.214.143.146	PTR	h173-214-143-146.bigpipeinc.com
173.214.143.170	A+PTR	mail.petrusresources.com
173.214.143.170	A	mail.ravenwoodenergy.com
173.214.143.219	A	mail2.printaudit.com