Robtex

Up: 209.104.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 209.104.44.0/23
Down right: 209.104.46.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.104.44.15	A	ticketron.com
209.104.45.8	A	phx2mta.ticketmaster.com
209.104.45.20	A	tmvista.org
209.104.45.20	A	tmvista.net
209.104.45.21	A+PTR	phx2pxy.ticketmaster.com
209.104.45.21	A	www.ticketmaster1st.akadns.net
209.104.45.24	A	phx2mda.ticketmaster.com
209.104.45.25	A+PTR	phx2pxy.ticketmaster.ca
209.104.45.25	A	canada.ticketmaster1st.akadns.net
209.104.45.26	PTR	phx2ws.ticketmaster.com
209.104.45.26	A	ws.ticketmaster.com
209.104.45.27	PTR	phx2mx.ticketmaster.com
209.104.45.27	PTR	phx2pxy.ticketmaster.com.mx
209.104.45.28	A+PTR	phx2pxy.ticketmaster.com.au
209.104.45.28	A	australia.ticketmaster1st.akadns.net
209.104.45.29	A+PTR	phx2pxy.ticketmaster.co.nz
209.104.45.29	A	newzealand.ticketmaster1st.akadns.net
209.104.45.30	PTR	phx2reg.ticketmaster.com
209.104.45.32	PTR	phx2rdr.ticketmaster.com
209.104.45.32	A	journalpavilion.com
209.104.45.32	A	coralskyamp.com
209.104.45.35	PTR	phx2ln.ticketmaster.com
209.104.45.36	A+PTR	phx2api.ticketmaster.com
209.104.45.48	A+PTR	ld01-gateway.ticketmaster.com
209.104.45.50	A	shop.ticketstoday.com
209.104.45.51	A	admin.ticketstoday.com
209.104.45.76	A	phx2portal.ticketmaster.com
209.104.45.85	A	update.ticketmaster.com
209.104.45.91	A+PTR	alr.ticketmaster.com
209.104.45.92	A+PTR	ns1.ticketmaster.com
209.104.45.110	A+PTR	notifymta.phx1.ticketmaster.com
209.104.45.113	A+PTR	jphx1tma.ticketmaster.com
209.104.45.113	A	ticketmaster1.com
209.104.45.113	A	tmvwww01b.tmvista.com
209.104.45.121	A	tmvwww01a.tmvista.com
209.104.45.122	A	tmvwww02a.tmvista.com
209.104.45.123	A	tmvwww03a.tmvista.com
209.104.45.125	A	tmvsql01.tmvista.com
209.104.45.126	A	tmvsql02.tmvista.com
209.104.45.128	A+PTR	arcrdgwdr.ticketmaster.com
209.104.45.129	A	arcwest.hosted.ticketmaster.com
209.104.45.158	A	my.tmvista.com
209.104.45.249	PTR	de-vip.ads2.ticketmaster.com
209.104.45.249	A	de.ticketmaster1st.akadns.net
209.104.45.249	A	de.ticketmaster.com
209.104.47.15	A+PTR	iac-cft1.ticketmaster.com
209.104.47.16	A+PTR	ticker-cft1.ticketmaster.com
209.104.47.16	A	ipxyreports-cft1.ticketmaster.com
209.104.47.66	A+PTR	mfapi-cft1.ticketmaster.com