Robtex

Up: 209.8.76.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 209.8.76.0/25
Down right: 209.8.76.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.8.76.1	PTR	core1-gw.ashburn-va.bitshop.com
209.8.76.3	PTR	customer.bitshop.com
209.8.76.5	PTR	customer.bitshop.com
209.8.76.9	PTR	customer.bitshop.com
209.8.76.10	PTR	customer.bitshop.com
209.8.76.22	PTR	customer.bitshop.com
209.8.76.22	A	nonn.de
209.8.76.36	PTR	customer.bitshop.com
209.8.76.50	PTR	customer.bitshop.com
209.8.76.86	PTR	customer.bitshop.com
209.8.76.98	A	rt.bitshop.com
209.8.76.102	PTR	customer.bitshop.com
209.8.76.109	PTR	customer.bitshop.com
209.8.76.111	PTR	customer.bitshop.com
209.8.76.119	PTR	customer.bitshop.com
209.8.76.123	PTR	customer.bitshop.com
209.8.76.154	PTR	customer.bitshop.com
209.8.76.185	PTR	customer.bitshop.com
209.8.76.188	PTR	customer.bitshop.com
209.8.76.198	PTR	customer.bitshop.com
209.8.76.199	PTR	customer.bitshop.com
209.8.76.202	PTR	customer.bitshop.com
209.8.76.203	A+PTR	exchange.bitshop.com
209.8.76.203	A	exchange2003.bitshop.com
209.8.76.208	PTR	customer.bitshop.com
209.8.76.223	PTR	customer.bitshop.com
209.8.76.224	A+PTR	smtp3.bitshop.com
209.8.76.224	A	etrn.bitshop.com
209.8.76.224	A	mail.bitshop.com
209.8.76.225	A+PTR	smtpout.bitshop.com
209.8.76.226	PTR	smtp2.bitshop.com
209.8.76.228	PTR	customer.bitshop.com
209.8.76.229	PTR	customer.bitshop.com
209.8.76.229	A	feedme.ineedspam.com
209.8.76.235	PTR	customer.bitshop.com
209.8.76.246	PTR	customer.bitshop.com