Robtex

Up: 212.56.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.56.4.0/25
Down right: 212.56.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.56.4.3	PTR	router2.bulins.bg
212.56.4.10	A+PTR	ns.bulins.bg
212.56.4.10	A	ns.bulins.com
212.56.4.11	A+PTR	carhistory.bg
212.56.4.11	A	db.carhistory.bg
212.56.4.11	A	www.carhistory.bg
212.56.4.14	A	mail.carhistory.bg
212.56.4.20	A+PTR	mail.bulins.bg
212.56.4.20	A	mail.bulins.com
212.56.4.56	A	bulins.eu
212.56.4.56	A	bulins.com
212.56.4.56	A	bulins.bg
212.56.4.57	A+PTR	inventory.bulins.bg
212.56.4.111	A	wwwins.bulins.bg