Robtex

Up: 219.242.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 219.242.48.0/21
Down right: 219.242.56.0/21

IP	Type	Hostname
219.242.50.1	A+PTR	dns1.bicea.edu.cn
219.242.50.1	A+PTR	dns1.bucea.edu.cn
219.242.50.1	PTR	dns1.mails.bucea.edu.cn
219.242.50.5	A+PTR	bicea.edu.cn
219.242.50.5	A+PTR	bucea.edu.cn
219.242.50.5	PTR	www.bicea.edu.cn
219.242.51.1	A+PTR	dns2.bicea.edu.cn
219.242.51.1	A+PTR	dns2.bucea.edu.cn
219.242.51.1	PTR	dns2.mails.bucea.edu.cn