Robtex

Up: 5.10.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 5.10.240.0/22
Down right: 5.10.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.10.240.19	PTR	vlan240-19.azeronline.com
5.10.240.213	A	mx02.lapopistelli.it
5.10.240.213	A	mx02.klogistic.com
5.10.240.213	A	mx02.first-line.it
5.10.241.40	A+PTR	vlan241-40.azeronline.com
5.10.241.139	A	vlan241-139.azeronline.com
5.10.241.200	A+PTR	vlan241-200.azeronline.com
5.10.241.208	A+PTR	vlan241-208.azeronline.com
5.10.242.74	A+PTR	vlan242-74.azeronline.com
5.10.242.146	A+PTR	vlan242-146.azeronline.com
5.10.244.127	A	vlan244-127.azeronline.com
5.10.244.170	A	vlan244-170.azeronline.com
5.10.244.240	A+PTR	vlan244-240.azeronline.com
5.10.245.3	PTR	vlan245-3.azeronline.com
5.10.245.131	A	vlan245-131.azeronline.com
5.10.245.139	A+PTR	vlan245-139.azeronline.com
5.10.245.173	A	vlan245-173.azeronline.com
5.10.246.2	A+PTR	vlan246-2.azeronline.com
5.10.246.55	A	vlan246-55.azeronline.com
5.10.246.56	A+PTR	vlan246-56.azeronline.com
5.10.246.67	A+PTR	vlan246-67.azeronline.com
5.10.246.76	A	vlan246-76.azeronline.com
5.10.246.98	A+PTR	vlan246-98.azeronline.com
5.10.246.99	A+PTR	vlan246-99.azeronline.com
5.10.246.110	A	vlan246-110.azeronline.com
5.10.246.112	A+PTR	vlan246-112.azeronline.com
5.10.246.141	A	vlan246-141.azeronline.com
5.10.246.146	A+PTR	vlan246-146.azeronline.com
5.10.246.147	A+PTR	vlan246-147.azeronline.com
5.10.246.153	A+PTR	vlan246-153.azeronline.com
5.10.246.179	A+PTR	vlan246-179.azeronline.com
5.10.246.197	A	vlan246-197.azeronline.com
5.10.246.222	A	vlan246-222.azeronline.com
5.10.246.229	A	vlan246-229.azeronline.com
5.10.247.1	A+PTR	vlan247-1.azeronline.com
5.10.247.44	A	vlan247-44.azeronline.com
5.10.247.149	A	vlan247-149.azeronline.com
5.10.247.171	A+PTR	vlan247-171.azeronline.com