Robtex

Up: 5.104.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 5.104.80.0/23
Down right: 5.104.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.104.80.1	PTR	gw.descomservice.com
5.104.80.2	A+PTR	host2.descomservice.com
5.104.80.3	A+PTR	host3.descomservice.com
5.104.80.4	A+PTR	host4.descomservice.com
5.104.80.5	A+PTR	host5.descomservice.com
5.104.80.6	A+PTR	host6.descomservice.com
5.104.80.7	A+PTR	host7.descomservice.com
5.104.80.8	A+PTR	sslvpn.descomservice.com
5.104.80.9	A+PTR	host9.descomservice.com
5.104.80.10	A+PTR	host10.descomservice.com
5.104.80.11	A+PTR	rd.descomservice.com
5.104.80.12	A+PTR	ns1.descomservice.com
5.104.80.13	PTR	ns1.descomservice.com
5.104.80.13	A	ns2.descomservice.com
5.104.82.1	PTR	hostc1.descomservice.com
5.104.82.2	PTR	hostc2.descomservice.com
5.104.82.3	PTR	hostc3.descomservice.com
5.104.82.4	PTR	hostc4.descomservice.com
5.104.82.5	PTR	hostc5.descomservice.com
5.104.82.6	PTR	hostc6.descomservice.com
5.104.82.7	PTR	hostc7.descomservice.com
5.104.82.8	PTR	hostc8.descomservice.com
5.104.82.9	PTR	hostc9.descomservice.com
5.104.82.10	PTR	hostc10.descomservice.com
5.104.82.30	A+PTR	www.kotipizza.fi
5.104.82.30	A	online.kotipizza.fi
5.104.82.34	PTR	hostc34.descomservice.com
5.104.82.51	PTR	hostc51.descomservice.com
5.104.82.53	PTR	www.stark-suomi.fi
5.104.82.53	A	www.puukeskus.fi
5.104.82.53	A	starkki.fi
5.104.82.61	A+PTR	m1.descomservice.com
5.104.82.62	A+PTR	m2.descomservice.com
5.104.82.72	A	www.kirja-karkkainen.fi
5.104.82.72	A	suomalainen.com
5.104.82.72	A	kirja-karkkainen.fi
5.104.82.75	PTR	store.craneproparts.com
5.104.82.78	PTR	hostc78.descomservice.com
5.104.82.79	PTR	hostc79.descomservice.com
5.104.82.92	A+PTR	krampdemo.descomservice.com
5.104.82.93	A+PTR	sourceproxy.descomservice.com
5.104.82.94	A+PTR	repository.descomservice.com