Robtex

Up: 5.57.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 5.57.16.0/25
Down right: 5.57.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.57.16.11	A	operations.booking.com
5.57.16.14	A	account.c.booking.com
5.57.16.19	A	o1.booking.com
5.57.16.20	A	office.booking.com
5.57.16.21	PTR	outlook.booking.com
5.57.16.23	A	excas-eur.booking.com
5.57.16.26	A+PTR	ka-ppc.booking.com
5.57.16.27	PTR	ka-ppcapp.booking.com
5.57.16.29	PTR	paste.booking.com
5.57.16.31	PTR	jira.booking.com
5.57.16.41	A	cs.booking.com
5.57.16.51	PTR	admin.booking.com
5.57.16.51	A	admin.c.booking.com
5.57.16.52	A+PTR	livelog.booking.com
5.57.16.53	A	spadmin.c.booking.com
5.57.16.54	A+PTR	u.booking.com
5.57.16.62	A+PTR	chat.booking.com
5.57.16.62	A	chat.c.booking.com
5.57.16.72	A	blog.booking.com
5.57.16.90	A+PTR	bstatic.com
5.57.16.90	A	apps.bstatic.com
5.57.16.90	A	w.bstatic.com
5.57.16.92	A	j1.booking.com
5.57.16.93	A	supplier.booking.com
5.57.16.96	A+PTR	iphone-xml-l.booking.com
5.57.16.96	A	iphone-xml.c.booking.com
5.57.16.96	A	attractions-xml.c.booking.com
5.57.16.99	PTR	q.bstatic.com
5.57.16.99	A	28fee61e0db011e7a34770fdce19ae27.wildcard.bstatic.com
5.57.16.99	A	1144ad400de911e79c6f70fdce19ae27.wildcard.bstatic.com
5.57.16.100	A+PTR	r.bstatic.com
5.57.16.100	A	r-dc.bstatic.com
5.57.16.100	A	r-dc.lb.bstatic.com
5.57.16.101	A+PTR	s.bstatic.com
5.57.16.101	A	s.lb.bstatic.com
5.57.16.102	PTR	www-dlb.booking.com
5.57.16.108	A	pulse-api.c.booking.com
5.57.16.108	A	pulse.api.booking.com
5.57.16.112	A+PTR	g.bstatic.com
5.57.16.113	A	h.bstatic.com
5.57.16.114	A+PTR	i.bstatic.com
5.57.16.119	PTR	w3.booking.com
5.57.16.120	PTR	w4.booking.com
5.57.16.121	A	affiliates-hub.booking.com
5.57.16.121	A	sites.booking.com
5.57.16.121	A	www.nic.booking
5.57.16.124	A	ux1.booking.com
5.57.16.143	A	bookit.booking.com
5.57.16.143	A	bookingbutton.booking.com
5.57.16.144	A	a1.booking.com
5.57.16.145	A+PTR	ugcupload.booking.com
5.57.16.146	A+PTR	feeds.booking.com
5.57.16.149	A+PTR	static.booking.com
5.57.16.149	A	download.booking.com
5.57.16.150	A	developers.c.booking.com
5.57.16.158	A	connect.booking.com
5.57.16.159	A	bplatweb.c.booking.com
5.57.16.202	A+PTR	derp.booking.com
5.57.16.205	A	barcelo.jp
5.57.16.205	A	barcelo.partners.booking.expert
5.57.16.205	A	vivanta.partner.booking.com
5.57.16.207	A+PTR	booking-ads.com
5.57.16.209	PTR	join.booking.com
5.57.16.209	A	join.c.booking.com
5.57.16.211	A	experiences.c.booking.com
5.57.16.214	A	images.activehotels.com
5.57.16.214	A	www-l.bookinglokal.com
5.57.16.216	A	autocomplete.c.booking.com
5.57.16.219	PTR	www.activehotels.de
5.57.16.220	PTR	www.booking.com
5.57.16.220	A	wearebooking.com
5.57.16.220	A	hotels-anquilla.com
5.57.16.223	PTR	www.activehotels.es
5.57.16.227	A+PTR	clicktale.booking.com
5.57.16.228	A+PTR	ee1.booking.com
5.57.16.229	A	www.bookaahotels.com
5.57.16.229	A	www-sni.c.booking.com
5.57.16.229	A	track.reservation-booking-system.com
5.57.16.230	A+PTR	admin.bookings.org
5.57.16.233	A+PTR	supply-xml.booking.com
5.57.16.233	A	partner-data.c.booking.com
5.57.16.233	A	supply-xml.c.booking.com
5.57.16.234	A+PTR	distribution-xml.booking.com
5.57.16.234	A	distribution-xml.c.booking.com
5.57.16.235	A	www-tls11.booking.com
5.57.16.237	A+PTR	xml.booking.com
5.57.16.239	A+PTR	w1.booking.com
5.57.16.239	A	w5.booking.com
5.57.16.239	A	w2.booking.com
5.57.16.240	A	suiteportal.booking.com
5.57.16.243	A	archibaldatthecharlesbridge.cz
5.57.16.243	A	www.archibaldatthecharlesbridge.cz
5.57.16.243	A	suite-sites.booking.com
5.57.16.244	A+PTR	carrier-staging.booking.com
5.57.16.245	A	carrier.booking.com
5.57.16.245	A	carrier.c.booking.com
5.57.16.246	PTR	m1.bstatic.com
5.57.16.248	A	*.activehotels.es
5.57.16.248	A	hotels.activehotels.it
5.57.16.248	A	activehotels.es
5.57.16.249	A	api.booking.com
5.57.16.249	A	api.c.booking.com
5.57.16.250	A+PTR	mobile-l.api.booking.com
5.57.16.250	A	mobile.api.booking.com
5.57.16.250	A	mobile-api.c.booking.com
5.57.16.253	A+PTR	secure-supply-xml-dummy.booking.com