Robtex

Up: 64.74.136.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.74.136.0/25
Down right: 64.74.136.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.74.136.1	A+PTR	fw.ext.23andme.net
64.74.136.1	A	fw.23andme.net
64.74.136.2	A+PTR	unused.ext.23andme.net
64.74.136.3	A	unused.ext.23andme.net
64.74.136.5	PTR	nat1-reserved.ext.23andme.net
64.74.136.7	PTR	objects.ext.23andme.net
64.74.136.7	A	23andmeobjects.com
64.74.136.10	PTR	www.ext.23andme.net
64.74.136.10	A	23andme.be
64.74.136.10	A	2a3ndme.net
64.74.136.12	A+PTR	store.ext.23andme.net
64.74.136.13	PTR	was-srv0103.ext.23andme.net
64.74.136.21	A+PTR	sh02.ext.23andme.net
64.74.136.22	PTR	unused.ext.23andme.net
64.74.136.22	A	23andme.co.uk
64.74.136.23	PTR	was-srv0203.ext.23andme.net
64.74.136.23	A	23andme.dk
64.74.136.24	A+PTR	eu.ext.23andme.net
64.74.136.25	A+PTR	fi.ext.23andme.net
64.74.136.29	A+PTR	ans1.ext.23andme.net
64.74.136.29	A	ans1.23andme.net
64.74.136.30	A+PTR	ans2.ext.23andme.net
64.74.136.30	A	ans2.23andme.net
64.74.136.32	A+PTR	unused.ext.23andme.net
64.74.136.34	A+PTR	unused.ext.23andme.net
64.74.136.35	A+PTR	unused.ext.23andme.net
64.74.136.36	A+PTR	unused.ext.23andme.net
64.74.136.37	A+PTR	unused.ext.23andme.net
64.74.136.38	A+PTR	unused.ext.23andme.net
64.74.136.39	A+PTR	unused.ext.23andme.net
64.74.136.40	A+PTR	unused.ext.23andme.net
64.74.136.41	A+PTR	unused.ext.23andme.net
64.74.136.42	A+PTR	unused.ext.23andme.net
64.74.136.43	A+PTR	unused.ext.23andme.net
64.74.136.44	A+PTR	unused.ext.23andme.net
64.74.136.45	A+PTR	unused.ext.23andme.net
64.74.136.46	A+PTR	unused.ext.23andme.net
64.74.136.47	A+PTR	unused.ext.23andme.net
64.74.136.48	A+PTR	unused.ext.23andme.net
64.74.136.49	A+PTR	unused.ext.23andme.net
64.74.136.50	A+PTR	unused.ext.23andme.net
64.74.136.51	A+PTR	unused.ext.23andme.net
64.74.136.52	A+PTR	unused.ext.23andme.net
64.74.136.53	A+PTR	unused.ext.23andme.net
64.74.136.54	A+PTR	unused.ext.23andme.net
64.74.136.55	A+PTR	unused.ext.23andme.net
64.74.136.56	A+PTR	unused.ext.23andme.net
64.74.136.57	A+PTR	unused.ext.23andme.net
64.74.136.58	A+PTR	unused.ext.23andme.net
64.74.136.59	A+PTR	unused.ext.23andme.net
64.74.136.60	A+PTR	unused.ext.23andme.net
64.74.136.61	A+PTR	unused.ext.23andme.net
64.74.136.62	A+PTR	unused.ext.23andme.net
64.74.136.165	PTR	snat-client2.nf.23andme.net
64.74.136.193	PTR	fw01.acc.23andme.net
64.74.136.195	A+PTR	fw0201.acc.23andme.net
64.74.136.196	A+PTR	r1prod.acc.23andme.net
64.74.136.243	A	vpn-sv4.23andme.org
64.74.136.244	A+PTR	colovpn.vpn-dmz.23andme.net
64.74.136.253	A+PTR	fw41-alt.rtr-fw.23andme.net
64.74.136.255	PTR	bro.t3acc-old.23andme.net