Robtex

Up: 137.221.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 137.221.104.0/23
Down right: 137.221.106.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
137.221.104.222	A	facebookaans.api.uca.cloud.blizzard.com
137.221.104.222	A	facebookz-mania.cloud.blizzard.com
137.221.104.222	A	blogger-customize-tips.cloud.blizzard.com
137.221.104.237	A	facebookz-mania.cloud.blizzard.com
137.221.104.237	A	github-redirectorv4.cloud.blizzard.com
137.221.105.152	A	us.actual.battle.net
137.221.106.14	A	api.blizzard.com
137.221.106.19	A	us.patch.battle.net
137.221.106.20	A	account.classic.blizzard.com
137.221.106.21	A	us.bsap.battle.net
137.221.106.23	A	us.version.battle.net
137.221.106.24	A	cafe-admin.blizzard.com
137.221.106.24	A	cafe.blizzard.com
137.221.106.69	A	las1a-w3-rclient.classic.blizzard.com
137.221.106.102	A	mobile-service.blizzard.com
137.221.106.102	A	us.mobile-service.blizzard.com
137.221.106.102	A	us.shop.battle.net
137.221.106.104	A	esmx.nydus.battle.net
137.221.106.104	A	koboldsandcatacombs.com
137.221.106.104	A	playheroes.com
137.221.106.111	A	cache-cms-ext-us.battle.net
137.221.106.111	A	cache-us.battle.net
137.221.106.121	A	us.api.blizzard.com
137.221.106.155	A	telemetry-webhooks.battle.net
137.221.106.169	A	las1b-w3-rclient.classic.blizzard.com