Robtex

Up: 192.121.140.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.121.140.0/25
Down right: 192.121.140.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.121.140.65	PTR	cache.spotify.com
192.121.140.65	A	audio-sp-fra.pscdn.co
192.121.140.65	A	audio-sp-fra.spotify.com
192.121.140.67	A	audio-sp-fra6.spotifycdn.net
192.121.140.67	A	audio-sp-fra.spotifycdn.net
192.121.140.68	A	audio-sp-fra-13.spotifycdn.net
192.121.140.123	PTR	cache.spotify.com
192.121.140.177	PTR	cache.spotify.com
192.121.140.177	A	audio-sp-fra2.pscdn.co
192.121.140.177	A	audio-sp-fra26.pscdn.co
192.121.140.179	A	audio-sp-fra26.spotifycdn.net
192.121.140.180	A	audio-sp-fra2-13.spotifycdn.net