shell:$ nslookup -timeout=2 -retry=1 'intern.instagram.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
intern.instagram.com	canonical name = internextern.vvv.facebook.com.
internextern.vvv.facebook.com	canonical name = extern.c10r.facebook.com.
Name:	extern.c10r.facebook.com
Address: 57.144.174.146
Name:	extern.c10r.facebook.com
Address: 2a03:2880:f356:92:face:b00c:0:7c8d