shell:$ nslookup -timeout=2 -retry=1 'z-m-gateway.facebook.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
z-m-gateway.facebook.com	canonical name = dgw-mini.c10r.facebook.com.
Name:	dgw-mini.c10r.facebook.com
Address: 57.144.172.3
Name:	dgw-mini.c10r.facebook.com
Address: 2a03:2880:f356:3:face:b00c:0:4c63