shell:$ nslookup -timeout=2 -retry=1 'gateway.internalfb.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
gateway.internalfb.com	canonical name = dgw-intern.c10r.facebook.com.
Name:	dgw-intern.c10r.facebook.com
Address: 31.13.80.233
Name:	dgw-intern.c10r.facebook.com
Address: 2a03:2880:f00e:ec:face:b00c:0:80bc