shell:$ nslookup -timeout=2 -retry=1 'test-gateway.instagram.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
test-gateway.instagram.com	canonical name = dgw-ig.c10r.facebook.com.
Name:	dgw-ig.c10r.facebook.com
Address: 57.144.172.196
Name:	dgw-ig.c10r.facebook.com
Address: 2a03:2880:f356:c4:face:b00c:0:21ba