shell:$ nslookup -timeout=2 -retry=1 'fb-s-a-a.akamaihd.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
fb-s-a-a.akamaihd.net	canonical name = a2047.dscg.akamai.net.
Name:	a2047.dscg.akamai.net
Address: 23.199.54.22
Name:	a2047.dscg.akamai.net
Address: 23.199.54.24
Name:	a2047.dscg.akamai.net
Address: 23.199.54.6
Name:	a2047.dscg.akamai.net
Address: 23.199.54.8
Name:	a2047.dscg.akamai.net
Address: 23.199.54.25
Name:	a2047.dscg.akamai.net
Address: 23.199.54.23
Name:	a2047.dscg.akamai.net
Address: 23.199.54.21
Name:	a2047.dscg.akamai.net
Address: 23.199.54.13
Name:	a2047.dscg.akamai.net
Address: 23.199.54.12
Name:	a2047.dscg.akamai.net
Address: 2600:1405:d400:11::17c7:3606
Name:	a2047.dscg.akamai.net
Address: 2600:1405:d400:11::17c7:3617
Name:	a2047.dscg.akamai.net
Address: 2600:1405:d400:11::17c7:3614
Name:	a2047.dscg.akamai.net
Address: 2600:1405:d400:11::17c7:3612
Name:	a2047.dscg.akamai.net
Address: 2600:1405:d400:11::17c7:360a