shell:$ nslookup -timeout=2 -retry=1 'fb-l-a-a.akamaihd.net'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
fb-l-a-a.akamaihd.net	canonical name = a2047.dscg.akamai.net.
Name:	a2047.dscg.akamai.net
Address: 23.199.54.7
Name:	a2047.dscg.akamai.net
Address: 23.199.54.16
Name:	a2047.dscg.akamai.net
Address: 23.199.54.21
Name:	a2047.dscg.akamai.net
Address: 23.199.54.19
Name:	a2047.dscg.akamai.net
Address: 23.199.54.4
Name:	a2047.dscg.akamai.net
Address: 23.199.54.14
Name:	a2047.dscg.akamai.net
Address: 23.199.54.13
Name:	a2047.dscg.akamai.net
Address: 23.199.54.25
Name:	a2047.dscg.akamai.net
Address: 23.199.54.24
Name:	a2047.dscg.akamai.net
Address: 2600:1407:e800:44::215:90d
Name:	a2047.dscg.akamai.net
Address: 2600:1407:e800:44::215:916
Name:	a2047.dscg.akamai.net
Address: 2600:1407:e800:44::215:917
Name:	a2047.dscg.akamai.net
Address: 2600:1407:e800:44::215:910
Name:	a2047.dscg.akamai.net
Address: 2600:1407:e800:44::215:90e