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

Non-authoritative answer:
Name:	js.arcgis.com
Address: 18.160.18.40
Name:	js.arcgis.com
Address: 18.160.18.84
Name:	js.arcgis.com
Address: 18.160.18.107
Name:	js.arcgis.com
Address: 18.160.18.111