shell:$ nslookup -timeout=2 -retry=1 'event.line-sec.co.jp'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
event.line-sec.co.jp	canonical name = d18svb6hvieh7e.cloudfront.net.
Name:	d18svb6hvieh7e.cloudfront.net
Address: 13.32.241.62
Name:	d18svb6hvieh7e.cloudfront.net
Address: 13.32.241.32
Name:	d18svb6hvieh7e.cloudfront.net
Address: 13.32.241.13
Name:	d18svb6hvieh7e.cloudfront.net
Address: 13.32.241.3