shell:$ nslookup -timeout=2 -retry=1 'dl-obs.official.line.naver.jp'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
dl-obs.official.line.naver.jp	canonical name = cac-dl-obs.official.line.naver.jp.line-zero.akadns.net.
cac-dl-obs.official.line.naver.jp.line-zero.akadns.net	canonical name = d1agdg9cccjmma.cloudfront.net.
Name:	d1agdg9cccjmma.cloudfront.net
Address: 54.230.21.138
Name:	d1agdg9cccjmma.cloudfront.net
Address: 54.230.21.190
Name:	d1agdg9cccjmma.cloudfront.net
Address: 54.230.21.118
Name:	d1agdg9cccjmma.cloudfront.net
Address: 54.230.21.212