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

Non-authoritative answer:
app.heygen.com	canonical name = d2xlng2voi5hdv.cloudfront.net.
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 108.139.29.111
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 108.139.29.55
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 108.139.29.63
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 108.139.29.94
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:3200:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:aa00:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:8000:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:e00:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:7200:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:9200:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:c400:1d:4302:50c0:93a1
Name:	d2xlng2voi5hdv.cloudfront.net
Address: 2600:9000:23ca:7600:1d:4302:50c0:93a1