about PTR for an IP

["Jon Smart" <jon@daydaylive.us>]

Hello,

I know a hostname can point to multi-IPs.

but can an IP have multi hostnames in PTR?

164.0.217.172.in-addr.arpa. 86400 IN	PTR	mia09s16-in-f4.1e100.net.
164.0.217.172.in-addr.arpa. 86400 IN	PTR	ord38s42-in-f4.1e100.net.
164.0.217.172.in-addr.arpa. 86400 IN	PTR	yyz08s10-in-f164.1e100.net.

this IP does seem like so. I never know this.

Thanks.