IP address delegation

My network provider has delegated to me control of reverse DNS for my subnet, meaning I'm able to set the PTR records for my IPs.

However, when I do a lookup for my IPs via a site like Samspade.org, while the full domain shows up, the ownership of it still clearly list my network provider.

Does anyone know what needs to be done here to get rid of my network provider's info?

 

 

 

 

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