i am on a closed network.
we do not use the ICANN address blocks
i have asked for a few years now for a means to specify an address sub net range to naming schema
each time i'm told it is hard-coded.
one CAN edit the file
BUT, you will lose your changes after any update ;
what cant SW simply provide a table look up that allow users to override or customize the range
i suggest a simple CSV with
SUBNET, MASK and TEXT straing