Should I put a single entry for my /48 allocation or 16 /64 entries for the nets I am currently using?

Does it make any difference for performance? Any other concerns? The 192.168 nets I use I have a /24 specified though typically I am only using the lower /26.

In theory, no one out there can 'take over' my unused space without action by my ISP (which some time in the future if they start running out of IPv6 prefixes for their customers they might ask for some back).

Oh, and examples I am finding for specific addresses show v4 addresses plain like:

127.0.0.1;  10.5.4.5;

But with a /128 'prefix' for v6 addresses:

::1/128 ; 2001:0db8:100::4/128;

Is what you do for specific addresses?


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