For the last 30 years, I've used an Australian Post Office box as my official mailing address, and they just forward the mail to wherever I happen to be at the time.
It saves needing to update my details with everyone whenever I move.
But it's not really like DNS: my PO Box address isn't really any more memorable than a physical address, for instance.
There are commercial services that do the same thing in the US, at least.
Not the person you asked, but I've been doing the same for a few years.
The cost of a PO box seems to vary based on the location (and even the location within the Post Office if it's large). I pay ~$110 per year for the PO box.
It saves needing to update my details with everyone whenever I move.
But it's not really like DNS: my PO Box address isn't really any more memorable than a physical address, for instance.
There are commercial services that do the same thing in the US, at least.