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That just refers to the first time the name was registered, which may have been by someone totally unrelated to the current website who then sold it on later.

sure but it never expired in that timeframe :P

even if it expires, the domain age will always go back to the first time it was registered

ok, I think the metric I refer to was then without expiration. Thanks for the clarification.

As a former domain hunter i had a table of metrics to look at :)