Store TAC in subscriber info

[alexeymx]

hello everyone, not sure if my question is relevant or not.

I case of MVN setup i would like to know last known TAC and maybe even last known UE ip.
Is it implemented in hss service? if not does it make any sense to send as a pull request?

In my case i need to know last known location for compliance but i'm not yet sure if HSS is right place to store that info