Accountcode for Inbound Routes

It would be nice to add an accountcode for inbound routes. If an extension has the accountcode set, modules that rely on accountcode for billing only see calls initiated by the extension, but not calls to the extension, specifically those that came via an inbound route. A new field would be needed in the database, a corresponding update to the inbound routes module, and the appropriate code in the function that generates the dialplan upon 'reload'.