This read-only status shows the current registration state of a dial number: vrOk means the registration is healthy, vrAgedOut means it timed out without being refreshed, vrTableFull means it could not register because the table was full, and vrMemallocFail means it failed due to a memory allocation error. An admin checking this after users report a phone extension not working can quickly see whether the failure was aging, capacity, or a memory problem on the router.