I am interested in querying the quarantine list for the existence of a given mobile number and haven't been able to find anything in the API documentation. Is this possible?

I've seen a number of posts about older versions of Campaign and the inSMS table. We would like to setup a workflow to process the records in this table on a 10 minute basis to set some field values based on reply codes received. I'm struggling to find out how to select from this table within a query action in the workflow. Can anyone provide info on how to query this table?