No. NEVER hang up after calling 9-1-1. If you accidentally misdial 9-1-1 you cannot possibly hang up fast enough to cancel the call. Many 9-1-1 hang up calls are crimes in progress. We consider every 9-1-1 hang up to be an emergency unless we are able to verify otherwise. We always call 9-1-1 hang up calls back. If we receive an answering machine, no answer, busy signal, or the person sounds suspicious, law enforcement is immediately dispatched.