diff --git a/aircon.sh b/aircon.sh
index 6e09c6d..82e5a6f 100755
--- a/aircon.sh
+++ b/aircon.sh
@@ -69,7 +69,8 @@ function usage() {
     echo "    -s          Validate config file then exit."
     echo "    -S[H]       Show configured rules in human-readable format"
     echo "                (HTML if -H given, otherwise ANSI)."
-    echo "    -w          List which zone owners' devices are available then exit."
+    echo "    -w          List which people are available then exit."
+    echo "    -W          List zone owners' devices are available then exit."
     echo "    -t num      Specify degrees below min temperature before taking action."
     echo "    -T num      Specify degrees above max temperature before taking action."
     echo "    -y          Actually run commands/db inserts.  By default, commands are just displayed."
@@ -1173,9 +1174,9 @@ function canping() {
         if [[ -z $ip ]]; then
             thisrv=1
         else
-            #arp -d $ip >/dev/null 2>&1
-            #ping -c1 -w1 -n -q $ip >/dev/null 2>&1 &
-            #sleep 0.3
+            arp -d $ip >/dev/null 2>&1
+            ping -c1 -w1 -n -q $ip >/dev/null 2>&1 &
+            sleep 0.3
             mac=$(arp -n $ip)
             mac=$(echo "$mac" | egrep -v "Host|xpired" | awk '{print $2}')
             [[ $mac == *:* ]] && thisrv=0 || thisrv=1
@@ -1550,7 +1551,7 @@ cronmode=0
 logmode=0  #0=none, 1=csv_file, 2=local influxdb
 influxdb=""
 influxhost="127.0.0.1"
-showwho=0
+showwho=0 # 1 = show people, 2 = show owners
 limit=$DEFAULTLIMIT
 profiler=0
 csvfile="$DEFAULT_CSVFILE"
@@ -1574,7 +1575,7 @@ fi
 
 ALLARGS="$ALLARGS $*"
 
-optstring="A:cD:f:hHi:I:k:l:Lo:pmsSt:T:wx:y"
+optstring="A:cD:f:hHi:I:k:l:Lo:pmsSt:T:wWx:y"
 while getopts "$optstring" i $ALLARGS; do
     case "$i" in
         h)
@@ -1640,6 +1641,9 @@ while getopts "$optstring" i $ALLARGS; do
         w)
             showwho=1
             ;;
+        W)
+            showwho=2
+            ;;
         x)
             MYAIR="${OPTARG}"
             ;;
@@ -1679,7 +1683,7 @@ else
     exit 1
 fi
 
-if [[ $showwho -ne 1 ]]; then
+if [[ $showwho -eq 0 ]]; then
     if [[ -z $MYAIR ]]; then
         MYAIR=$(which myair)
         if [[ $? -ne 0 ]]; then
@@ -1724,6 +1728,31 @@ if [[ $showwho -eq 1 ]]; then
     done
     echo
     exit 0
+elif [[ $showwho -eq 2 ]]; then
+    # get max device hostname length
+    maxlen=1
+    for x in ${ownerhost[@]}; do
+        [[ ${#x} -gt $maxlen ]] && maxlen=$((${#x} + 3))
+    done
+    # get a list of all devices
+    TFORMAT="${BOLD}${UNDERLINE}%-${maxlen}s%-16s${PLAIN}\n"
+    HFORMAT="%-${maxlen}s${GREEN}%-16s${PLAIN}\n"
+    AFORMAT="%-${maxlen}s${RED}%-16s${PLAIN}\n"
+    alldevs=$(echo "${ownerhost[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' ')
+    echo
+    printf "$TFORMAT" "Devices" "Availability"
+    for x in $alldevs; do
+        if canping "${x}"; then
+            thisform="$HFORMAT"
+            str="Available"
+        else
+            thisform="$AFORMAT"
+            str="Unavailable"
+        fi
+        printf "$thisform" "${x}" "$str"
+    done
+    echo
+    exit 0
 fi