arp command with vendor information  
```sh
sudo arp -n \
  | grep -viE "inc|iface" \
  | while read -r ip type mac state ifname; do vendor=$(echo ${mac^^} \
  | sed 's/://g' \
  | cut -c 1-6); echo -ne "${ifname}\t${ip}\t${mac} $(grep ${vendor} /usr/share/ieee-data/oui.txt \
  | cut --output-delimiter=" " -c 1-6,23- )\n"; done