# Who’s online: see every device on your network, and get told when one comes or goes

> Who’s online lists the devices on your home or office network with their maker and type, lets you name them, and sends a Mac notification when a device you watch joins or leaves.

FireAI Docs (HisnLabs) · Feature · Available since FireAI 0.1.6
Canonical: https://hisnlabs.com/fireai/en/docs/whos-online

**Where in FireAI:** World map › Who’s online

Know what’s on your Wi-Fi, from the TV to your kid’s phone, without any extra box.

Your network isn’t just your Mac. Phones, TVs, speakers, printers and smart plugs all share it, and some talk a lot. Who’s online shows you who’s there and lets you keep an eye on the ones that matter to you.

## See who’s there

1. Click Who’s online at the top of the World map. The button shows how many devices are online now.
2. Each device shows a type icon (Mac, laptop, phone, tablet, TV, speaker, printer, router, smart home), its maker, and its address on your network.
3. Click Name… to give it a name you’ll recognise, such as “Living-room TV” or “David’s MacBook”. You can also change its type if FireAI guessed wrong.

## Get told when a device comes or goes

Turn on Watch next to a device and FireAI sends a Mac notification when it joins your network (“David’s MacBook is back online”) or leaves it. Handy to know a family member got home, a teenager’s phone is on the Wi-Fi at 2 a.m., or an unfamiliar device just appeared.

> **Note:** Only devices you watch send notifications; everything else is listed quietly. A device is marked offline after about two and a half minutes unseen, so a phone going to sleep for a moment doesn’t set off an alert.

## How FireAI knows

- It reads the list of neighbours your Mac already keeps (the ARP table), once a minute. No scanning, no probing, no packets sent to your devices.
- The maker comes from the official IEEE registry of network-hardware makers, built into FireAI. No lookup goes out to the internet.
- The type is a best guess from the device’s maker and, if you turn on “Look up device names” (off by default, because it asks your DNS server — usually your router — for each device’s name), the name the device gives itself. You can always correct it.

> **Warning:** Most phones and many laptops now use a private, random Wi-Fi address. FireAI shows those as “Private address” rather than inventing a brand; name them once and they stay recognisable on that network. A device that hasn’t talked to your Mac yet may take a moment to appear.

On a network you don’t trust, [Coffee Shop Armor](https://hisnlabs.com/fireai/en/docs/coffee-shop-armor) and [AirDrop Shield](https://hisnlabs.com/fireai/en/docs/airdrop-shield) keep your Mac from being an easy target for the devices around you.

## Read next

- [The World map](https://hisnlabs.com/fireai/en/docs/world-map.md)
- [Coffee Shop Armor: safer on public Wi-Fi, and warned about fake networks](https://hisnlabs.com/fireai/en/docs/coffee-shop-armor.md)
- [AirDrop Shield: know when strangers can see your Mac](https://hisnlabs.com/fireai/en/docs/airdrop-shield.md)
- [What stays on your Mac, and the only times FireAI goes online by itself](https://hisnlabs.com/fireai/en/docs/privacy-promise.md)

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