Where to Find the Serial Number on Any Device

Every device has one — a unique string of characters that identifies it among millions of identical models. Whether you're filing a warranty claim, registering software, reporting a theft, or troubleshooting with support, knowing where to find your serial number saves time and frustration. The challenge is that there's no universal location. Where it lives depends on the type of device, the manufacturer, and sometimes even the generation of the product.

What Is a Serial Number and Why Does It Matter?

A serial number is a manufacturer-assigned identifier unique to a single unit of a product. Unlike a model number (which applies to every device of the same type), a serial number distinguishes your specific device from all others. It's used for:

• Warranty verification — manufacturers match serial numbers to purchase dates
• Repair tracking — service centers log work against the serial number
• Theft recovery — police and insurers use serial numbers to identify stolen property
• Software activation — some licenses are tied to hardware serial numbers
• Firmware updates — some manufacturers use serial ranges to push targeted updates

Where to Look: By Device Type

Smartphones and Tablets 📱

For most phones and tablets, the serial number is accessible in at least two places:

• In Settings: On iOS devices, go to Settings → General → About. On Android, it's typically Settings → About Phone → Status, though the exact path varies by manufacturer and Android version.
• On the physical device: Check the SIM card tray (often engraved there), the back of the device, or inside the original packaging.
• On the box: The retail box almost always has a label with the serial number, IMEI, and model number printed together.

For iPhones specifically, the serial number was printed on the back of older models (pre-iPhone XS era). Newer models removed that text to keep the design clean.

Laptops and Desktop Computers 💻

Laptops typically have the serial number printed on a sticker on the bottom of the chassis. Look for a label that includes barcodes — the serial number is usually listed alongside the model number and regulatory information.

You can also retrieve it through software:

• Windows: Open Command Prompt and type wmic bios get serialnumber — this pulls the serial number stored in the firmware.
• macOS: Go to Apple Menu → About This Mac → System Report or hold Option and click the Apple menu to access System Information directly.
• Linux: The command sudo dmidecode -s system-serial-number typically retrieves it.

For desktop towers, check the side panel, rear of the case, or a sticker on the top. Many manufacturers also embed the serial in the BIOS/UEFI, accessible at boot.

Monitors and Displays

Serial numbers on monitors are almost always on a sticker on the back panel, often near the port cluster or along the bottom edge. Some manufacturers also print it on the base or stand. Detaching the stand sometimes reveals a label underneath.

Printers and Scanners

Check the underside, the back panel, or inside the paper tray compartment. Many printers can also print a configuration page from the control panel that includes the serial number.

Gaming Consoles

Routers and Networking Equipment

Serial numbers on routers are almost always on the bottom label, alongside the default Wi-Fi credentials and MAC address. Some routers also display the serial number in the admin interface — typically under a Status or Device Info section.

When the Label Is Damaged or Missing 🔍

Physical labels wear out. Stickers peel, ink fades, and some users remove them. In those cases:

• Software retrieval (as described above for Windows, macOS, and Linux) is often the most reliable fallback
• Original packaging — the box almost always has the serial on a barcode label
• Digital receipts or registration emails — if you registered the device with the manufacturer, the serial is usually included
• Manufacturer account dashboards — Apple's appleid.apple.com, Google's mydevices, and similar portals often list registered devices with serial numbers

The Variable That Complicates Everything

Here's where it gets less straightforward: even within the same manufacturer, serial number location changes across product generations. A label that was on the back of one iPhone model moved inside the device on the next. A laptop brand that printed the serial on the bottom chassis shifted to storing it only in firmware for a thinner redesign.

The condition of your device matters too. A heavily used device with a worn underside label, a phone with a cracked back, or a device that came without its original box presents a genuinely different challenge than a new device straight from packaging.

Some enterprise or business-grade hardware also uses asset tags alongside (or instead of) manufacturer serial numbers — which can create confusion about which number is needed for a given support request.

What counts as the "right" place to look comes down to your specific device, its age, its condition, and what you need the serial number for — and those factors vary enough that the path forward really does depend on the hardware in front of you.