Where to Find the Serial Number on Any Device or Piece of Hardware

Every device you own has a serial number — a unique identifier assigned during manufacturing that distinguishes your specific unit from every other one that came off the same production line. Whether you need it for a warranty claim, insurance documentation, tech support, or resale verification, knowing where to look saves time and frustration.

The challenge is that there's no universal location. Serial numbers appear in different places depending on the type of device, the manufacturer, and sometimes the model year. Here's a practical breakdown of where to find them.

What a Serial Number Actually Is

A serial number (sometimes abbreviated as S/N) is a manufacturer-assigned alphanumeric string — typically between 8 and 20 characters — that identifies a specific unit of a product. It's distinct from a model number, which identifies the product type, not the individual device.

Serial numbers matter for:

• Warranty registration and claims — manufacturers use them to verify purchase eligibility
• Insurance documentation — proof of ownership for specific hardware
• Tech support — agents use them to pull service history and compatible software versions
• Theft reporting — law enforcement can log serial numbers to flag stolen goods
• Resale verification — buyers can check whether a device has been reported stolen

Physical Locations: Where to Look on the Device Itself 🔍

For most hardware, the serial number is printed directly on the device. The exact spot varies by category.

Laptops and Notebooks

• Bottom panel — the most common location; look for a printed sticker or engraved text near the center or edge
• Under the battery — on older models with removable batteries, the serial number is often on a label inside the battery compartment
• Near the keyboard hinge — some manufacturers engrave it on the chassis near the screen hinge

Desktop Computers and Towers

• Side or rear panel — typically on a sticker near the manufacturer's logo or ventilation area
• Top of the case — some tower designs place it here for quick scanning

Smartphones

• Rear casing — common on older Android devices and some budget models
• SIM card tray — many modern iPhones and Android flagship phones print the serial number on the SIM tray itself
• Original packaging — the retail box almost always has the serial number on a label alongside the barcode

Tablets

Similar to smartphones — check the rear casing, SIM tray if applicable, and original box. The text is often very small and printed near the regulatory markings.

Monitors and Displays

• Rear panel — usually on a sticker near the power input or mounting area
• Bottom edge — some displays place it on the underside of the bezel

Routers, Modems, and Networking Gear

• Underside label — almost universally found here, often alongside the default Wi-Fi credentials and MAC address

Printers

• Rear or underside — most printers carry the serial number on a label at the back or bottom
• Inside the paper tray or ink/toner compartment — some manufacturers place it inside a panel that's only visible when the device is open

Finding the Serial Number Through Software

When the physical label is worn, missing, or simply hard to reach, software lookup is often faster.

Windows PCs

Open Command Prompt or PowerShell and run:

wmic bios get serialnumber 

This pulls the serial number stored in the system firmware (BIOS/UEFI). It won't work if the manufacturer left that field blank, which occasionally happens on custom-built or white-label machines.

Alternatively, check Settings → System → About — some OEMs display it here.

macOS

Go to Apple Menu → About This Mac → More Info (or System Information on older versions). The serial number appears alongside hardware specs. You can also hold Option and click the Apple Menu to see it more quickly on some macOS versions.

iPhone and iPad

Navigate to Settings → General → About and scroll to Serial Number. On iPhones running iOS 16 or later, you can also find it in the same section alongside the IMEI.

Android Devices

The path varies by manufacturer, but the general route is Settings → About Phone → Status → Serial Number. Some Android skins (Samsung One UI, for example) place it directly under About Phone without a sub-menu.

Chromebooks

Go to Settings → About ChromeOS → Diagnostics, or check chrome://system and search for "serial."

When the Label Is Gone or Illegible 🔎

Physical labels wear off, especially on heavily used hardware. A few fallback options:

Manufacturer accounts are increasingly useful here. Apple's appleid.apple.com, Samsung's account.samsung.com, and similar portals display serial numbers for devices registered to your account — which is a good reason to register devices at purchase.

The Variable That Changes Everything

Where your serial number lives depends on factors that vary significantly: the manufacturer's design choices, the device category, the model generation, and whether the device has ever been repaired (replacement housings don't always carry the original label).

A serial number that was easily visible on a 2018 model of a device may be in an entirely different location on its 2023 successor. Regulatory labeling requirements also differ by region, which can shift where manufacturers print compliance information — and serial numbers often appear alongside those markings.

For devices covered under business or enterprise contracts, serial number management may sit entirely within IT asset systems, not on the physical unit or your personal accounts. And for older or vintage hardware, the label may follow conventions that predate current standards, making them harder to interpret even once found.

Your specific device, its age, how it's been used, and where it was purchased all shape exactly what you'll find and where.