Where to Find a Serial Number on Any Device or Product

Every device, appliance, and piece of hardware ships with a serial number — a unique identifier assigned by the manufacturer. Knowing where to find it can mean the difference between a smooth warranty claim and hours of frustration. The challenge is that serial numbers aren't stored in one predictable place. Where yours lives depends heavily on the type of device, the manufacturer, and whether you still have the original packaging.

What Is a Serial Number and Why Does It Matter?

A serial number is a manufacturer-assigned alphanumeric string that uniquely identifies a specific unit of a product. It's different from a model number, which identifies the product type — a serial number identifies your specific device among potentially millions of identical ones.

You'll need it for:

• Warranty registration and claims
• Theft recovery or insurance documentation
• Support tickets and repair requests
• Software licensing tied to hardware
• Checking recall notices

Physical Locations: Where to Look First 🔍

For most hardware, the serial number appears somewhere on the physical device. Common spots vary by category:

Laptops and Desktop Computers

• Underside of the chassis — typically on a sticker near the battery or ventilation area
• Inside the battery compartment — remove the battery to find it on many older laptops
• Back panel — common on desktop towers, often near the power supply area
• On the original box — if you kept the packaging, the serial number is almost always printed on a label alongside the barcode

Smartphones and Tablets

• Settings menu — the most reliable method (more on this below)
• SIM card tray — on some iPhone models, the serial number is engraved on the tray itself
• Back of the device — older iPhone models printed it directly on the back casing; many Android devices use a sticker under a removable back cover
• Inside the SIM slot — visible when the tray is removed on certain models

Monitors and TVs

• Back panel sticker — almost universal; look near the ports or VESA mount holes
• Bottom edge — some monitors place the label along the lower bezel

Routers and Networking Equipment

• Bottom or rear sticker — usually the same label that shows the default Wi-Fi password and MAC address

Printers

• Bottom or rear of the unit
• Inside the paper tray or ink/toner compartment

Software and Settings: Finding It Without Flipping Anything Over

For many devices, you can retrieve the serial number through software — especially useful if the physical sticker is worn, the device is mounted, or you're doing remote support.

Windows

Open Settings → System → About. The serial number may appear here, though this depends on whether the manufacturer wrote it to the system firmware. Alternatively, open Command Prompt and run:

wmic bios get serialnumber 

This pulls the serial number directly from the BIOS/UEFI chip — generally more reliable than reading a worn sticker.

macOS

Go to Apple menu → About This Mac. The serial number appears in the overview panel. On newer macOS versions, you may need to click System Report to find it. You can also hold the Option key and click the Apple menu to jump directly to System Information.

iPhone and iPad (iOS/iPadOS)

Navigate to Settings → General → About. Scroll down to find Serial Number. On devices running iOS 16 and later, you can long-press the serial number to copy it — useful when filing support requests.

Android

Go to Settings → About Phone (or About Device). The path varies slightly between manufacturers — Samsung devices often nest it under About Phone → Status Information, while stock Android shows it directly on the About screen.

Chrome OS

Open Settings → About ChromeOS → Additional Details. The serial number displays alongside the firmware version.

The Original Packaging and Documentation

If the device is new or you kept the box, the serial number almost always appears:

• On a barcode label on the outside of the box
• On an included warranty card
• In the manufacturer's setup documentation

Retailers also print serial numbers on receipts for high-value items like laptops, game consoles, and professional cameras — another reason to keep purchase records.

Manufacturer Account Portals

If you registered a product or purchased it through the manufacturer's own store, the serial number is often stored in your account. Apple devices registered with an Apple ID appear in appleid.apple.com. Many PC manufacturers — Dell, HP, Lenovo — show device serial numbers in their support portals once you sign in with your account.

When the Serial Number Is Hard to Find or Worn Off

Stickers degrade. Devices get repainted. Engravings wear smooth. In those cases:

• Check the BIOS/firmware using the software methods above
• Contact the original retailer with your proof of purchase — they may have the serial on file
• Check your email if you registered the product at purchase; manufacturers often include the serial in confirmation emails
• Look at the original box if stored

Variables That Affect Where Your Serial Number Lives

The same type of device from different manufacturers can store the serial number in completely different places. A few factors shape this: 🗂️

Enterprise hardware — servers, switches, managed networking equipment — often uses a Service Tag or Asset Tag instead of the term "serial number," but the concept and function are identical.

The Part That Depends on Your Situation

How straightforward this is for you comes down to a combination of factors no general guide can predict: whether your sticker is still intact, which operating system you're on, whether the manufacturer embedded the serial into firmware, and whether you kept your purchase records. Some users will find it in 10 seconds through Settings; others dealing with older hardware or worn labels may need to dig through BIOS tools or contact support. The right path forward is the one that matches the specific device in front of you.