The Apple Serial Number Decoder reads the information Apple built into serial numbers issued before roughly March 2021: the manufacture year and week, the factory that built the device, and a model (configurator) code — decoded entirely in your browser, with no account needed and nothing uploaded. This walks through decoding a serial, reading each field, and understanding why a newer device's serial won't decode at all.
Before you start
Open the Apple Serial Number Decoder — no account needed, since decoding happens entirely in your browser and the serial is never sent to our servers.
The decoder works with 11- and 12-character serials, the encoded formats Apple used from roughly 1999 to early 2021. A 10-character serial is Apple's newer randomized format, used on devices made from roughly March 2021 on — it encodes no manufacture or model information at all, by design.
Decoding an Apple serial number step by step
- Open the Apple Serial Number Decoder — no account needed.
- Type or paste the serial number into the box.
- Click "Decode" (or press Enter).
- Read the serial format, manufacture year and week, factory code, and model code the tool found.
- For warranty or AppleCare status, which this tool doesn't provide, follow the link to Apple's official coverage checker.
Reading the results
A decoded serial shows:
- Serial format — 12 characters (encoded format, 2010 to early 2021) or 11 characters (older encoded format, roughly 1999 to 2012).
- Manufactured — the year and week the device was built. Some year codes are ambiguous, in which case both possible years are shown.
- Factory code — where recognized, the site or manufacturing partner tied to that code, drawn from a community-documented, intentionally conservative reference list; an unrecognized code is labeled as such rather than guessed.
- Model code — the last four characters of a 12-character serial, or the last three of an 11-character serial, resolved against a bundled reference list of more than 8,400 Apple-published model codes.
A serial the decoder can't place — the wrong length, characters Apple's format never uses, or date characters that don't match the documented encoding — gets a plain-language explanation instead of a guessed result.
Making the call
The model code, not the year or factory, is what pins down exactly which product you're holding — it resolves against Apple's own product-info reference data. Treat the factory code as background context, not a grading input: it records where the unit was assembled, not its condition.
If a serial won't decode at all, check its length before assuming something's broken. A 10-character serial isn't an error — it means the device is new enough that Apple stopped encoding this information, and Apple's own official page is the only way to identify it or check coverage from there.
When something looks wrong
- The tool says the characters never appear in an Apple serial. Apple serials use only letters and digits — check for a copied space, dash, or other stray character.
- It's 11 or 12 characters, but the date won't decode. The length matches an encoded-era serial, but the year or week character isn't one Apple's documented alphabet uses — it may be mistyped. Verify it on Apple's official checker.
- It's exactly 10 characters and shows no manufacture info. That's expected, not a bug — Apple switched to random, information-free serials on devices made from roughly March 2021 on.
- The model code shows as unrecognized. That's common on some 2020–2021 units and accessories whose code isn't in the bundled reference list — the rest of the decoded fields are still accurate.
- You need warranty or AppleCare status. This tool doesn't provide it and never will — Apple publishes no public warranty API. Use Apple's own Check Coverage page.
Frequently asked questions
Can this tool check my Apple warranty or AppleCare status?
No. Apple provides no public warranty API, so coverage status is only available from Apple's own Check Coverage page at checkcoverage.apple.com. This tool only decodes what's embedded in the serial number itself: manufacture year and week, factory, and model code.
Why didn't my serial number decode?
Check its length first. An 11- or 12-character serial should decode; a 10-character serial is Apple's newer randomized format, used on devices made from roughly March 2021 on, and encodes no manufacture or model information at all — that's expected, not an error. Any other length, or characters outside letters and digits, isn't a recognized Apple serial format.
Is my serial number ever sent anywhere when I decode it?
No. Decoding runs entirely in JavaScript in your browser — the serial is never uploaded or sent to our servers or anyone else's.
Why does the tool show two possible years for some serials?
Apple's year-code alphabet cycled through 2010–2019 and then wrapped: the codes for C and D were reused for 2020, and F was reused for early 2021. A serial with one of those codes legitimately matches two years, so the decoder shows both rather than guessing — the model code usually settles which one applies.
What if the tool doesn't recognize the factory or model code?
It says so rather than guessing. Apple doesn't publish its factory-code list, so the tool's reference is community-documented and intentionally conservative; the model code reference, drawn from Apple's own product-info data, covers more than 8,400 codes but not every one — recent 2020–2021 units and some accessories are the most common gaps.
Try it
Decode an Apple serial number and read its manufacture date, factory, and model code — no account needed.