How do I look up a pet microchip number?

Enter the 9, 10, or 15-digit chip number in the search box above. We will search AAHA's universal database which covers 500+ registries including AKC Reunite, HomeAgain, PetLink, and 24PetWatch.

Free Pet Microchip Lookup

Q: What is a pet microchip?

A pet microchip is a small radio-frequency identification (RFID) device, about the size of a grain of rice, implanted under your pet's skin. It stores a unique ID number linked to your contact information in a registry.

Q: What if the microchip isn't registered?

If no registry shows a match, the chip may be unregistered. We provide direct links to register the chip in the top free registries. Registration typically takes 5 minutes and is free or low cost.

Q: How many digits is a microchip number?

Most microchips in the US use a 15-digit ISO format number. Older chips may be 9 or 10 digits. All formats are accepted in our lookup.

Search AKC Reunite, HomeAgain, 24PetWatch, PetLink, and 500+ registries with one search. Free & instant.

🔒 Free forever ⚡ Instant results 🌐 500+ registries searched

How the Lookup Works

Enter chip number

Find it on vet paperwork, shelter intake form, or scan with a reader

We search all registries

AAHA universal database covers 500+ registries in the US simultaneously

See the result

Find which registry holds the record and the contact information to reach the owner

500+

Registries searched

10M+

Microchips in database

52%

Lost pets without ID reunited

238%

Higher return rate with chip

All Major Registries

Our lookup searches through the AAHA Universal Pet Microchip Lookup which covers these registries and hundreds more:

🔍 AAHA Universal Lookup Searches 500+ registries in one click Visit → 🐕 AKC Reunite American Kennel Club registry Visit → 🏠 HomeAgain Merck Animal Health network Visit → 👁 24PetWatch Nationwide microchip registry Visit → 🔗 PetLink Datamars registry Visit → 💚 Found Animals Free registry by Found Animals Foundation Visit → 📡 AVID American Veterinary Identification Devices Visit →

Microchip FAQ

What is a pet microchip?

A microchip is a tiny RFID device (size of a grain of rice) implanted under your pet's skin, usually between the shoulder blades. It holds a unique ID number linked to your contact info in a registry database.

How many digits is a microchip number?

Most modern microchips use a 15-digit ISO standard number. Older chips may be 9 or 10 digits. All formats work in our lookup.

What if the microchip isn't registered?

An unregistered chip provides zero protection — it exists in the pet but is not linked to any owner. Registration is free or very low cost. We link directly to the top free registries above.

Can I look up someone else's lost pet?

Yes. If you found a lost pet, scan the chip at any vet, shelter, or pet store and enter the number here to find the registry that holds the owner's contact info.

Is microchipping required by law?

Requirements vary by state and city. Many cities in the US require microchipping for licensed dogs. Even where it's not mandatory, it's strongly recommended — microchipped pets are returned to their owners at more than twice the rate of unchipped pets.

How much does microchipping cost?

A vet implant typically costs $25–$50. Many shelters and low-cost clinics offer it for $10–$20. The chip itself is a one-time cost; registry fees vary but many registries are free for life.

Lost Your Pet?

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For Shelters & Vet Offices

Afinderly's microchip lookup is free to use and link to from your website. Add a direct link to help pet owners and found-animal finders look up chips instantly:


      <a href="https://afinderly.com/find/microchip" target="_blank">Look Up a Pet Microchip — Free</a>

Linking to our lookup tool helps lost pets get home faster.