What microchip registration means and why it matters

Microchip registration is the process of recording your pet's microchip number, your contact information, and your pet's details in a database so that if your pet is lost and scanned by a shelter or veterinarian, the scanner can retrieve your phone number and reunite you. The microchip itself — a grain-of-rice-sized implant placed under your pet's skin — is useless without registration, because the number alone tells a scanner nothing about who owns the animal.

Most veterinarians implant the microchip during a routine visit, but registration happens separately and is your responsibility. Many people assume the vet handles it, but most do not — they hand you a card with the microchip number and expect you to register it yourself. If you do not register, a shelter that scans your lost pet will see only a number with no way to contact you.

Registration is free or very low-cost, takes about ten minutes, and is permanent unless you move or change your phone number. Once registered, your information stays in the database even if you change vets or move to a different state.

Key Takeaways

  • The microchip number is printed on a card your vet gives you at the time of implant, and you need that number to register.
  • Registration happens through the microchip manufacturer's database, not through your vet, and is your responsibility to complete.
  • You can register online, by phone, or by mail, and the process takes about ten minutes and costs nothing or a small one-time fee.
  • If you move or change your phone number, you must update your registration so shelters can reach you if your pet is found.

Finding your microchip number and manufacturer

Your microchip number appears on a small card your veterinarian gave you when the chip was implanted. The card is usually wallet-sized and printed with the number in large text. If you cannot find the card, ask your vet's office for a copy — they keep records of every microchip they implant and can print the number again.

The card also lists the manufacturer's name. Common manufacturers include HomeAgain, AKC Reunite, 24PetWatch, and Microchip ID Registry. If the card does not list the manufacturer, your vet can tell you which one they used. The manufacturer matters because each one runs its own database, and you must register with the correct one.

If you adopted your pet and do not have the original card, contact the shelter or rescue where you got the pet — they usually have a record of the microchip number and manufacturer. If that fails, your vet can scan the pet and read the number directly from the chip.

Registering through the manufacturer's website

Most microchip manufacturers offer online registration through their website. Go to the manufacturer's site (for example, homeagain.com or akcreunite.org), look for a "Register" or "Register Your Pet" button, and click it. You will be asked to enter the microchip number, your name, address, phone number, and email address, plus your pet's name, species, breed, and color.

Some sites ask for a small one-time registration fee, usually between $0 and $20. Others are free. The fee is one-time only and covers the life of the pet — there are no annual renewal costs. After you submit the form, the database updates immediately, and you should receive a confirmation email with your registration details.

Keep the confirmation email or print it for your records. If your pet is ever scanned, the shelter will call the number you registered, so make sure it is current and that you answer calls from unknown numbers.

Registering by phone or mail if you prefer not to use a website

If you do not want to register online, every manufacturer offers phone registration. Call the number on your microchip card or search the manufacturer's name plus "phone number" to find their customer service line. Have your microchip number and your contact information ready. The representative will ask the same questions as the online form and register your pet over the phone. This usually takes five to ten minutes.

Mail-in registration is also available but slower. Request a registration form from the manufacturer by phone or email, fill it out by hand, and mail it back with a check if there is a fee. Mail registration can take two to four weeks to process, so use it only if you cannot register online or by phone.

Updating your registration if you move or change your number

If you move to a new address or change your phone number, log back into the manufacturer's website and update your information. Most sites let you log in with your email address and a password you created during registration. If you cannot remember your password, use the "Forgot Password" link to reset it.

You can also call the manufacturer to update your information by phone. This is faster than mail and takes just a few minutes. Do not assume the vet will update your registration — you must do it yourself. If a shelter finds your pet and calls an old number, they may not be able to reach you.

Update your registration as soon as you move or change your number, not weeks later. Pets are found and brought to shelters within hours of going missing, so the database must be current.

What happens when a lost pet is scanned

When a shelter, veterinary clinic, or animal control officer scans a found pet, the scanner reads the microchip number and displays it on the screen. The staff member then calls the manufacturer's database with that number. If your registration is current, the database returns your name and phone number, and the shelter calls you immediately.

If your registration is out of date or missing, the database returns no information, and the shelter has no way to contact you. They will try to find the owner by posting the pet's photo online or checking for a lost-pet report, but without your contact information in the database, reunion is much harder and may not happen.

This is why registration is the critical step. The microchip is only a tool to look up your information — the information itself must be in the database and must be correct.

Registering a pet you adopted with an existing microchip

If you adopted a pet that already has a microchip, you must transfer the registration to your name. Contact the manufacturer (the shelter or rescue can tell you which one) and ask to transfer ownership. You will need the microchip number and proof that you are the new owner — usually a copy of your adoption paperwork.

Some manufacturers let you transfer ownership online; others require a phone call or mailed form. The process is free and takes a few minutes. Until you transfer the registration, the database still lists the shelter or the previous owner, and if your pet is found, the shelter will call them instead of you.

If the previous owner cannot be reached or refuses to transfer the registration, some manufacturers will override the old registration if you provide proof of adoption. Call the manufacturer and explain the situation — they have procedures for this.

Frequently Asked Questions

What if I lost the microchip card and do not know the number?

Contact your veterinarian's office and ask them to look up the microchip number in your pet's medical record. If you adopted the pet, call the shelter or rescue where you got it. If neither has the record, your vet can scan the pet and read the number directly from the chip, then give it to you.

Do I have to pay to register a microchip?

Most manufacturers offer free registration, though some charge a one-time fee between $5 and $20. The fee is paid once, not yearly. Check the manufacturer's website or call them to find out whether registration is free or what the cost is.

Can I register my pet's microchip with more than one database?

Yes. Some people register with both the manufacturer's database and a secondary registry like PetLink or PetAmberAlert for extra coverage. This costs a small additional fee but increases the chance a shelter will find your information if they search multiple databases.

What if I change vets — do I need to re-register the microchip?

No. The microchip registration is not tied to your vet. Your information stays in the manufacturer's database no matter which vet you use. You only need to update your registration if you move, change your phone number, or change your pet's name.

How long does it take for registration to show up in the database?

Online registration is usually instant or within a few hours. Phone registration is immediate. Mail registration can take two to four weeks. If your pet goes missing, register online or by phone so the information is in the database right away.