A “not found” result does not always mean a pet’s microchip was never registered. There are several reasons why a readable chip may not appear in an online search.
The number may have been entered incorrectly. The record may be held in another country, stored in a private registry or missing from the lookup service you searched.
This guide explains the most common reasons and what to do next.
First, check the microchip number
One incorrect digit can completely change the result.
Before searching again:
- Check that every digit was copied correctly
- Remove spaces, dashes and other punctuation
- Confirm whether the chip has 9, 10 or 15 digits
- Ask for another scan if the number was handwritten or difficult to read
Do not guess a missing digit. Ask a vet, shelter or rescue organisation to scan the animal again.
The chip may be registered in a different database
There is no single worldwide pet microchip database.
Different countries use national registries, private registries, manufacturer databases and shared lookup services. A chip may be registered correctly but still not appear in the first database you check.
Some lookup tools only search participating registries. Others may tell you which company supplied the chip without confirming whether owner details are available.
This is why a broad search is more useful than checking one database alone.
The registry may not be publicly searchable
Some databases allow anyone to check a chip number. Others are available only to vets, shelters, police, authorised rescuers or registry staff.
A public search may therefore return nothing even though a private record exists.
In these cases, you may need to contact the registry directly or ask a vet or shelter to make the enquiry.
The registration may be very recent
New registrations do not always appear immediately.
The vet, breeder, shelter or rescue may have submitted the details, but the registry may still be processing them.
When a chip was implanted or transferred recently, ask:
- Which registry was used
- When the details were submitted
- Whether the registration was confirmed
- Whether any further action is needed from the owner
Do not assume implantation and registration happened at the same time. They are separate steps.
The chip may never have been registered
A microchip can work perfectly without being linked to an owner.
This may happen when:
- The registration form was never completed
- The fee was not paid
- The vet or breeder expected the owner to finish the process
- The owner believed registration happened automatically
- Paperwork was lost
- The chip was supplied in bulk to a rescue or clinic
AAHA notes that a pet’s chip is registered with a microchip company or registry, not simply with the vet who implanted it.
The pet may have moved to another country
A chip number may point towards one country, while the registration is held somewhere else.
This can happen when a pet:
- Was adopted abroad
- Moved with its owner
- Was imported by a rescue
- Was registered again after entering another country
The first three digits may provide a clue, but they do not always prove where the pet is currently registered.
Some chips use country codes. Others use manufacturer codes that may be sold in many countries.
The registry may have closed or changed
Microchip companies and registries can close, merge, change names or transfer records.
An old certificate may therefore point to a website or company that no longer exists.
When this happens:
- Search the company name together with “microchip registry”
- Check whether another registry took over its records
- Contact the chip manufacturer or distributor
- Ask the vet or shelter that implanted the chip
Registry closures can leave owners unsure where their records went, so it is worth checking old paperwork carefully.
The database may be temporarily unavailable
Sometimes the problem is technical rather than permanent.
A registry may be:
- Offline
- Slow to respond
- Blocking automated searches
- Under maintenance
- Returning an incomplete result
Try again later or contact the registry directly when the information is urgent.
ChipTrace shows when a database could not be checked, so you can tell the difference between “not found” and “not searched.”
The chip may be linked to old or conflicting details
A chip can appear in more than one database.
This may happen after a move, adoption, transfer or second registration. One record may be current while another still contains old details.
When several records appear:
- Contact the most recent registry first
- Check whether the owner’s details are current
- Ask whether older records can be updated or closed
- Keep both records in mind until the correct one is confirmed
The chip may only lead back to the manufacturer
When no registry record is found, the chip number may still identify the manufacturer, supplier or distributor.
That information can help trace:
- Which clinic or rescue bought the chip
- Which country or region received the batch
- Which registry was normally used
- Who implanted the chip
AAHA explains that when no participating registry holds a record, a lookup may return the manufacturer or distributor instead.
What should I do next?
Follow these steps in order:
- Check the number again. Make sure every digit is correct.
- Search with ChipTrace. It checks connected registries and lookup services.
- Review the databases checked. Note any that were unavailable or could not be searched automatically.
- Use the manufacturer information. Contact the supplier when ChipTrace identifies one.
- Contact the implanting organisation. Ask the vet, breeder, shelter or rescue whether they still have a record.
- Try the likely national registry. Some registries require a direct enquiry.
- Register or update the chip. Do this only when you have the authority to act for the animal.
Do not replace a working chip too quickly
A missing registration does not mean the physical chip needs to be removed or replaced.
When the chip scans correctly, the existing number can often be registered or updated.
Before implanting another chip, ask a vet to scan the whole animal carefully and check whether the first chip still works.
Check the microchip with ChipTrace
Enter the number in ChipTrace to search connected registries and lookup services.
When no registration is found, ChipTrace may still provide:
- The likely country
- The manufacturer or distributor
- The number range
- Databases that could not be checked automatically
- The next organisation to contact