You can tell if a dog is microchipped by having a veterinarian or animal shelter pass a handheld scanner over the dog’s shoulder blades. The scan takes seconds and is usually free.
But finding a chip is only half the answer. A microchip that was never registered returns a number with no owner attached — the scan works, the number appears, and the trail stops there. Both halves matter, and most people only ever check the first one.
Can you feel a microchip in a dog?
Sometimes — but feeling nothing proves nothing.
A pet microchip is about the size of a grain of rice, roughly 12mm long, implanted under the skin between the shoulder blades. In a thin, short-coated dog you can occasionally feel it as a tiny firm grain if you roll the loose skin gently between finger and thumb.
In most dogs you cannot. Coat, body condition and the chip’s position all hide it, and chips migrate — drifting down a shoulder, along the chest, sometimes several inches from where they started. That is normal, it is not harmful, and it means the chip may simply not be where your fingers are.
Never conclude a dog is not chipped because you cannot feel one. The only reliable answer comes from a scanner.
Where to get a dog scanned
Any of these will scan a dog, and most do it free:
- A veterinary clinic — no appointment usually needed for a scan
- An animal shelter or rescue
- Animal control
- Many pet stores and groomers with a scanner on site
The scanner is a handheld wand that emits a radio signal. The chip has no battery — it draws its power from that signal, which is why it never needs charging and never expires. If a chip is present, its unique number appears on the scanner screen.
Ask for a full scan, not a quick pass
Because chips migrate, a proper scan covers the whole body in an S-pattern, not just one pass between the shoulders. And because chips run on more than one frequency — 125 kHz, 128 kHz and 134.2 kHz — a scanner that does not read all of them can report “no chip” on a dog that has one.
If it matters, ask whether the scanner is universal. Not all of them are.
Can a phone read a dog’s microchip?
No. Phones cannot read pet microchips, and there is no app that can. Pet chips use a low-frequency RFID standard that phone hardware does not support. Any app claiming otherwise is not doing what it says.
More on why there is no scanner app
Checking paperwork instead
If the dog is yours and you are simply trying to remember, the number is often already written down:
- Adoption paperwork from a shelter or rescue
- The bill of sale or puppy pack from a breeder
- Vet invoices and records from the visit where it was implanted
- The original registration confirmation email
Some dogs also wear a collar tag stating they are microchipped, sometimes with the number on it. Treat that as a hint, not proof — collars get swapped and tags outlive the information on them.
You have the number. Now check the part that matters.
A microchip number is not a record of ownership. It is a key to one. The chip stores a number and nothing else — no name, no address, no phone number. Everything useful lives in a registry, and only if somebody put it there.
This is the most common failure in the whole system. A dog is chipped at the shelter or the vet, the owner is handed a number, and the registration is either never completed or never updated after a move, a new phone, or a change of owner. The chip works perfectly. It leads nowhere.
Where to register, and why it costs something
Registering is not free, and that is the point. Most legitimate registries charge either a one-time or a modest annual fee. That fee pays for the thing you are actually buying: a record that is maintained, a database somebody keeps running, and a phone line that is answered at two in the morning when a shelter three states away scans your dog.
Register with the registry your pet’s microchip actually belongs to. Every chip carries a manufacturer prefix, and each manufacturer has an associated registry. A nominal fee is required. Registering there means that when a vet or shelter looks the number up through the standard tools, it resolves to you.
Be careful about where else you register. A record sitting in a database that scanning professionals do not check is not doing anything for your pet.
And where a registry is free, it is worth understanding how it is funded. Maintaining a database and answering a phone costs money. If that money is not coming from a registration fee, it is coming from somewhere else — and the thing you handed over was your contact information. Read the privacy policy before you enter it, and look specifically at what it says about sharing your details with third parties or affiliates.
Before you register anywhere, check two things: that the registry is searchable through the lookup tools shelters and clinics actually use, and that there is a real human at the end of the phone number on file.
Look the number up and find out. A lookup will tell you whether the chip is registered, and to which registry.
- Look up a microchip number
- What a microchip does, and what it cannot do
- Transfer a chip that is registered to a breeder or shelter
- Where microchips are placed, and how they work
Register your dog’s microchip with Peeva
Common questions
How do I know if my dog is microchipped?
Have a vet or shelter scan the dog. The scan takes seconds, is usually free, and is the only reliable way to know.
Can you feel a dog’s microchip?
Sometimes, as a small firm grain between the shoulder blades — but many chipped dogs have no detectable lump, and chips migrate. Not feeling one does not mean there is no chip.
What does “chipped” mean for a dog?
It means a microchip — a passive RFID transponder about the size of a grain of rice — has been implanted under the skin. It carries one unique identification number that a scanner can read. It is identification, not tracking.
Does a microchip track my dog?
No. A microchip has no battery and no GPS. It cannot report a location and only responds when a scanner is held within a few inches of it.
Is scanning free?
At most shelters and veterinary clinics, yes.
My dog is chipped. Is that enough?
Only if the chip is registered to you with current contact details. An unregistered chip returns a number with no owner attached.
Microchip resources
Find the registry by microchip prefix · Look up a microchip number · Universal microchip scanners · Register your pet’s microchip
