If you are already a pet owner or are still toying with the idea of getting a four-legged friend, you must always bear one important point in mind: your animal should be identified (colloquially also “chipped”) and registered. This also applies if there is no labeling requirement in the federal state in which you live. By chipping and registering, your animal can be clearly assigned to you and you can identify yourself as the legal owner. At the latest when you want to travel with your four-legged friend within the EU, must the animal must be marked with a microchip.
A transponder (colloquially also “chip”) carries a globally unique 15-digit identification number and is about the size of a grain of rice. The first 3 digits of the identification number form the country code, i.e. they indicate the country from which the animal comes. The fourth digit is usually a 0 followed by the next 3 digits indicating the manufacturer of the chip.
The rest of the sequence of numbers is a unique number. If your animal’s chip number begins with a number that is greater than or equal to 900, it is purely a manufacturer ID and it is not possible to allocate your animal to a country.
The transponder works without a battery and is a passive element. It only becomes active for the moment when the microchip is scanned using a special reader. At that moment, he transmits the number to the device.
List of European country codes (excerpt)
Country Chip No. CountryChip No. Country008Albania040Austria056Belgium070Bosnia & Herzegovina100Bulgaria112Belarus191Croatia203Czech Republic208Denmark233Estonia234Faroe Islands246Finland249France276Germany300Greece336Vatican City348Un garn352Iceland372Ireland380Italy428Latvia438Liechtenstein440Lithuania442Luxembourg470Malta492Monaco498Republic of Moldova499Montenegro528Netherlands578Norway616Poland620Portugal688Serbia703Slovakia705Slovenia724Spain752Swed en756Switzerland804Ukraine826Great Britain & Northern Ireland
Source: https://notpfote/informationen-rund-um-den-legalen-sauberen-tierschutz/laendercodes-der-chipzahlen/
The vet injects it under the skin using a syringe designed for this purpose, this is usually done on the left side of the neck. This procedure is minimally invasive and can usually be performed without anesthesia.