What is a KAEK and how to read it
The KAEK (Κωδικός Αριθμός Εθνικού Κτηματολογίου — National Cadastre Code Number) is the unique code under which every land parcel is registered in the Hellenic Cadastre. What a tax number is to a taxpayer, the KAEK is to a property: you find it on contracts, on the E9 tax form, on cadastral extracts and in every transaction involving the property.
How the 12-digit KAEK is read
The 12 digits are not random — they encode the parcel's geographic location:
| Digits | Meaning | Example (050616219024) |
|---|---|---|
| 1–2 | Prefecture | 05 → Attica |
| 3–5 | OTA (pre-Kapodistrian municipality/community) | 061 → Kalyvia Thorikou |
| 6–7 | Cadastral sector | 62 |
| 8–9 | Cadastral section | 19 |
| 10–12 | Parcel number within the section | 024 |
050616219024 —
see this specific parcel on the map →
KAEK extensions
For divided properties (apartments, vertical properties), the parcel's 12-digit code is extended with extra digits that identify the horizontal or vertical property. Special areas such as roads and streams have a KAEK containing the letters “ΕΚ” — see the special categories.
Don't know your KAEK?
Open the kaek.app map, locate the property and click on it — you will immediately see the KAEK and the parcel details. More in the guide How to find a property's KAEK.