Quick guide
A 60-second walkthrough showing exactly where the CUPS code lives on your Spanish electricity bill and how to find out who your distributor is.
Your CUPS is your meter's ID. It starts with ES, has 20 or 22 characters, and never changes when you switch provider.
Two different companies are involved in your electricity. Your provider (comercializadora) is who you pay — and who you can switch anytime. Your distributor (distribuidora) owns the cables and meter, and is fixed by where you live. You can't choose it, and it never changes — not even when you switch provider.
Not sure what it looks like?
CUPS
ES0021000001234567AB0F
Look for a line starting with ES, 20–22 characters long. That's your CUPS.
Example only — not a real CUPS code.
CUPS is a unique identifier for your meter point. It always starts with "ES" and has 20 or 22 characters (ES + 18 digits + 2 letters, sometimes 2 more). Every meter has its own CUPS — it's what tells the grid which supply point you're talking about.
Two companies are involved in your electricity. Your provider (comercializadora) is who sends your bill and who you can switch anytime. Your distributor (distribuidora) owns the cables and meter and is fixed by where you live — you can't choose it or change it. When the power goes out, you call the distributor, not your provider. And when you switch to a cheaper provider, your distributor stays exactly the same — nothing physical changes.
It's usually printed near your contract or supply information. Here's exactly where each major provider hides it.
Endesa
Page 2, under INFORMACIÓN DEL CONTRATO (Contract Information).
Holaluz
Page 3, under DATOS DEL SUMINISTRO (Supply Details).
Iberdrola
Page 2, under INFORMACIÓN ADICIONAL (Additional Information).
Naturgy
Page 2, under DATOS DE LA INSTALACIÓN ELÉCTRICA (Electricity Installation Details).
Repsol
Page 1, under DATOS DEL CLIENTE Y PUNTO DE SUMINISTRO (Customer and Supply Point Details).
Don't see your provider? Look anywhere near your contract or supply details. The CUPS always starts with "ES" and has 20 or 22 characters (ES + 18 digits + 2 letters, sometimes 2 more). If you can't find it, your provider's customer service can give it to you. Tip: Open the invoice and use your search function (Windows: Ctrl + f, Macbook: command + f) to search for "ES" - that was you can easily find the CUPS-code without going through the whole document.
No. Your contract number changes when you switch provider, but your CUPS never changes. Copying the contract number by mistake will make a switch bounce.
No. The CUPS is assigned by your distributor and stays the same no matter how many times you change provider. Only who you pay changes.
Yes, but only the distributor for your area can give it to you. They'll ask for the account holder's name, DNI, and the exact supply address — there's no public tool to look it up by address alone.
Each property has one CUPS for electricity and a separate one for gas. They are different codes.
No. Both lengths are valid. The last two characters identify the border or measurement point, and not every distributor prints them.
The distributor. Outages, meter faults and supply-quality problems are the distributor's responsibility, not the company that bills you.
Upload it and we'll pull analyse your current bill, free of charge and with your private data secured.
