Does every Texas address have an ESI ID?

Only in the deregulated portion of the ERCOT market. Municipal utilities and cooperatives operate outside it and use their own account structures.

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Texas ESI ID

Find your ESI ID

Q: Do I need my ESI ID before I can get pricing?

Not to start. Options can be modeled from a recent utility bill. The ESI ID is required to execute a contract and is confirmed before signing.

Every electricity meter in the competitive Texas market has a unique ESI ID. Here is what it is, exactly where to find it on your bill, and how to have an advisor confirm it for you.

Have us confirm it → Upload Utility Bill

What an ESI ID actually is

ESI ID stands for Electric Service Identifier — often written ESID or ESIID. It is a unique number, typically 17 to 22 digits, that identifies one physical meter at one physical address in the deregulated Texas market operated by ERCOT.

It matters because the ESI ID, not your address, is what actually gets switched. Contracts, enrollments, and switches are executed against it. A multi-tenant building or a campus can carry dozens of ESI IDs, and two suites at the same street address are entirely separate accounts. Getting it wrong is one of the most common causes of a failed or delayed switch.

It stays with the meter, not with you. If you move, the ESI ID stays behind at that service location.

Fastest method

It is already on your bill

Every Texas utility prints the ESI ID on the invoice. It is the most reliable source — it comes straight from the utility of record.

Oncor

Listed as ESI ID in the service or account detail section, usually near the meter number.

CenterPoint

Shown as ESI ID in the delivery charges detail, often on the second page.

AEP Texas

Printed as ESI ID near the service address and meter read detail.

TNMP

Appears as ESI ID in the account summary or delivery section.

On a retail bill

If you buy from a retail provider, it is usually near the account number or under service details.

No bill handy?

Your utility can confirm it by phone, or we can track it down for you below.

Have us confirm it

We will find and verify it for you

Send the service address and we will confirm the ESI ID, the serving utility, and the load zone — then tell you exactly what it means for your options. No obligation.

FAQ

ESI ID questions

No. The meter number identifies the physical device, which can be swapped out. The ESI ID identifies the service point and stays constant through a meter change.

Each separately metered space has its own ESI ID. Multi-tenant buildings, campuses, and multi-site portfolios routinely have many — which is exactly why aggregating them correctly creates negotiating leverage.

Not to start. We can model options from a recent utility bill. The ESI ID is required to execute a contract, and we confirm it before anything is signed.

Only in the deregulated portion of the ERCOT market. Municipal utilities and co-ops operate outside it and use their own account structures. We confirm which applies to each of your locations.

Have the bill instead?

Skip the lookup entirely — upload a recent utility bill and we will pull the ESI ID, usage, and charges, then model your options.

Upload Utility Bill →Talk to an Advisor