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How to Find Your ESI ID (Electric Service Identifier) in Texas

July 10, 2026Get Electricity StaffElectricity Guide

How to Find Your ESI ID (Electric Service Identifier) in Texas

When shopping for a new electricity plan in Texas, you will quickly run into a request for your ESI ID (Electric Service Identifier).

Unlike other states where setting up power is tied solely to your name and address, the deregulated Texas market tracks electricity connection points using a unique identifier. Without this number, your switch to a new provider cannot be processed.

But what exactly is an ESI ID, where do you find it, and what should you do if your address has multiple ESI IDs listed?

In this guide, we break down everything you need to know to locate your ESI ID and ensure a seamless transition to your new electric plan.

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What is an ESI ID?

Think of your ESI ID as the social security number or GPS coordinates for your physical electricity meter.

  • Your Address: Identifies where you live.
  • Your Account Number: Identifies your relationship with your retail provider.
  • Your ESI ID: Identifies the physical connection point where the utility lines attach to your property.

Even if you switch retail electric providers (REPs) five times in five years, or if the name on the account changes, the ESI ID for your property stays exactly the same. It is a permanent record managed by the Electric Reliability Council of Texas (ERCOT) and your local Transmission and Distribution Utility (TDU).

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1. How is a Texas ESI ID Structured?

A Texas ESI ID is a 17-digit or 22-digit number that always starts with the prefix 10.

The prefix following the initial "10" tells you which local utility company (TDU) owns and maintains the physical lines in your area:

  • 1043828... $\rightarrow$ Oncor Electric Delivery (Dallas/Fort Worth and surrounding areas)
  • 1008901... $\rightarrow$ CenterPoint Energy (Houston and surrounding areas)
  • 1020404... or 108409... $\rightarrow$ AEP Texas (South and West Texas)
  • 1040051... $\rightarrow$ TNMP / Texas-New Mexico Power (Various regions across Texas)

Knowing your local utility is helpful because they are the entity responsible for restoring power during an outage, regardless of which company sends you your monthly bill.

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2. Three Easy Ways to Find Your ESI ID

If you are signing up for a new plan or transferring service, here are the easiest ways to locate your ESI ID:

Method A: Look at a Past Electric Bill (Easiest)

If you are already living at the property and have access to a past electric bill, your ESI ID will be printed on it.

Typically, it is located on the first or second page near your service address, account number, or in the detailed line-item breakdown of your charges. Look for a label that says "ESI ID," "Service Identifier," or a number starting with 10 that is 17 to 22 digits long.

Method B: Use GetElectricity's Instant Address Search

If you are moving into a new home or don't have a past bill handy, you can look it up instantly using our portal:

1. Go to the GetElectricity shopping page.

2. Enter your physical address.

3. Our platform queries the official ERCOT database in real-time to retrieve your active ESI ID and matching utility service.

Method C: Check Your Lease or Closing Documents

If you are renting a new apartment or buying a home, the ESI ID is frequently listed in your lease agreement utility addendum or your home closing disclosure. Property managers and landlords in Texas keep this number on file to facilitate quick resident transitions.

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3. Common ESI ID Issues and Solutions

Sometimes, looking up or registering an ESI ID can run into complications. Here is how to handle the most common issues:

Issue 1: "Address Not Found" or New Construction

If you are moving into a newly built home, your physical address might not be registered in the ERCOT database yet.

  • Solution: You must contact your local utility company (like Oncor or CenterPoint) directly to request that they create and register a new ESI ID for the premise. Once the TDU assigns the number, it will propagate to ERCOT, allowing you to sign up for a retail plan.

Issue 2: Multiple ESI IDs for a Single Address

If you live in a duplex, apartment complex, or a property with an active guest house, searching your address may display multiple ESI IDs.

  • Solution: Do not guess. Check the serial number on your physical electric meter box (usually located on the side of the building). You can call your utility or provider and match your physical meter serial number to the correct ESI ID to make sure you do not accidentally pay for your neighbor's power.

Issue 3: Switch Holds

If a previous tenant left an outstanding balance or if there was suspected meter tampering, the utility may place a "switch hold" on the ESI ID.

  • Solution: To remove the hold and start service, you will need to provide your new REP with proof of occupancy (such as a signed lease or settlement statement) demonstrating that you are a new occupant unrelated to the previous account holder.

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Find Your ESI ID and Start Saving Today

Locating your ESI ID is the key that unlocks deregulated energy savings in Texas. Once you have your identifier, you can compare transparent, gimmick-free plans customized to your usage.

Locate your ESI ID and shop the best rates on GetElectricity today.