Find your Electric Service Identifier (ESI-ID) instantly using our free lookup tool.

Key Takeaways

ESI-ID is a unique 17-22 digit identifier for your Texas service location
Required when switching providers or starting new electricity service
Find it on your electricity bill or use our free lookup tool
Format starts with your TDU prefix (first 7 digits identify your utility)
Different from your meter number (physical device serial)
Stays with your address permanently
17-22
Digits in ESI-ID
7
Texas TDU territories
100+
Providers in Texas
Free
Instant lookup

Find Your ESI-ID

Enter your Texas service address below to instantly look up your Electric Service Identifier.

Your ESI-ID Number
Multiple ESI-IDs found
Lowest Rate in Your Area
--
Loading...
View All Plans

Validate Your ESI-ID

Already have an ESI-ID? Paste it below to verify it is valid and see which utility territory it belongs to.

01

What is an ESI-ID?

Understanding your Electric Service Identifier

An ESI-ID (Electric Service Identifier) is a unique 17-22 digit number assigned to every electricity meter location in Texas. Think of it as a permanent address ID for your electrical service - it identifies exactly where electricity is delivered, regardless of which provider you use.

Every home, apartment, and business in the deregulated Texas electricity market has an ESI-ID. This number never changes for your address, even when you switch providers, change your name, or update your account. The ESI-ID stays with the physical location permanently.

When you sign up for electricity service or switch providers in Texas, your new provider uses your ESI-ID to ensure the switch happens at the correct location. Without the right ESI-ID, your switch could be delayed or applied to the wrong address.

02

ESI-ID Prefix by Utility (TDU)

The first 7 digits of your ESI-ID identify which utility serves your area

CenterPoint Energy

Houston area
1008901xxxxxxxxxx

Oncor

Dallas/Fort Worth
1017699xxxxxxxxxx

AEP Texas Central

South Texas
1003278xxxxxxxxxx

AEP Texas North

West Texas
1020404xxxxxxxxxx

Texas-New Mexico Power

Various areas
1040051xxxxxxxxxx

Lubbock Power & Light

Lubbock
1011292xxxxxxxxxx

Nueces Electric Coop

Corpus Christi area
1013830xxxxxxxxxx
03

Frequently Asked Questions

Common questions about ESI-IDs answered

An ESI-ID (Electric Service Identifier) is a unique 17-22 digit number that identifies your specific electricity meter location in Texas. You need it when switching electricity providers or starting new service - it ensures your switch is processed for the correct address.
You can find your ESI-ID in several places: on your electricity bill (look for a 17-22 digit number starting with 10), using our free lookup tool above by entering your address, or by contacting your utility company directly.
No, they are different. An ESI-ID identifies your service location (address), while a meter number identifies the physical meter device. If your meter is replaced, you get a new meter number, but your ESI-ID stays the same.
The first 7 digits identify which utility (TDU) serves your area: 1008901 = CenterPoint (Houston), 1017699 = Oncor (Dallas/Fort Worth), 1003278 = AEP Texas Central (South Texas), 1020404 = AEP Texas North (West Texas), 1040051 = TNMP, 1011292 = Lubbock Power & Light, 1013830 = Nueces Electric Coop. The remaining digits are unique to your meter location.
No, your ESI-ID does not follow you when you move. Each address has its own permanent ESI-ID. When you move to a new address in Texas, you will need to look up the ESI-ID for your new location.
Yes. Properties with multiple meters have multiple ESI-IDs. This is common for apartment complexes, commercial buildings with separate tenant meters, homes with guest houses, and properties with separate outdoor circuits.