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What is an ESID?
ESID — pronounced “Easy I.D.” — stands for Electric Service Identifier. ESIDs are unique numbers assigned to every home and business in the state of Texas. ESID numbers (also referred to as ESIID or ESI-ID) identifies your “electric service location.” Think of it like a social security number for homes and businesses for power companies to use.
ESI-ID numbers are typically 17-digits long and start with a 10-digit TDSP (utility) prefix:
- 1008901000 – CenterPoint Energy (Houston area)
- 1017699000 – Oncor (Dallas/Fort Worth and surrounding areas)
- 1044372000 – AEP Texas Central (South Texas)
- 1003278900 – Texas-New Mexico Power (some Gulf Coast areas and DFW suburbs)
The last 7 digits are unique to the service location, though some addresses — like apartment complexes or shopping centers — can have multiple ESI IDs due to each apartment, store, etc having its own ESI ID.
What does an ESI ID number do?
These unique numbers allow energy companies to identity customer accounts and track energy usage. When you signup with a new electric provider or utility, you’ll be asked to provide your Electric Service Identifier (ESI ID) to verify your identity and to complete the signup process.
How do I lookup my ESID?
You can use our free search tool to locate and look up your ESI ID — just search for your address and you’ll find your ESID. Also, energy providers typically have your ESI-ID number on your monthly bill, typically toward the top of it.
How do I get issued an ESID?
In Texas, ESI ID numbers are automatically created and assigned by the Public Utilities Commission of Texas (PUCT). If you have a home or business connected to the power grid (ie, you have electricity), you already have an ESID. If you’re moving to a new home or business, you’ll automatically be issued a new ESI-ID once you sign up for power at your new location.