ESID Lookup by Address
Search and locate your ESID (also commonly styled as ESI-ID or ESI ID) by address using our free ERCOT ESID lookup tool. Enter the address of your Texas home or business to find your ESID. You can also search using an existing ESID to find its address.
Find Your ESID by Address
Enter your Texas service address below to instantly look up your Electric Service Identifier (ESI-ID).
Validate Your ESID
Already have an ESI-ID number? Paste it below to verify it is valid and see which utility territory it belongs to.
What is an ESID (ESI-ID)?
An ESID — also written as ESI-ID, ESI ID, or ESIID — stands for Electric Service Identifier. It is a unique 17-22 digit number assigned by ERCOT (the Electric Reliability Council of Texas) to every electricity meter location in the deregulated Texas electricity market.
Think of it as a permanent address ID for your electrical service. It identifies exactly where electricity is delivered, regardless of which retail electric provider (REP) you choose. Every home, apartment, and business in deregulated Texas has an ESID. This number never changes for your address — even when you switch providers, change your name, or update your account. The ESID stays with the physical location permanently.
When you sign up for electricity service or switch providers in Texas, your new provider uses your ESID to ensure the switch happens at the correct location. Without the right ESID, your switch could be delayed or applied to the wrong address.
Why Do You Need Your ESID Number?
Your ESID is required any time electricity service is set up, changed, or verified at your address. Here are the most common situations where you'll need it:
- Switching electricity providers — Your new REP uses your ESID to process the switch at the correct meter.
- Starting new service — Moving into a new home or opening a business in Texas requires your ESID to activate service.
- Reporting a power outage — Your utility company (TDU) can locate your meter faster with your ESID.
- Verifying your billing — Confirm that your electricity bill matches the correct service address and meter.
- Smart Meter Texas registration — Setting up a Smart Meter Texas account requires your ESID as a security identifier.
What Does the ESID Number Mean?
An ESID is a 17 or 22 digit number. The structure breaks down as follows:
- First 7 digits (TDU prefix) — Identify which Transmission and Distribution Utility delivers electricity to your address. For example, 1008901 = CenterPoint Energy (Houston) and 1017699 = Oncor (Dallas/Fort Worth).
- Remaining digits — Uniquely identify your specific meter location within that utility territory. No two addresses share the same ESID.
The ESID is not the same as your meter number. Your meter number is a serial number printed on the physical device and changes if your meter is replaced. Your ESID is tied to the address, not the hardware, and stays the same permanently. The ESID also does not appear on your physical meter — you'll find it on your electricity bill or by using our free ERCOT ESID lookup tool above.
Commercial ESID Lookup
Our ESID lookup tool works for both residential and commercial meters. Enter your business address above to find your commercial ESID, see which utility territory you're in, and confirm your meter type.
If you're setting up new commercial electricity service in Texas, your retail electric provider will need your ESID to process enrollment. For new commercial construction, the ESID won't be available until the local utility completes the meter set — this typically takes 24 hours after activation to appear in the ERCOT database.
Commercial properties with multiple tenant spaces often have multiple ESIDs — one for each separately metered unit. Use our lookup tool to see all ESIDs associated with your business address.
ESID Prefix by Utility (TDU)
The first 7 digits of your ESID identify which utility delivers electricity to your address. All Texas ESIDs are assigned through ERCOT and begin with "10".
Frequently Asked Questions
Common questions about ESI-IDs answered
What is an ESI-ID and why do I need it?
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.
Where can I find my ESI-ID number?
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.
Is an ESI-ID the same as a meter number?
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.
What do the numbers in my ESI-ID mean?
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.
Does my ESI-ID change when I move?
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.
Can I have multiple ESI-IDs at one property?
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.
How can I find my Oncor ESID?
Use our free ESID lookup tool above to search by your Dallas/Fort Worth area address. Oncor ESI-IDs begin with the prefix 1017699. You can also find your Oncor ESID on your electricity bill or by contacting Oncor directly. Our tool searches the ERCOT database so results are always current.
How can I find my CenterPoint ESID?
Enter your Houston-area address in our ESID lookup tool above to instantly find your CenterPoint ESI-ID. CenterPoint ESI-IDs begin with the prefix 1008901. You can also locate it on your electricity bill — look for a 17-22 digit number starting with 10089.
How can I find my AEP Texas ESID?
Search your South or West Texas address using our ESID lookup tool above. AEP Texas Central ESI-IDs begin with 1003278 and AEP Texas North ESI-IDs begin with 1020404. You can also find your AEP ESID on your monthly electricity bill.
How can I find my TNMP ESID?
Enter your address in the ESID lookup tool above to find your Texas-New Mexico Power (TNMP) ESI-ID. TNMP ESI-IDs begin with the prefix 1040051. TNMP serves various areas across Texas and your ESID can also be found on your electricity bill.
The ESID lookup didn't find my address. What should I do?
If the lookup returns no results, your address may be new construction. New meters must be assigned an ESID by the local utility company after the builder requests a meter set. The ESID typically appears in the ERCOT database within 24 hours of activation. Your address may also be in a non-deregulated area of Texas.
The ESID lookup says my meter is inactive. What does that mean?
An inactive meter status means the utility company has retired or disconnected that ESID. This can happen when meters are replaced or service is permanently discontinued. Contact your local utility (TDU) to have a new ESID assigned or to reactivate service at that location.
Where is the ESID number on my meter?
The ESID number does not appear on your physical meter. The number printed on your meter is the meter number, which is different from the ESID. To find your ESID, check your electricity bill, use our free lookup tool by entering your address, or contact your utility company.
Is the ESID lookup free?
Yes, our ESID lookup tool is completely free to use with no registration required. You can search for any residential or commercial ESID in Texas by entering an address. The tool queries the ERCOT database so results are always up to date.
