Oncor Electricity Service Area and Texas Delivery Guide

If your address is in Oncor’s Texas service territory, Oncor is the company that moves electricity through the local wires and meter. It is usually not the company selling you the retail electricity plan. That distinction matters because a household can change Retail Electric Providers while Oncor remains the transmission and distribution utility assigned to the location.

This guide focuses on the Oncor service area itself: where the utility operates, how to verify an address, which responsibilities stay with Oncor, and which choices belong to the retail provider. If you are comparing offers, start with the broader Texas electricity rates guide, then use the service address to confirm that Oncor is actually the local delivery company.

What Oncor does in the Texas electricity market

Oncor Electric Delivery is a transmission and distribution utility, often shortened to TDU or TDSP. Its job is the physical delivery side of electric service: maintaining the local distribution network, operating meters, restoring distribution outages and carrying electricity from the grid to homes and businesses in its certified territory.

Oncor is different from a Retail Electric Provider, or REP. In competitive parts of Texas, the REP sells the electricity plan, sets the retail contract terms and sends the customer bill. Oncor’s own consumer information states that it does not generate power or bill residential customers directly for the retail plan. Delivery charges are assessed through the competitive retail structure and normally appear on the bill issued by the REP.

Where Oncor operates in Texas

Oncor describes a large but non-contiguous service footprint covering parts of West, Central and East Texas. Its official area information says the territory spans nearly one-third of the state, includes more than 400 communities and reaches 98 counties. Large portions of the Dallas-Fort Worth region are within the footprint, and Oncor also serves communities well beyond North Texas.

Those broad descriptions are useful for orientation, not for address-level eligibility. Utility boundaries can cut across a city, ZIP code or metro area. A familiar city name therefore should never be used as the only evidence that a property is served by Oncor.

Dallas-Fort Worth is important Oncor territory, but not a blanket rule

Dallas, Fort Worth, Arlington and many surrounding communities are strongly associated with Oncor because the utility serves major parts of the Dallas-Fort Worth metroplex. The PUCT-approved Oncor tariff also lists numerous cities in the certified service area. Even so, a city-level statement is not precise enough for every property.

For example, municipal utilities and other delivery territories can exist near or within the same broader region. Someone researching Dallas electricity rates or Fort Worth electricity rates should still verify the exact service address before assuming Oncor delivery charges or Oncor outage responsibility apply.

Central, West and East Texas coverage needs address verification

Oncor’s own service-area material also references the Austin-Round Rock metropolitan area and communities across Central, West and East Texas. That does not mean the entire Austin market is an Oncor market. Austin Energy, for example, operates a municipal service territory, and other utilities serve their own defined areas.

The practical rule is simple: treat metro names as geographic clues and the service address as the deciding input. This is especially important when a comparison page covers a large city, a fast-growing suburb or a ZIP code near a utility boundary.

How to check whether an address is served by Oncor

Oncor provides an official Service Territory Lookup for this exact purpose. The tool can check a Texas location using a street address and ZIP code, an ESI ID, or geographic coordinates. An ESI ID is the unique identifier tied to an electric service point in the Texas retail market and can be especially useful when a street address is ambiguous.

For shopping, the address check should happen before plan filtering. Once Oncor is confirmed as the TDU, a comparison can use the correct delivery territory and avoid showing products that do not serve the meter. ZIP code remains a useful first filter, but the full address is the stronger final check.

Oncor versus your Retail Electric Provider

In an Oncor retail-choice area, the two companies on the customer journey have different jobs. Oncor operates the delivery network. The REP owns the commercial relationship for the electricity plan. The REP can change when a customer switches plans; Oncor normally does not change unless the customer moves to a different utility territory.

This separation is central to Texas energy choice. It also explains why a comparison should not rank REPs as though they control local grid reliability. Retail plans can differ in price structure, contract length, renewable content, customer service and billing terms, while the same Oncor wires continue serving the address.

Who handles outages, meters and physical delivery issues?

For a distribution outage or a problem involving the local delivery network, Oncor is the relevant utility for addresses in its territory. Oncor operates an outage map, outage reporting channels and service-request resources. A switch from one REP to another does not transfer outage restoration to the new seller.

Meter work, line work and many physical service changes also involve the TDU. The REP can submit or coordinate market transactions, but the physical work remains tied to the utility system. This is why identifying the correct TDU is useful even when the consumer’s main goal is simply to compare electricity prices.

How Oncor delivery charges fit into the electric bill

Oncor operates under a PUCT-approved tariff for retail delivery service. Delivery charges compensate the utility for using and maintaining the transmission and distribution system and for authorized services. The exact tariff components can change through regulatory proceedings, so a current plan comparison should not hard-code an old Oncor delivery rate into a long-term estimate.

Instead, use the delivery treatment shown in the current plan documents and bill calculation. The Electricity Facts Label is particularly important because it shows the pricing structure for a specific retail offer. A low REP energy charge can still produce a different total bill once delivery charges, base fees, credits and usage rules are included.

Switching electricity plans does not switch Oncor

If an eligible Oncor customer changes from one REP to another, the local poles, wires and meter do not move to a competing network. The customer is changing the retail contract, not selecting a new TDU. This is why switching can be commercially significant without changing who restores a neighborhood outage.

Before changing providers, review the current agreement, termination conditions and expected start date of the replacement plan. The dedicated guide to switching electricity providers in Texas covers that retail process in more detail.

Moving into or out of Oncor territory

A move is different from an ordinary REP switch because the destination address may be served by a different utility. Someone moving from one Oncor address to another can remain in the same delivery territory, but a move across a service boundary can change the TDU automatically.

Confirm the destination before comparing plans. If an existing meter is already installed, the retail enrollment and move-in transaction can be matched to the service point. For a new build or a location requiring construction changes, additional utility-side work may be required before ordinary retail service can begin.

Solar, EV charging and smart-meter data in Oncor territory

Solar panels and electric vehicles do not remove the need to understand the delivery territory. A home with rooftop solar can still import electricity through the Oncor network, and an EV can materially increase household kWh. Those changes affect which retail plan structure fits the home even though Oncor remains the local delivery utility.

Advanced-meter usage data can make the comparison more precise, especially for time-of-use plans. Oncor directs customers and authorized parties to Texas market resources for detailed usage information where applicable. Interval data can show whether overnight EV charging, daytime solar production or heavy evening air-conditioning aligns with a plan’s time windows.

How to compare electricity plans at an Oncor address

Start with three verified inputs: the exact service address, the correct TDU and the household’s real usage history. If Oncor is confirmed, keep Oncor delivery assumptions consistent across every REP offer being compared. Then evaluate the variables the retail provider actually controls.

Compare the energy charge, recurring fees, bill-credit thresholds, time-of-use rules, contract term, renewable content and cancellation provisions. Model several real usage months instead of relying on one advertised 1,000-kWh example. A plan that looks cheapest at one benchmark can become expensive when the home’s consumption moves above or below a credit threshold.

Finally, verify the current EFL and Terms of Service for the exact offer before enrollment. The Oncor service area determines the delivery context, but the retail documents determine the commercial deal.

Frequently asked questions about the Oncor service area