ZIP 75089 is in Dallas County and Rockwall County, where EIA-861 records Oncor and TNMP beside 4 utilities whose customers cannot choose a retailer; the delivery utility on your bill decides which applies. Cheapest at 500 kWh: Oncor: Companion Energy Companion Pro + Perks 3 at 10.5¢/kWh; TNMP: Express Energy Speedy 12 at 12.3¢/kWh, as listed on Power to Choose on 2026-11-14.
OpenStream is not yet registered as a broker with the PUCT and earns nothing from any retailer. How we are paid.
Counties from the Census 2020 ZCTA-to-county file (largest land share first); utilities from EIA-861 2024 Service Territory, both read 2026-11-06.
The Census records Rowlett, Garland in ZIP 75089, in Dallas County and Rockwall County.
Which counties it is in and which delivery utilities serve them.