Does Southern Federal Power Serve My AEP Texas North ZIP Code? Southern Federal Power offers residential electricity plans in many West Texas ZIP codes served by the AEP Texas North Division. To check your location, visit SouthernFederal.com, enter the ZIP code for your service address and review the plans currently available. A matching ZIP code is only a starting point. Utility boundaries do not always follow ZIP-code or city boundaries. Your complete service address provides the final confirmation that AEP Texas North serves the location. What Is the AEP Texas North Service Area? AEP Texas is a regulated Transmission and Distribution Utility, commonly [...]