[Fiction question] How are electrical service and telephone land lines provided in unincorporated areas in the U.S.?

If an older house were situated somewhat remotely, outside the town boundaries, would electrical and telephone service come from above-ground utility poles, or would they use underground lines? I’m assuming those services would still be available. The house is half a mile down a private dirt road off the main road that passes through the nearest village.

Is there any requirement that electrical service be provided? What if the house had never been upgraded from kerosene-lantern days? Any law against that?