Is the speed limit 80 mph anywhere in the US?

Excuse me, could you please clarify something for me? I've been wondering, does the speed limit of 80 miles per hour apply anywhere within the United States? I've heard conflicting information on this topic and I'm curious to know if there are indeed any roadways or highways in the country where this speed limit is officially enforced. If so, could you provide me with some specific examples or regions where this might be the case? I'd appreciate any insights you could offer on this matter.