When you see edge-042.usatl5.icloud-content.com in your browser or logs, you're looking at a backend server that Apple uses to deliver iCloud content. It's not a website you're meant to browse directly. It's the kind of address that appears when your devices pull down a photo you stored in iCloud or load a shared file from an Apple service.
So is edge-042.usatl5.icloud-content.com a scam? No. The domain lives entirely inside Apple's network, uses Apple's own TLS certificate, and passes Google's security checks. There's no merchant here, no checkout page, no data collection form. The biggest limitation from a trust perspective is transparency: the site blocks automated crawlers, has no about page, and has zero history in the Wayback Machine. That's normal behavior for an internal infrastructure server, but it does mean there's no public record to cross-check.
If you're asking whether it's safe when your Mac or iPhone connects to this address, the answer is yes. Apple controls the entire chain from the server hardware to the certificate. For a consumer, this isn't a site you need to evaluate independently. It's a cog in the broader iCloud machine, and your trust in it should match your trust in Apple's cloud service overall.