When you come across a subdomain like p6-juejin.byteimg.com, the first question is usually whether it's safe to load resources from it. This particular address belongs to Juejin, a well-known Chinese developer community, and acts as an image CDN. That part is reassuring — the parent service is legitimate and has been around for years.
However, the real issue here isn't the domain itself but where it's hosted. The network provider (AS138915) appears on Spamhaus's ASN-DROP list, which means Spamhaus considers the entire network to be malicious. That doesn't automatically mean every file on this CDN is dangerous, but it does mean the infrastructure has a history of hosting bad actors. For a CDN run by a reputable platform, that's an unusual combination.
Also, the server still accepts outdated TLS 1.0/1.1 connections, which is sloppy but not a deal-breaker for a static resource server. The domain has been in the Wayback Machine since 2021, so it's not new. If you're a developer using Juejin's services, you're likely already loading assets from this subdomain without issue. But if you're considering integrating this CDN into your own project, the hosting network's reputation is worth investigating further. A cautious approach is wise until Juejin clarifies their hosting choices.
