Railway-provided .up.railway.app domains need no DNS configuration and are served by wildcard DNS, so there's no per-service record for us to refresh manually. When we checked just now, that domain resolved to our edge and the app answered normally. If it still won't load on a particular network, the cause is that network's DNS resolver, such as filtering or a stale cache. Try switching to a public resolver like 1.1.1.1 or 8.8.8.8, flush the local DNS cache, or test from a different network such as mobile data.