What to Check Before Blaming the Application

When a site fails to load or a new domain behaves strangely, it is tempting to start with the application. But many launch problems begin outside the app: DNS records, certificate coverage, redirects, cache behavior, or a typo in a hostname. A better habit is to separate infrastructure checks from application checks. Start with the domain. Does it resolve to the expected host? Are the right records visible? Has propagation reached the location you are testing from? A browser-based DNS lookup too