What the codes your server returns mean and when each one is correct.
Every response from a web server starts with a three-digit status code. Learn what the five classes mean, which codes matter most for website owners, and how they affect visitors, monitoring and search engines.
What the codes your server returns mean and when each one is correct. Each guide is written by the UptimeStats editorial team to answer one practical question, with examples you can apply to your own website and links to primary sources such as RFCs and official documentation where they help.
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