+407 typically denotes a [Proxy Authentication](/wiki/Proxy_Auth) Required status within [HTTP Status](/wiki/HTTP_Status) codes, indicating that a client must authenticate itself to a proxy server to gain access. Beyond this digital signal, 407 also exists as an integer, a unique point in the endless sequence of numbers.
+## See also
+- [Number](/wiki/Number)
+- [Internet](/wiki/Internet)
+- [Web Protocol](/wiki/Web_Protocol)
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