HTTP Status

HTTP status ranges in a nutshell (src):

• 1xx: hold on;
• 2xx: here you go;
• 3xx: go away;
• 4xx: you fucked up;
• 5xx: I fucked up.

Fun status codes:

• HTTP Cats;
• HTTP STATUS DOGS;

With description and RFC references:

• HTTP Status Codes and with examples in different languages.
• REST API Tutorial has more codes;
• Mozilla with browser compatibility matrix.