451 is kind of a novelty code, its meaning being related to Bradbury's "Fahrenheit 451" SciFi novel.
Oh! You'll love this: 418 I'm a teapot
https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/...
Oh! You'll love this: 418 I'm a teapot
https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/...