[proactivesvcs]

I'm not convinced these are "cursed". They may be the result of bygone networking conventions, implementation ideas that never came to mainstream fruition, flexibility for use-cases etc. Just because we don't understand something that looks strange, doesn't mean it's cursed, nor that one can simply turn one's nose up and say "I don't understand why these exist so I'll just ignore them when I implement x".

[dave_universetf]

I can help here: these definitely aren't cursed, because curses aren't real. I was exagerating for comic effect, because this was just a twitter rant that got out of control :)

That said, many of those representations no longer make sense in the modern world, and I'm actively choosing to not support them. That doesn't mean I don't understand why they came about in the first place, au contraire! I'm explicitly deciding that their historical reason for existing no longer applies.

[proactivesvcs]

Thank you for the clarification, it does sound like you've done more background research than the linked blog entry may explain. Was this the result of simply reading the RFCs or did you come across other resources that expand on the obsolete IP address representations?

[paledot]

I do think "curse" is a valid technical term, but to me a cursed IP address (or number, or edge case, etc.) is one that behaves significantly differently from other addresses for no self-evident reason. None of these examples are cursed, but 127.0.0.1 is definitely cursed.

[AmericanChopper]

The bygone implementers clearly cursed us with their peculiar decision making. Just as we occasionally curse the implementers of the future (either knowingly or unknowingly) with our peculiar decision making.

[mirthflat83]

He’s joking with that word choice.

[proactivesvcs]

Yes. I do understand the modern-day usage of the word "cursed" in this context :-)

[secondcoming]

Well, adding support for hex or octal IP addresses was a bit much with hindsight!

[Dylan16807]

Refusing to implement them is probably more good than bad for most of these.