Wow, but I wonder if there's more to it.
I've not been able to access web.archive.org from my work computer - I always get the 429 error.
But I then pull out my phone and can access it just fine. All along I was assuming my company was blocking it. Still weird that it happens every time from my work PC and never from my home one.
Your workplace is probably redirecting traffic through a datacenter IP range. Especially if they have their own datacenters like google, microsoft, oracle, amazon, etc.
Try making a vpn via digital ocean for example and you'll see similar patterns.
Could be due to some scrapers from either your work ISP block, or the larger block which lends IPs to multiple workplaces.
I assume that's because the IP range of your company network overlaps with a range used by some scrapers, and if it doesn't happen on your phone even in the corporate network, then IA probably checks some extra signals like the user agent in addition to the IP