@pythonanywhere posted on X 20h ago (2026-03-24 15:40Z) that their domain had expired and they immediately renewed. Unfortunately in that short period the domain was technically up for grabs and so NameCheap jumped onto it. Some nameservers still show that the SOA is dns101.registrar-servers.com. hostmaster.parklogic.com. All the public DNS servers I have tried resolve to the correct PA sites.
Some other DNS servers still have the stale parked domain resolution. That includes the one I'm currently connected to (EE mobile in the UK). I cannot see my site nor blog.pythonanywhere.com though www.pythonanywhere.com is working.
AFAIK we can do little but wait for the DNS changes to propagate. Admins of the downstream servers can pull changes manually but I think that there is no way to push from upstream.
Clients can work around this if they use a different DNS server. That is a big ask especially for customers of businesses hosting on PA.