Netlify DNS returns non-Netlify IPs, Let's Encrypt provisioning fails (loraclass.kr)

Subject: Netlify DNS returns non-Netlify IPs, Let’s Encrypt provisioning fails (loraclass.kr)

Site: loraclass.netlify.app
Custom domain: loraclass.kr, www.loraclass.kr

Problem:
“Provision certificate” fails with “We could not provision a
Let’s Encrypt certificate for your custom domain”,
even though “DNS verification was successful”.

What I verified:

  • Name servers at registrar (Gabia): dns1-4.p07.nsone.net, all four set
  • NS propagation confirmed globally via DNSChecker
  • Netlify DNS records: loraclass.kr and www.loraclass.kr → loraclass.netlify.app (NETLIFY)
  • CAA records: none
  • DNSSEC: disabled
  • Domain added to Netlify on Aug 17

The issue:
An A lookup for loraclass.kr via DNSChecker returns non-Netlify IPs
(98.84.224.111, 18.208.88.157, 35.157.26.135, 63.176.8.218),
varying by region. It never returns 75.2.60.5.
So Let’s Encrypt validation hits a server that isn’t Netlify.

A duplicate site was accidentally created and deleted today.
Could the DNS zone state be stuck from that?
Please reset the certificate provisioning state for this domain.