What to run
Open Whois Lookup. The result is from Cloudflare. Whois is RDAP: registrar, statuses, dates, and nameservers.
How to read the result
ok or active is normal.
clientTransferProhibited only locks transfers.
clientHold and serverHold stop DNS.
pendingDelete and redemptionPeriod mean the name is leaving the zone.
What to open next
Open DNS Lookup. DNS Lookup is DNS-over-HTTPS from the browser and does not follow CNAMEs.
Hold plus NXDOMAIN agrees. Hold plus still resolving means a cache or a different zone.