DNSBuddy
DKIM Selector Discovery

Find likely DKIM selectors for a domain

DNSBuddy reads SPF includes to infer email vendors, then probes the DKIM selectors those vendors commonly publish.

Check a known selector
Discover DKIM selectors
Leave the selector blank. The backend will use SPF-guided discovery with a wildcard DNS canary and a capped selector probe list.

Try

How selector discovery works

DKIM selectors are not enumerable from DNS. DNSBuddy starts with vendors detected in SPF, tries their common selectors first, checks for wildcard DNS, and stops after a bounded probe list.