sparkpostmail.com has no AAAA records.
Apex domains cannot have CNAME records.
Google
Domain verification
google-site-verification=yCMV3z3BhBaINi0V033HnfTi9xkQjpIZ4DM4ywSlwUs
Yahoo
Domain verification
yahoo-verification-key=3FbuT+COxdPHeqY8GDS1MS5lZ+Y4R0w0MCU5RmkGdic=
202309142210142gjgf5fwokyagxwm41zux4qqpsky7k3ybnkqsbic1mlkhki0he
ns-1361.awsdns-42.org
Amazon Web Services
Route 53
ns-1855.awsdns-39.co.uk
Amazon Web Services
Route 53
ns-304.awsdns-38.com
Amazon Web Services
Route 53
ns-775.awsdns-32.net
Amazon Web Services
Route 53
Zone apex
Start of authority
Email
Serial
1
Refresh
2h
Retry
15m
Expire
14d
Negative cache TTL
1d