sparklight.biz has no AAAA records.
Apex domains cannot have CNAME records.
KnowBe4
Domain verification
knowbe4-site-verification=13261acead0d7dce1c5d1c1ff6f2a792
Pardot
Domain verification
pardot799523=7a8c49b67d3d67e0ddfe6273eb554dc43aad9c6047333b2de6dd0a99a8c73c6e
0ed1fe018a0ad4973516b644d5937e6f11dcb71daf;
MS=ms77682038
sending_domain799523=052f34161dc8b8dd7740c19509435b74de76d5c2429b207e908bce512b281b12
sitecore-domain-verification=0e315e46e64a44ff9e72c7e30c374e4f
Zone apex
Start of authority
Email
Serial
128
Refresh
3h
Retry
1h
Expire
30d
Negative cache TTL
15m