777B559B2C12672D4B4656D25BE3A5C6.172A7881B55426D8F43B2EF054BACBAF.sectigo.COM AXFR zone transfer

Not an apex domain The domain 777B559B2C12672D4B4656D25BE3A5C6.172A7881B55426D8F43B2EF054BACBAF.sectigo.COM is not the root of its zone.
Instead, try zone transfer on sectigo.COM .