What does the number represent from the irsCode field returned?

IRS CODES
0 - TIN and Name combination matches IRS records.
1 - TIN was missing or TIN not 9-digit numeric.
2 - TIN entered is not currently issued.
3 - TIN and Name combination does not match IRS records.
4 - Invalid TIN Matching request.
5 - Duplicate TIN Matching request
6 - TIN and Name combination matches IRS SSN records. (or) TIN and Name combination matches IRS ITIN records.
7 - TIN and Name combination matches IRS EIN records. (or) TIN and Name combination matches IRS ITIN records.
8 - TIN and Name combination matches IRS SSN and EIN records. (or) TIN and Name combination matches IRS ITIN records.

tin-ein-verification-behavior