According to the IHQ website, the flags for the following chapters (most of them, if not all, are inactive) have not yet been sponsored:

Eta Chapter
Theta Chapter
Kappa Chapter
Lambda Chapter
Pi Chapter
Chi Chapter
Alpha Zeta Chapter
Alpha Nu Chapter
Alpha Xi Chapter
Alpha Rho Chapter
Alpha Phi Chapter
Alpha Chi Chapter
Alpha Psi Chapter
Beta Theta Chapter
Beta Lambda Chapter
Beta Mu Chapter
Beta Nu Chapter
Beta Pi Chapter
Beta Rho Chapter
Gamma Epsilon Chapter
Gamma Theta Chapter
Gamma Kappa Chapter
Gamma Pi Chapter
Gamma Chi Chapter
Delta Lambda Chapter
Delta Mu Chapter
Epsilon Delta Chapter
Epsilon Theta Chapter
Epsilon Omicron Chapter
Epsilon Rho Chapter
Epsilon Sigma Chapter
Epsilon Tau Chapter
Zeta Lambda Chapter
Zeta Xi Chapter
Zeta Rho Chapter
Zeta Phi Chapter
Zeta Psi Chapter
Theta Alpha Chapter
Theta Gamma Chapter
Theta Theta Chapter
Theta Kappa Chapter
Theta Xi Chapter
Kappa Alpha Chapter

That's kind of a lot! If you belong to any of these chapters, or know someone who is an alumna to any of these chapters, please help IHQ and pass along this information! It'd be so wonderful to see all our chapters, inactive and active, represented in the Ballroom!