Why the MCC matters
Card networks use MCC 3173 to set interchange rates for this business type, decide whether purchases count toward category rewards, and flag special handling (for example cash-like or high-risk categories). Issuers and tax authorities rely on the same code, which is why the IRS classification appears above.
Nearby codes
31693170317131723174317531763177
Browse the full MCC list, or identify a card's issuer with the BIN checker.
Frequently Asked Questions
What is MCC 3173?
MCC 3173 is the merchant category code for Airlines under ISO 18245. Card networks use it to classify transactions at this type of business for interchange fees, rewards categories and tax reporting.
Is MCC 3173 IRS reportable?
IRS 1099-K reportability for MCC 3173: Yes.