The U.S. Treasury's Office of Foreign Assets Control has updated sanctions identifiers tied to the Central Bank of Iran, adding four cryptocurrency addresses to its July 14 Iran-related action.

The crypto detail matters because the addresses sit on Tron and appear to have handled substantial stablecoin flows. Chainalysis says the four wallets had received $165 million in stablecoins, and that $131 million in balances was immediately frozen by the issuer, Tether.

The move shows how sanctions enforcement is increasingly being applied at the token and wallet level, not only through exchanges or named companies. OFAC's action did not create a new stablecoin rule, but it added on-chain identifiers to a sanctioned entity record, giving issuers, compliance teams and analytics firms a concrete reference point for blocking activity.

CoinDesk reported the update as part of a broader U.S. pressure campaign on Iranian financial networks. The report follows earlier sanctions actions involving Iranian crypto exchanges and shadow exchange houses accused of helping sanctioned actors move value through digital assets.

For stablecoin markets, the useful signal is operational rather than promotional: major issuers can freeze balances when addresses are identified, and public chain data can make those freezes visible quickly. That transparency is helpful for enforcement, but it also reinforces how much control centralized stablecoin issuers retain over token balances on public blockchains.