1B64QRxfaa35MVkf7sDjuGUYAP5izQt7Qi

P2PKH (1)

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Quantum exposure Reuse-exposed

P2PKH · reuse-exposed

P2PKH addresses hide the pubkey behind a SHA-256 + RIPEMD-160 hash UNTIL the first outgoing spend, which reveals it in the signature script or witness data. This address has been spent from, so its pubkey is permanently on chain. Every subsequent UTXO at this address is just as exposed as the moment of first spend.

First revealed at block 692,133 on 2021-07-22 (input_spend).

Context: Bitcoin quantum exposure report · Top exposed addresses · Quantum and Bitcoin (LearnBitcoin.com)

What we know about this address 4 findings ✓ corroborated by 4 sources

OFAC sanctioned (SUEX OTC, S.R.O.)

On the U.S. Treasury OFAC SDN list under program CYBER2. SDN UID 33151. Last synced 2026-06-21.

sanctioned view
OpenSanctions: US OFAC Specially Designated Nationals (SDN) List

On the OpenSanctions consolidated sanctions list, dataset 'US OFAC Specially Designated Nationals (SDN) List'. Schema: CryptoWallet.

sanctioned view
Huobi.com-2 (Exchanges)

Address attributed to 'Huobi.com-2' on walletexplorer.com (category: Exchanges). Balance 0.0000 BTC across 191 incoming txs; last used in block 932,524.

exchange view
WatchYourBack: username:asset-listed-under-us-treasury-ofac-sanctions-list

Tagged as 'username' (subcategory: asset-listed-under-us-treasury-ofac-sanctions-list) in the WatchYourBack tagging dataset. Sub-source: user. File: graphsense-tagpacks/20220510_graphsense_ofac.tags.

bitcoin-otc view