TCP 8333
Synopsis
- TCP port 8333 is the default port for the Bitcoin mainnet peer-to-peer protocol.
- Bitcoin Core (bitcoind/Bitcoin-Qt) listens on 8333 for inbound node connections.
- Other Bitcoin node implementations using 8333 include btcd, bcoin, Bitcoin Knots, and Bitcoin Unlimited.
- Turnkey/node appliances such as Umbrel, RaspiBlitz, myNode, and Casa Node expose 8333 to accept inbound peers.
- Many operators (exchanges, mining operations, and block explorers running full nodes) connect over 8333 as part of normal Bitcoin networking.
- Security note: 8333 is frequently scanned and has been used for DDoS and eclipse-style attacks on Bitcoin nodes, though it is not commonly linked to remote code execution exploits.
Observed activity
Last 30 days
Detailed chart