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TCP 18444

ProtocolTCP
Port18444
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Synopsis

  • Bitcoin Core (bitcoind/bitcoin-qt) uses TCP port 18444 as the default P2P port in regtest mode (local testing network).
  • btcd (the Go implementation of Bitcoin) also defaults to TCP 18444 for regtest P2P connections.
  • Bitcoin Cash Node (BCHN) and Bitcoin SV (BSV) retain the Bitcoin regtest default and listen on TCP 18444 in regtest mode.
  • Many Bitcoin-derived nodes/frameworks that inherit Bitcoin’s networking defaults use TCP 18444 for regtest P2P connectivity.
  • Example: running bitcoind with -regtest listens on 127.0.0.1:18444 for peer connections.

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