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What does the address start with?

The first characters usually name the network and the address type. One page per prefix, with what it can be confused with.

1BBitcoin26–34 characters 3BBitcoin34 characters bc1qBBitcoin42 or 62 characters bc1pBBitcoin62 characters 0xEEthereum and every EVM chain42 characters (0x + 40 hex)TTTRON34 characters rXXRP Ledger25–35 characters XXXRP Ledger47 characters GSStellar56 characters EQ / UQTTON48 characters ltc1ŁLitecoin43 or 63 characters LŁLitecoin34 characters MŁLitecoin34 characters DDDogecoin34 characters addr1ACardano58 (enterprise) or 103 (base) characters cosmos1CCosmos Hub45 characters 4 / 8MMonero95 or 106 characters