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What does a Bitcoin address begin with?
Bitcoin addresses begin with specific prefixes that denote the type of address and the corresponding blockchain network.
Sep 27, 2024 at 05:06 pm
- Identification: A Bitcoin address serves as a unique identifier for a Bitcoin account, similar to a bank account number. It allows individuals to send and receive Bitcoin securely.
- Format: A valid Bitcoin address comprises a string of numbers and letters that typically starts with a particular prefix. This prefix denotes the type of address and the corresponding blockchain network.
- Mainnet Addresses:
- Native SegWit (Bech32): Begins with "bc1q," "bc1p," or "bc1r."
- Non-Native SegWit (P2SH-SegWit): Begins with "3."
- Testnet Addresses:
- Native SegWit (Bech32): Begins with "tb1q," "tb1p," or "tb1r."
- Non-Native SegWit (P2SH-SegWit): Begins with "m" or "2."
- Legacy Addresses (P2PKH):
- Begins with "1."
- Multisignature Addresses:
- m of n Support: Begins with "2," followed by a number to indicate the required number of signatures (e.g., "23" for a 3-of-3 multisignature address).
- Unique Characteristics:
- Bitcoin addresses are case-sensitive.
- They can contain a combination of uppercase and lowercase letters, as well as numbers.
- They are typically between 26 and 35 characters long.
- Security:
- Bitcoin addresses are considered reliable since they are generated cryptographically using public-key cryptography.
- Keeping private keys (which correspond to Bitcoin addresses) secure is crucial for maintaining funds.
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