Updated: Nov. 15, 2022
Our company helps people recover their lost Bitcoin and other crypto assets.
People often contact us with information about a long string of numbers and letters -- sometimes they wrote themselves a note years ago, and they're hoping that we can help them identify what the characters mean.
This article should help you identify some of these strings.
| Starts with… | Number of Characters | Example |
| Explanation | Notes | |
| 5 | 51 | 5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF |
| Bitcoin private key in WIF format associated with uncompressed public keys | source | |
| 6P | 58 | 6PYKNsNn1Fq1QrAG581zP1t1KdmPDoncTeeXnHvugPdFvxvkJWjH1DRNX1 |
| BIP38 Encrypted Private Key | source | |
| capital L or K | 52 | |
| Bitcoin private key in WIF format associated with compressed public keys | source | |
| capital L or M | 52 | |
| Bitcoin private key (WIF, compressed pubkey, Electrum-defined and deprecated) | source | |
| S | 30 | S6c56bnXQiBjk9mqSYE7ykVQ7NzrRy |
| Mini private key format | source | |
| Hex | 64 | E9873D79 | Hex | 64 | E9873D79C6D87DC0FB6A5778633389F4453213303DA61F20BD67FC233AA33262 |
| Private key in hexadecimal format | source | |
| 1 | 27 – 34 | 1LQoWist8KkaUXSPKZHNvEyfrEkPHzSsCd |
| Bitcoin address | ||
| L, 3 or M | 26 – 35 | MGxNPPB7eBoWPUaprtX9v9CXJZoD2465zN |
| Litecoin address | ||
| 3 | 27 – 34 | 34xp4vRoCGJym3xR7yCVPFHoCNxv4Twseo |
| Bitcoin address | ||
| bc1 | 42,62 | bc1qgdjqv0av3q56jvd82tkdjpy7gdp9ut8tlqmgrpmv24sq90ecnvqqjwvw97 |
| Bech32 Bitcoin address | source | |
| Hex | 64 | 8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f |
| Ethereum private key | source | |
| 0x | 42 | 0xDC25EF3F5B8A186998338A2ADA83795FBA2D695E |
| Ethereum or ERC20 address | Crypto news and insights, delivered weeklyAll the Latest on Crypto news, Wallet Security, and DeFi in 10 Minutes or Less We care about your data in our privacy policy.  | |