What Does this Long String of Letters and Numbers Mean?

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
S 22 SzavMBLoXU6kDrqtUVmffv Mini private key format source
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 source
  40 DC25EF3F5B8A186998338A2ADA83795FBA2D695E Could be Ethereum or ERC20 address. Try adding “0x” at the beginning and check for transactions source