List of address prefixes

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Blockchain-based currencies use addresses, which are a Base58Check encoding of some hash, typically that of a public key. The encoding includes a version byte, which affects the first character in the address. The following is a list of some prefixes which are in use.

Initial byte(s) Leading symbol Use Example
00 1 Bitcoin pubkey hash 12CPLrAUPvhVwjZqBgww3sLdEg4Z888R1j
5 3 Bitcoin script hash 3EktnHQD7RiAE6uzMj2ZifT9YgRrkSgzQX
48 L Litecoin pubkey hash LhK2kQwiaAvhjWY799cZvMyYwnQAcxkarr
52 M or N Namecoin pubkey hash NATX6zEUNfxfvgVwz8qVnnw3hLhhYXhgQn
95 f Fairbrix pubkey hash fF6o8LeDAfswEpMbCW8BqaqmzMWS7TGgew
97 g GeistGeld pubkey hash gQ8YScyiMUTart6kUJpzhjPzAKfiYAwooc
105 j i0coin pubkey hash jWmCr5cKeQjV4iyfUyipfLGwVML8MvXhF2
111 m or n Bitcoin testnet pubkey hash mkJ7Bf5chdfw61d1m7gnDVAQV3EQQAb8iz
125 s Solidcoin pubkey hash sXNaMoYBocjcQJRLK53dkaQ5mWuKfvHB9f
127 t Tenebrix pubkey hash tUK2EQTMF6cN6vuNEfJtVf1BMqarvEZJBL
128 5 Uncompressed Bitcoin Private key 5Htn3FzuH3b1X5VF2zLTsAQzBcyzkZNJsa2egXN8ZFJTCqQm3Rq
128 K or L Compressed Bitcoin Private key L1aW4aubDFB7yfras2S1mN3bqg9nwySY8nkoLmJebSLD5BWv3ENZ
138 x ixcoin pubkey hash xoKDFH4uWpyzxUcCC5jCLFujRKayv3HHcV
196 2 Testnet script hash
239 9 Uncompressed Testnet Private key 91eWjgRmucdtYHpMdsHbn9h8UU8hdoMNSKj8p3QAj6VTLyBnjj6
239 c Compressed Testnet Private key cNJFgo1driFnPcBdBX8BrJrpxchBWXwXCvNH5SoSkdcF6JXXwHMm
0x142, 0x0143 6P Encrypted private key (BIP 38) 6PRVWUbkzzsbcVac2qwfssoUJAN1Xhrg6bNk8J7Nzm5H7kxEbn2Nh2ZoGg

The following table shows the leading symbol(s) and address length(s) for 160 bit hashes for each of the possible decimal version values:

Decimal version Leading symbol Address length
0 1 up to 34
1 Q-Z, a-k, m-o 33
2 o-z, 2 33 or 34
3 2 34
4 2 or 3 34
5-6 3 34
7 3 or 4 34
8 4 34
9 4 or 5 34
10-11 5 34
12 5 or 6 34
13 6 34
14 6 or 7 34
15-16 7 34
17 7 or 8 34
18 8 34
19 8 or 9 34
20-21 9 34
22 9 or A 34
23 A 34
24 A or B 34
25-26 B 34
27 B or C 34
28 C 34
29 C or D 34
30-31 D 34
32 D or E 34
33 E 34
34 E or F 34
35-36 F 34
37 F or G 34
38 G 34
39 G or H 34
40-41 H 34
42 H or J 34
43 J 34
44 J or K 34
45-46 K 34
47 K or L 34
48 L 34
49 L or M 34
50-51 M 34
52 M or N 34
53 N 34
54 N or P 34
55-56 P 34
57 P or Q 34
58 Q 34
59 Q or R 34
60-61 R 34
62 R or S 34
63 S 34
64 S or T 34
65-66 T 34
67 T or U 34
68 U 34
69 U or V 34
70-71 V 34
72 V or W 34
73 W 34
74 W or X 34
75-76 X 34
77 X or Y 34
78 Y 34
79 Y or Z 34
80-81 Z 34
82 Z or a 34
83 a 34
84 a or b 34
85 b 34
86 b or c 34
87-88 c 34
89 c or d 34
90 d 34
91 d or e 34
92-93 e 34
94 e or f 34
95 f 34
96 f or g 34
97-98 g 34
99 g or h 34
100 h 34
101 h or i 34
102-103 i 34
104 i or j 34
105 j 34
106 j or k 34
107-108 k 34
109 k or m 34
110 m 34
111 m or n 34
112-113 n 34
114 n or o 34
115 o 34
116 o or p 34
117-118 p 34
119 p or q 34
120 q 34
121 q or r 34
122-123 r 34
124 r or s 34
125 s 34
126 s or t 34
127-128 t 34
129 t or u 34
130 u 34
131 u or v 34
132-133 v 34
134 v or w 34
135 w 34
136 w or x 34
137-138 x 34
139 x or y 34
140 y 34
141 y or z 34
142-143 z 34
144 z or 2 34 or 35
145-255 2 35