torzon-links.store
Address record · fr6bvsrc

The address read from its tail

Its final eight characters are uams2tad. Like every other address in this set it ends in the same character, which is a property of the format rather than of this string.

Length▲56 + .onionCorrect for a version 3 address
Alphabet▲passOnly a to z and 2 to 7
Shared prefix0 charsNo other address here shares its first character
fr6bvsrcx7ajxou7kyme5otctzdmpllum6iqootcjnwmzepuuams2tad.onion

What the string reports

Computed fields

Full address
fr6bvsrcx7ajxou7kyme5otctzdmpllum6iqootcjnwmzepuuams2tad.onion
Characters before .onion
56
Characters including suffix
62
Alphabet check
pass · no 0, 1, 8 or 9
Letters
50
Digits
6 · 10.7% of the string
Distinct symbols used
28 of 32
Symbols never used
g h 3 4
Most frequent symbol
m · 5 times
Longest run of one character
2 · l
Opens with the market name
no
Longest prefix shared with another address here
0 · none

The last character was never in play

Every one of the twelve published strings ends with the same letter. Not most of them. All twelve. That is not a coincidence and it is not a house style. The final characters of a version 3 onion address encode a checksum and a version number rather than key material, and the version number is fixed, so the last character comes out the same for every address of this generation in existence.

Which means the tail of a string is worth slightly less than it looks. Eight characters that appear to be eight independent checks are really seven, because one of them was decided before the key existed. It is a small deduction and nobody should lose sleep over it, but it is the sort of thing an explorer should say out loud rather than let a reader assume.

The habit it should change is the one where people verify a TorZon working link by glancing at the first four characters and the last four. That is an eight character check on a 56 character string, and one of those eight is free. Someone producing a lookalike knows this as well as you do. If they are grinding for a prefix they will also happily take whatever suffix falls out, because the suffix costs nothing to match on the one character that is fixed and is not worth grinding for on the rest.

This particular address is also among the most letter-heavy in the set, with only six digits across all 56 positions. Combined with a digit-free stretch at the end it produces a tail that reads smoothly and therefore convincingly. Smooth and convincing are not the same as checked.

The three zones of this string

The head carries one digit, the middle two and the tail one. The closing character is fixed by the address format and is identical across all twelve published strings.

ZoneCharactersValueDigits
Head1 to 8fr6bvsrc1
Middle21 to 405otctzdmpllum6iqootc2
Tail49 to 56uams2tad1
Nothing here was measuredEvery field on this page was computed from the characters above. This site never opens an address, so it cannot tell you whether this one loads, and it will not print an uptime figure or a last checked date. Read what this explorer cannot tell you.

Questions

Why do all TorZon onion addresses end with the same letter?

Because the final bits of a version 3 address encode the version number, which is the same for every address of this type. That constant lands in the last character after base32 encoding.

Does that make the ending useless for checking?

Not useless, just weaker than it appears. Seven of the last eight characters still vary. The point is that the eight character check people actually perform is smaller than they think.