The Rarest Urbit Sigils

What makes an Urbit sigil rare?

Urbit Names

First let's take a brief look at Urbit names.  All ships in the Urbit network are named using 3-letter syllables, and there are 512 syllables in total.

These unique syllables are separated into two groups: 256 prefixes, and 256 suffixes.  The syllables are listed in full at the bottom of this article.

The names of the 256 galaxies in the urbit network are the same as the 256 suffixes:

~dev

Star names are made from just one word, a prefix followed by a suffix:

~rondev

Planet names are made up of two 6-letter words:

~pinwyl-dirbet

In this example pin and dir are prefixes, and wyl and bet are suffixes.

Point Numbers

Each of the 256 prefixes and 256 suffixes also have an 8-bit numerical value, ranging from 0-255.

For example, both doz and zod have the value 0, but one is a prefix and one is a suffix.

Hexadecimal numbers (beginning with 0x) are useful for reading point numbers, as you can view the data byte-by-byte.

dev is a suffix with value 179 or 0xb3, and the point number of galaxy ~dev is also 179.

~dev
 0x 00 00 00 b3 

The point number for a star is a 16-bit number where the suffix value is in the lower 8 bits, and the prefix value is in the upper 8 bits.

ron has the value 0x60 and dev has the value 0xb3, so the point number for ~rondev is 0x60b3 or 24,755 in decimal.

~rondev
 0x 00 00 60 b3 

Planets are represented by 32-bit numbers, but the syllables in the name do not match up with the bytes in the point number.

~pinwyl-dirbet
 0x a0 57 60 b3 

Planet names are obfuscated, so it's not obvious which star they come from. This system effectively shuffles all the planet names and distributes them amongst all the stars.

If they were not obfuscated, each star would have a very predicatable and boring list of planets:

~doznec-rondev
~dozbud-rondev
~dozwes-rondev
~dozsev-rondev
...

Instead, these are the actual names:

~tipnel-finfen
~holfyl-torwes
~ropwyl-larsel
~moctyv-sabtec
...

Basic Glyphs

The syllables in an Urbit name translate exactly to the glyphs in the sigil for that name.  Every syllable has it's own glyph.

pin
wyl
dir
bet

The individual glyphs are combined left-to-right and top-to-bottom.

~pinwyl-dirbet

When you use the Sigil search tool, you can see all the glyphs are categorized into 12 general shapes.

Even though all 512 glyphs have one of these 12 shapes, they are each unique due to other stylistic elements.

Rarity

The key to what makes a sigil's shape rare is the number of glyphs in each group, and whether those glyphs are prefixes or suffixes.

PrefixesSuffixes
4039
3035
219
619
52
06
530
040
2616
556
661
433

From this we can see that some sigils are impossible because certain glyphs never appear in the prefix or suffix position. The rarest sigil shapes are those using the least common glyphs for a particular position.

Here are the uncommon prefixes from that table:

fad
fos
had
han
lis
mic
pic
rad
ric
hob
nim
sim
tim
tob
doc
fal
hal
soc
wal
wit

These are the uncommon suffixes:

ryl
fun
tun
der
dur
per
ser
ter
wer

ryl is the only suffix of that shape, and sigils with 2 ryl appear only once per star on average.

You will notice that the rarest shaped sigils contain the syllables above.

The Rarest Sigils

Let's check out some of the rarest and most aesthetic shapes. These rare sigils won't be found for sale on urbit.me, but you can browse all the planets and see what stars they belong to.

See the full list of rare shapes here: Rare Sigil Shapes

These are only samples of the rare shapes, browse through the rest here: Rare Sigil Shapes

Appendix

All Prefixes

doz
mar
bin
wan
sam
lit
sig
hid
fid
lis
sog
dir
wac
sab
wis
sib
rig
sol
dop
mod
fog
lid
hop
dar
dor
lor
hod
fol
rin
tog
sil
mir
hol
pas
lac
rov
liv
dal
sat
lib
tab
han
tic
pid
tor
bol
fos
dot
los
dil
for
pil
ram
tir
win
tad
bic
dif
roc
wid
bis
das
mid
lop
ril
nar
dap
mol
san
loc
nov
sit
nid
tip
sic
rop
wit
nat
pan
min
rit
pod
mot
tam
tol
sav
pos
nap
nop
som
fin
fon
ban
mor
wor
sip
ron
nor
bot
wic
soc
wat
dol
mag
pic
dav
bid
bal
tim
tas
mal
lig
siv
tag
pad
sal
div
dac
tan
sid
fab
tar
mon
ran
nis
wol
mis
pal
las
dis
map
rab
tob
rol
lat
lon
nod
nav
fig
nom
nib
pag
sop
ral
bil
had
doc
rid
moc
pac
rav
rip
fal
tod
til
tin
hap
mic
fan
pat
tac
lab
mog
sim
son
pin
lom
ric
tap
fir
has
bos
bat
poc
hac
tid
hav
sap
lin
dib
hos
dab
bit
bar
rac
par
lod
dos
bor
toc
hil
mac
tom
dig
fil
fas
mit
hob
har
mig
hin
rad
mas
hal
rag
lag
fad
top
mop
hab
nil
nos
mil
fop
fam
dat
nol
din
hat
nac
ris
fot
rib
hoc
nim
lar
fit
wal
rap
sar
nal
mos
lan
don
dan
lad
dov
riv
bac
pol
lap
tal
pit
nam
bon
ros
ton
fod
pon
sov
noc
sor
lav
mat
mip
fip

All Suffixes

zod
nec
bud
wes
sev
per
sut
let
ful
pen
syt
dur
wep
ser
wyl
sun
ryp
syx
dyr
nup
heb
peg
lup
dep
dys
put
lug
hec
ryt
tyv
syd
nex
lun
mep
lut
sep
pes
del
sul
ped
tem
led
tul
met
wen
byn
hex
feb
pyl
dul
het
mev
rut
tyl
wyd
tep
bes
dex
sef
wyc
bur
der
nep
pur
rys
reb
den
nut
sub
pet
rul
syn
reg
tyd
sup
sem
wyn
rec
meg
net
sec
mul
nym
tev
web
sum
mut
nyx
rex
teb
fus
hep
ben
mus
wyx
sym
sel
ruc
dec
wex
syr
wet
dyl
myn
mes
det
bet
bel
tux
tug
myr
pel
syp
ter
meb
set
dut
deg
tex
sur
fel
tud
nux
rux
ren
wyt
nub
med
lyt
dus
neb
rum
tyn
seg
lyx
pun
res
red
fun
rev
ref
mec
ted
rus
bex
leb
dux
ryn
num
pyx
ryg
ryx
fep
tyr
tus
tyc
leg
nem
fer
mer
ten
lus
nus
syl
tec
mex
pub
rym
tuc
fyl
lep
deb
ber
mug
hut
tun
byl
sud
pem
dev
lur
def
bus
bep
run
mel
pex
dyt
byt
typ
lev
myl
wed
duc
fur
fex
nul
luc
len
ner
lex
rup
ned
lec
ryd
lyd
fen
wel
nyd
hus
rel
rud
nes
hes
fet
des
ret
dun
ler
nyr
seb
hul
ryl
lud
rem
lys
fyn
wer
ryc
sug
nys
nyl
lyn
dyn
dem
lux
fed
sed
bec
mun
lyr
tes
mud
nyt
byr
sen
weg
fyr
mur
tel
rep
teg
pec
nel
nev
fes