---
title: "BIP39 Word #437: custom — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/custom/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #437 00110110100 

# custom — BIP39 word #437

"**custom**" is word #437 of the 2048 words in the official BIP39 English wordlist, between [cushion](/bip39-word/cushion/) and [cute](/bip39-word/cute/). In a seed phrase it stands for the 11-bit value `00110110100`, decimal index 436\. 

/ˈkʌstəm/  · _noun:_ a traditional way of behaving shared by a group of people 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): обычай 

## Binary Representation

Five 1-bits and six 0-bits; 462 of the 2048 indexes have exactly five 1-bits.

One wrong bit turns it into (leftmost bit first):

[repair](/bip39-word/repair/)[isolate](/bip39-word/isolate/)[bird](/bip39-word/bird/)[charge](/bip39-word/charge/)[direct](/bip39-word/direct/)[crater](/bip39-word/crater/)[cruel](/bip39-word/cruel/)[daring](/bip39-word/daring/)[current](/bip39-word/current/)[cycle](/bip39-word/cycle/)[cute](/bip39-word/cute/) 

Position

Hex Index

0x1B4

4-Letter Prefix

cust

## About "custom" in BIP39

- "custom" has 6 letters, but the first four, **"cust"**, already identify it, because **"cus"** also begins [cushion](/bip39-word/cushion/).
- **"cust"** is unique only within the English list: it also begins custode in the [Italian list](/italian/) and custear in the [Portuguese list](/portuguese/), so a four-letter backup should say which list it uses.

## Word #437 in the Other 9 BIP39 Wordlists

[Czech](/czech/) honorace 

[French](/french/) concert 

[Italian](/italian/) dado 

[Japanese](/japanese/) きみつ 

[Korean](/korean/) 마이크 

[Portuguese](/portuguese/) chegada 

[Spanish](/spanish/) colmo 

[Traditional Chinese](/chinese-traditional/) 太 

[Simplified Chinese](/chinese-simplified/) 太 

## Similar Words — Check Carefully During Recovery

Words sharing the first three letters "cus":

[cushion](/bip39-word/cushion/) 

## More BIP39 Words Starting with "C"

[ #254 cabbage ](/bip39-word/cabbage/)[ #255 cabin ](/bip39-word/cabin/)[ #433 current ](/bip39-word/current/)[ #434 curtain ](/bip39-word/curtain/)[ #435 curve ](/bip39-word/curve/)[ #436 cushion ](/bip39-word/cushion/)[ #438 cute ](/bip39-word/cute/)[ #439 cycle ](/bip39-word/cycle/) 

[View all words starting with "C" ](/bip39-words/c/) 

## Seed phrase, key and recovery guides

- [How to Generate a BIP39 Seed Phrase with Dice, Step by Step](/seed-phrase-with-dice/)
- [Derivation Path Explained: What m/44'/0'/0'/0/0 Means](/derivation-path/)
- [Seed Phrase Scams: How Thieves Get Your Recovery Words](/seed-phrase-scams/)

[ Full BIP39 Wordlist ](/)