---
title: "BIP39 Word #1912: upon — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/upon/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1912 11101110111 

# upon — BIP39 word #1912

"**upon**" is word #1912 of the 2048 words in the official BIP39 English wordlist, between [uphold](/bip39-word/uphold/) and [upper](/bip39-word/upper/). In a seed phrase it stands for the 11-bit value `11101110111`, decimal index 1911\. 

/əˈpɒn/  · _preposition:_ on, or at the time of 

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

## Binary Representation

Nine 1-bits and two 0-bits; 55 of the 2048 indexes have exactly nine 1-bits.

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

[humble](/bip39-word/humble/)[puzzle](/bip39-word/puzzle/)[solve](/bip39-word/solve/)[year](/bip39-word/year/)[tragic](/bip39-word/tragic/)[turtle](/bip39-word/turtle/)[undo](/bip39-word/undo/)[useful](/bip39-word/useful/)[unveil](/bip39-word/unveil/)[upgrade](/bip39-word/upgrade/)[uphold](/bip39-word/uphold/) 

Position

Hex Index

0x777

4-Letter Prefix

upon

## About "upon" in BIP39

- "upon" has 4 letters, but the first three, **"upo"**, already identify it, because **"up"** also begins [update](/bip39-word/update/), [upgrade](/bip39-word/upgrade/), [uphold](/bip39-word/uphold/), [upper](/bip39-word/upper/) and [upset](/bip39-word/upset/). Three letters are enough for only 604 of the 2048 words.

## Word #1912 in the Other 9 BIP39 Wordlists

[Czech](/czech/) vytratit 

[French](/french/) train 

[Italian](/italian/) ubicato 

[Japanese](/japanese/) やさい 

[Korean](/korean/) 학술 

[Portuguese](/portuguese/) tracejar 

[Spanish](/spanish/) tripa 

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

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

## More BIP39 Words Starting with "U"

[ #1908 unveil ](/bip39-word/unveil/)[ #1909 update ](/bip39-word/update/)[ #1910 upgrade ](/bip39-word/upgrade/)[ #1911 uphold ](/bip39-word/uphold/)[ #1913 upper ](/bip39-word/upper/)[ #1914 upset ](/bip39-word/upset/)[ #1915 urban ](/bip39-word/urban/)[ #1916 urge ](/bip39-word/urge/) 

[View all words starting with "U" ](/bip39-words/u/) 

## Seed phrase, key and recovery guides

- [Why You Should Never Create Your Own Seed Phrase](/why-you-should-never-create-your-own-seed-phrase/)
- [12 vs 24 Word Seed Phrase: Which Is More Secure?](/12-vs-24-word-seed-phrase/)
- [BIP 157 Client-Side Block Filtering: Compact Filters Explained](/bip-157-client-side-block-filtering/)

[ Full BIP39 Wordlist ](/)