--- title: "BIP39 Word #1242: open — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/open/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #1242 10011011001 # open — BIP39 word #1242 "**open**" is word #1242 of the 2048 words in the official BIP39 English wordlist, between [only](/bip39-word/only/) and [opera](/bip39-word/opera/). In a seed phrase it stands for the 11-bit value `10011011001`, decimal index 1241\. /ˈəʊpən/ · _adjective:_ not closed or fastened, allowing things to pass through [Russian](/ru/ "The BIP39 wordlist with Russian translations"): открытый ## Binary Representation Six 1-bits and five 0-bits; 462 of the 2048 indexes have exactly six 1-bits. One wrong bit turns it into (leftmost bit first): [brass](/bip39-word/brass/)[swamp](/bip39-word/swamp/)[robot](/bip39-word/robot/)[menu](/bip39-word/menu/)[nasty](/bip39-word/nasty/)[palace](/bip39-word/palace/)[odor](/bip39-word/odor/)[olive](/bip39-word/olive/)[option](/bip39-word/option/)[opinion](/bip39-word/opinion/)[only](/bip39-word/only/) Position Hex Index 0x4D9 4-Letter Prefix open ## About "open" in BIP39 - It takes all four letters to identify "open": **"ope"** also begins [opera](/bip39-word/opera/). - "open" appears in one of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vector #24 (word 13 of 24). Every official vector passes the [checksum checker](/bip39-checksum-checker/), and [How BIP39 works](/how-bip39-works/) shows how the entropy turns into such words. Official test vector #24 [void](/bip39-word/void/) [come](/bip39-word/come/) [effort](/bip39-word/effort/) [suffer](/bip39-word/suffer/) [camp](/bip39-word/camp/) [survey](/bip39-word/survey/) [warrior](/bip39-word/warrior/) [heavy](/bip39-word/heavy/) [shoot](/bip39-word/shoot/) [primary](/bip39-word/primary/) [clutch](/bip39-word/clutch/) [crush](/bip39-word/crush/) open [amazing](/bip39-word/amazing/) [screen](/bip39-word/screen/) [patrol](/bip39-word/patrol/) [group](/bip39-word/group/) [space](/bip39-word/space/) [point](/bip39-word/point/) [ten](/bip39-word/ten/) [exist](/bip39-word/exist/) [slush](/bip39-word/slush/) [involve](/bip39-word/involve/) [unfold](/bip39-word/unfold/) ## Word #1242 in the Other 9 BIP39 Wordlists [Czech](/czech/) pocit [French](/french/) meuble [Italian](/italian/) peccato [Japanese](/japanese/) つみき [Korean](/korean/) 왼손 [Portuguese](/portuguese/) matinal [Spanish](/spanish/) nivel [Traditional Chinese](/chinese-traditional/) 抵 [Simplified Chinese](/chinese-simplified/) 抵 ## Similar Words — Check Carefully During Recovery 2 BIP39 words differ from "open" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [oven](/bip39-word/oven/)[pen](/bip39-word/pen/) Read aloud, "open" /ˈəʊpən/ is one sound away from this word: [ocean /ˈəʊʃən/](/bip39-word/ocean/) Words sharing the first three letters "ope": [opera](/bip39-word/opera/) ## More BIP39 Words Starting with "O" [ #1238 one ](/bip39-word/one/)[ #1239 onion ](/bip39-word/onion/)[ #1240 online ](/bip39-word/online/)[ #1241 only ](/bip39-word/only/)[ #1243 opera ](/bip39-word/opera/)[ #1244 opinion ](/bip39-word/opinion/)[ #1245 oppose ](/bip39-word/oppose/)[ #1246 option ](/bip39-word/option/) [View all words starting with "O" ](/bip39-words/o/) ## Seed phrase, key and recovery guides - [How to Create a Seed Phrase: Step-by-Step Guide and Examples](/create-a-seed-phrase/) - [BIP 44 – Multi-Account Hierarchy for Deterministic Wallets](/bip-44-multi-account-hierarchy-for-deterministic-wallets/) - [Electrum Seed vs BIP39: Why Other Wallets Reject It](/electrum-seed-vs-bip39/) [ Full BIP39 Wordlist ](/)