--- title: "BIP39 Word #663: fan — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/fan/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #663 01010010110 # fan — BIP39 word #663 "**fan**" is word #663 of the 2048 words in the official BIP39 English wordlist, between [famous](/bip39-word/famous/) and [fancy](/bip39-word/fancy/). In a seed phrase it stands for the 11-bit value `01010010110`, decimal index 662\. /fæn/ · _noun:_ an enthusiastic admirer, or a device that moves air to cool [Russian](/ru/ "The BIP39 wordlist with Russian translations"): поклонник ## 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): [spot](/bip39-word/spot/)[barrel](/bip39-word/barrel/)[index](/bip39-word/index/)[drift](/bip39-word/drift/)[food](/bip39-word/food/)[fine](/bip39-word/fine/)[express](/bip39-word/express/)[fatigue](/bip39-word/fatigue/)[false](/bip39-word/false/)[family](/bip39-word/family/)[fancy](/bip39-word/fancy/) Position Hex Index 0x296 4-Letter Prefix fan ## About "fan" in BIP39 - All three letters of "fan" also begin longer words: [fancy](/bip39-word/fancy/) and [fantasy](/bip39-word/fantasy/). So "fan" cannot be shortened, and a backup that keeps the first four letters of each word stores it as **"fan"** but fancy as **"fanc"**. ## Word #663 in the Other 9 BIP39 Wordlists [Czech](/czech/) kovboj [French](/french/) enchère [Italian](/italian/) fiume [Japanese](/japanese/) このみ [Korean](/korean/) 보험 [Portuguese](/portuguese/) edificar [Spanish](/spanish/) exigir [Traditional Chinese](/chinese-traditional/) 盡 [Simplified Chinese](/chinese-simplified/) 尽 ## Similar Words — Check Carefully During Recovery 5 BIP39 words differ from "fan" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [can](/bip39-word/can/)[fat](/bip39-word/fat/)[fun](/bip39-word/fun/)[man](/bip39-word/man/)[van](/bip39-word/van/) Read aloud, "fan" /fæn/ is one sound away from these 2 words: [fine /faɪn/](/bip39-word/fine/)[phone /fəʊn/](/bip39-word/phone/) Words sharing the first three letters "fan": [fancy](/bip39-word/fancy/)[fantasy](/bip39-word/fantasy/) ## More BIP39 Words Starting with "F" [ #659 false ](/bip39-word/false/)[ #660 fame ](/bip39-word/fame/)[ #661 family ](/bip39-word/family/)[ #662 famous ](/bip39-word/famous/)[ #664 fancy ](/bip39-word/fancy/)[ #665 fantasy ](/bip39-word/fantasy/)[ #666 farm ](/bip39-word/farm/)[ #667 fashion ](/bip39-word/fashion/) [View all words starting with "F" ](/bip39-words/f/) ## Seed phrase, key and recovery guides - [Electrum Seed vs BIP39: Why Other Wallets Reject It](/electrum-seed-vs-bip39/) - [Cold Sharding: Splitting a Private Key Into Offline Shamir Shares](/cold-sharding-method-private-key-storage-strategy/) - [Test Your Wallet Backup: A Self-Audit of Your Seed Phrase](/hack-own-crypto-wallet/) [ Full BIP39 Wordlist ](/)