ASN

noun

By · According to Wiktionary data (CC BY-SA) ·

"asn" is a 3-letter English headword indexed on PlainSpell.

The verdict

“ASN” is uncommon English (frequency #54,021 among 3,931 “A” headwords), classed as a noun. The kind of spelling people second-guess.

#54,021
frequency rank, English
3,931
“A” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of autonomous system number.

Corpus desk

Index EN-asn · ASN · English

ASN · rank #54,021 · 0 variants · 0 confusables

  • FREQ-RARE #54,021
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH ashen

Nearest frequency peer: ashen (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “ASN”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “ASN” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for ASN
PropertyValue
HeadwordASN
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#54,021
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “ASN” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).ASNfalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “ashen” (#54,020), “atheistic” (#54,022), “augur” (#54,024). Among 3,931 “A” headwords, “ASN” is #54,021. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

ASN is uncommon English at frequency #54,021 among 3,931 “A” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

ASN has no tracked misspelling variants, and the word's spelling is regular enough that our generator found nothing worth flagging. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: Abbreviation The correct English form is ASN, spelled A-S-N.

Definition

  1. 1
    Initialism of autonomous system number.
  2. 2
    Initialism of advance shipping notice.

Etymology

Abbreviation

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "ASN"?
"ASN" is spelled A-S-N.
What does "ASN" mean?
As a noun, "ASN" means: Initialism of autonomous system number.
What is the origin of the word "ASN"?
Abbreviation See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "ASN", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

aks#53,994BMJ#54,051zod#53,966Zan#53,964

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list