AI summary
An ABN is an eleven-digit Australian Business Number used by businesses and organizations in tax and government dealings. An ACN is a nine-digit Australian Company Number issued by ASIC only to registered companies. A company can have both: the ABN identifies the broader business registration, while the ACN identifies the company record.
Each receipt below describes its exact retained artifact or live source. Dates and digests never cross artifact boundaries.
Evidence publisher: Australian Business Register. Source date: 2026-07-20.
No captured bytes are represented; use the live publisher link to re-check this source.
Evidence publisher: Australian Securities and Investments Commission (ASIC). Source date: 2026-07-20.
No captured bytes are represented; use the live publisher link to re-check this source.
Scope and material limitation
This comparison is limited to the identifier definitions published by ABR and ASIC. A current lookup is still required for a particular business or company.
Dated source facts
Source-snapshot manifest receipt
This receipt attests the source snapshot manifest, not any individual fact.
The answer-series chain record is unsigned. It does not authenticate a person, organization, eligibility state, or individual fact.
221f2b53d685edab207ffaef711f5d684f7127b111d6dd7dbf927cb82c5173f83410166194a23afe5301442d9f219288e9023bd76ec77b94b64afa24498fdf01358ec3766f51394730e3ad6b60b1df098b6c7059828c40143b0626abfac90b210unsignedPrimary-source chain
Limitation: ABN guidance covers the broader business identifier. It does not establish that every ABN holder is a company or supply a complete company-register record.
Limitation: ACN guidance applies to ASIC-registered companies. It does not cover every Australian business structure or substitute for a current register search.
Re-derive this answer from the cited government file; no Fonteum account is required.
Methodology and limitations
Frequently asked questions
What’s on file, by the numbers
Platform snapshot · 2026-08-12
Integrated, with-data, and fresh-observation counts are separate. No platform-wide source-completeness count is published. Completeness is source-specific and must be evaluated against the named source's expected scope. State coverage is a separate jurisdiction measure.
Source authority is record-specific
Use the issuer named on the record.
Fonteum spans federal, state, and global public publishers. A source page or returned record identifies its issuer and dataset where that metadata is available. A platform registry count does not assign every page to one authority or establish loaded, fresh, or complete coverage.
Reproducible by design
Inspect the evidence each published figure actually supplies.
Source and date
Research pages expose the named public file and observation date where those fields are available. Source-file SHA-256 coverage is separate; facts do not currently link deterministically to signatures.
Available derivation
Studies with a retained release and committed derivation link the SQL or method used. Other studies state the evidence and reproduction limits they actually have.
Daily observations
Dated table row-count observations can detect local drift. They do not imply that an upstream publisher released or Fonteum ingested new data that day.
Named medical review
Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.