Company Registers & Identifiers
Register guides and company identifier lookups
Look up a company by name or registration number and read the record the register itself publishes: legal name, registration number, status, legal form, registered address and, where the register publishes them, officers. These guides cover each major register and the identifiers it issues.
All 6 guides
D-U-N-S Number Lookup: Business Locations, Registry Checks and UEI
Find and interpret D-U-N-S business-location identifiers, distinguish SAM.gov UEI, and cross-check the legal entity against official company records.
ABN Lookup: Search by ABN, ACN or Business Name
What an ABN lookup actually tells you — and what it doesn't. How to spot a cancelled ABN, read trading names against the legal entity, confirm GST registration, and get emailed if the ABN status changes. Free, no account.
Companies House Search: The Complete Guide (UK, 2026)
Free UK company search via Companies House. Look up any registered UK company, filings, directors, PSCs, and beneficial owners — with API tips.
How to Read SEC Filings: 10-K, 10-Q, 8-K and Form 4
Understand SEC filing types, find key sections in 10-Ks and 10-Qs, interpret 8-K events and Form 4 trades, and use a CIK to follow a public company.
VAT Number Check: How to Validate Any EU VAT ID Free
Free VIES-based VAT number validation for all 27 EU member states, plus UK, Norway, Switzerland. Includes API, bulk validation, and common error fixes.
KVK Zoeken: Nederlands Handelsregister Doorzoeken (2026)
Zoek elk Nederlands bedrijf gratis in het KVK Handelsregister. Bedrijfsprofielen, UBOs, jaarrekeningen en KVK-nummers opzoeken — met API-tips.
Frequently Asked Questions
Is the data official?+
Where we can reach an official register directly, the record is labelled as an official source and links back to the register's own page. Where a register needs paid credentials, we fall back to a public dataset and label it as a non-official fallback.
Can I search several registers at once?+
Yes — the company lookup queries the register for the country you choose and cross-references public identifier datasets when the register cannot be reached.