POCKET TOOLS
KYC Tools
Verify IBAN, VAT numbers, and business identifiers. All check-digit calculations run locally.
Pocket Tools
Browser-based due diligence checks for everyday screening and reference work.
Banking
IBAN
Structure, country length, and MOD-97 verification run locally.
Tax
VAT
Format checks plus direct access to VIES for registration confirmation.
Business
Registers
National number formats, registry links, and quick reference tables.
IBAN Verification
Offline — validates structure, length, check digits (ISO 13616 / MOD-97), and identifies the issuing bank where possible.
Algorithm: ISO 13616 check — rearrange (move first 4 chars to end), convert letters A=10…Z=35, compute MOD 97. Valid if remainder = 1. Country-specific length and BBAN format are also verified.
Supported Countries & IBAN Lengths
EU-27 member states plus EEA, UK, Switzerland, and other common jurisdictions.
VAT Number Validation
Offline — verifies format and check-digit algorithms for EU-27 VAT numbers.
Online — optionally verify against the EU VIES database.
Algorithms per country: AT (MOD 96), BE (MOD 97), BG (weighted sum), CY (format), CZ (modular), DE (ISO 7064 MOD 11,10), DK (MOD 11), EE (weighted MOD 11), EL/GR (MOD 11), ES (composite), FI (MOD 11), FR (MOD 97 / SIREN), HR (MOD 11), HU (weighted MOD 10), IE (MOD 23), IT (Luhn-variant), LT (MOD 11), LU (MOD 89), LV (format), MT (weighted), NL (MOD 97), PL (MOD 11), PT (MOD 11), RO (weighted), SE (Luhn on 10 digits), SI (MOD 11), SK (MOD 11).
VIES — EU VAT Information Exchange System
The official VAT database for confirming the validity of numbers issued by member states.
While the offline check verifies the mathematical structure of a VAT number, VIES confirms it is actually registered and active with the relevant tax authority. Use both for complete due diligence.
Open VIES Portal (ec.europa.eu)Business Registration Number
Offline — validates format, check digits, and identifies the registration authority where applicable.
Official Business Registers
Links to national commercial registries for live lookups.
| Country | Official register | Live lookup |
|---|---|---|
| Austria | Firmenbuch (Austrian Business Register) | justizonline.gv.at/jop/web/firmenbuchabfrage |
| Belgium | Crossroads Bank for Enterprises (CBE/KBO/BCE) | myenterprise.be CBE Public Search |
| Bulgaria | Commercial Register and Register of Non-Profit Legal Entities | portal.registryagency.bg/en/home-cr |
| Croatia | Court Register (Sudski registar) | sudreg.pravosudje.hr |
| Cyprus | Register of Companies / Department of Companies and Intellectual Property | efiling.drcor.mcit.gov.cy/DrcorPublic/SearchForm.aspx?cultureInfo=en-AU&sc=0 |
| Czechia | Public Register / Commercial Register (Ministry of Justice) | or.justice.cz |
| Denmark | Central Business Register (CVR) | virk.dk |
| Estonia | e-Business Register | ariregister.rik.ee/eng |
| Finland | Trade Register / YTJ Company and Organisation Search | ytj.fi/en/index/companysearch.html |
| France | National Business Register (RNE) / official public company search | data.inpi.fr annuaire-entreprises.data.gouv.fr |
| Germany | Handelsregister / Unternehmensregister | handelsregister.de unternehmensregister.de |
| Greece | General Commercial Registry (G.E.MI.) | businessportal.gr gov.gr search service |
| Hungary | Company Register (Cegjegyzek / e-cegjegyzek) | e-cegjegyzek.hu |
| Ireland | Companies Registration Office (CRO) / CORE search | cro.ie CORE company search |
| Italy | Registro delle Imprese (Italian Business Register) | registroimprese.it italianbusinessregister.it/en |
| Latvia | Register of Enterprises | ur.gov.lv/en/ |
| Lithuania | Register of Legal Entities | registrucentras.lt/jar/p_en/ |
| Luxembourg | Luxembourg Trade and Companies Register (RCS) | lbr.lu |
| Malta | Malta Business Registry (MBR) | register.mbr.mt/app/query/search_for_company |
| Netherlands | KVK Business Register (Handelsregister) | kvk.nl/en/search/ |
| Poland | National Court Register (KRS) | ekrs.ms.gov.pl/web/wyszukiwarka-krs/strona-glowna/ |
| Portugal | Commercial Registry / IRN services | registo.justica.gov.pt Request permanent certificate / Services |
| Romania | National Trade Register Office (ONRC / NTRO) | onrc.ro/index.php/en/ |
| Slovakia | Business Register of the Slovak Republic | orsr.sk/search_subjekt.asp?lan=en |
| Slovenia | Slovenian Business Register (AJPES / PRS) | ajpes.si/registers/slovenian_business_register |
| Spain | Registro Mercantil / Registrars of Spain | sede.registradores.org/site/mercantil?lang=en_EN |
| Sweden | Bolagsverket company information search | bolagsverket.se/en/sokforetagsinformation/omsokforetagsinformation.3045.html |
| EU-wide fallback | BRIS / e-Justice Find a company | webgate.ec.europa.eu/e-justice/searchBris.do |
IBAN Structure Reference
Complete EU-27+ IBAN format specifications used by the offline validator.
| Country | Code | Length | BBAN Format | Example |
|---|
VAT Number Format Reference
Domestic VAT number format and check-digit algorithm for each EU-27 member state.
| Country | Prefix | Format | Check Algorithm |
|---|
Resources & Standards
Further reading and official sources.
| Resource | Description |
|---|---|
| VIES | EU VAT Information Exchange System |
| SWIFT IBAN Registry | Official IBAN format registry by SWIFT |
| ISO 13616 | International Bank Account Number standard |
| BRIS | Business Registers Interconnection System |
| DG TAXUD | EU VAT rules and regulations |