Check an XI EORI number (Northern Ireland)
Since the Northern Ireland Protocol, goods moving between Great Britain and Northern Ireland need an XI EORI number, which is separate from the GB one. Paste the XI number above and the checker queries the same EU database customs uses, so you find out before the shipment is held.
Check a GB EORI number
A GB EORI number is required for businesses importing into or exporting from Great Britain. EORICheck sends GB identifiers to HMRC and returns validity plus the registered trader name and address when the business agreed to publish them.
Which register answers each identifier
The prefix determines the authority. These routes were checked against the linked official documentation on 12 August 2026.
| Identifier | Register | What EORICheck returns |
|---|---|---|
| GB EORI | HMRC Check an EORI Number | Validity; trader name and address when the business consented to publication. |
| XI / EU-27 EORI | European Commission TAXUD EOS | Validity status, source and check time in EORICheck. |
| EU VAT | European Commission VIES | VAT validity; registered name and address when VIES returns them. |
Why prefixes matter
The prefix is part of the identifier. Changing GB to XI, or XI to GB, can turn a real number into a failed validation and delay a customs workflow.
Northern Ireland context
XI is used in specific Northern Ireland trade contexts. If the transaction depends on that distinction, verify the prefix and registration with the counterparty before filing.
When to confirm outside EORICheck
For binding UK customs questions, use the official UK or relevant customs authority guidance. EORICheck is a fast validation layer, not an authority.
FAQ
Can I use a GB EORI for every EU shipment?+
Not necessarily. The right identifier depends on the trade lane, customs role and current authority guidance.
Why does XI appear in EORI checks?+
XI appears in Northern Ireland related customs contexts. Treat the prefix as material and confirm it when the shipment depends on it.