Regex Tester & Validator

This regex matches various common formats of an Australian Business Number (ABN), including plain 11-digit and space-separated groupings like 2-3-3-3, 2-6-3, 8-3, 2-4-5, and 2-9. It is useful for extracting or validating ABNs from text, forms, or documents, ensuring the number is isolated by word boundaries. Note that it does not verify the ABN checksum.