Australia BSB code finder

A BSB carries no check digit, so this tool verifies the six digit shape, nothing more. The state digit decode follows the published convention (2 is NSW or ACT, 3 Victoria, 4 Queensland, 5 South Australia, 6 Western Australia, 7 Tasmania, 8 the Northern Territory and external territories); digits 0, 1, and 9 have no single meaning, since institutions assign them their own way. The institution name is a hint from a short dated prefix list, and an unknown prefix is answered "not listed here", never invalid, because real BSBs exist outside any short list. The three branch digits are shown as stored; branch names and addresses are not public data, and AusPayNet's BSB file is the only authoritative register.