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Australia
Decode an Australian Bank-State-Branch number into the institution and the state it was allocated in.
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A BSB is written as two groups of three. For most institutions the first two digits identify the bank, the third the state the number was allocated in, and the last three the branch. Some institutions hold a three-digit prefix instead, and then no state is encoded.
BSBs carry no checksum, so a mistyped BSB that happens to be another real branch cannot be caught by arithmetic. The institution is read from AusPayNet's published key; for the branch's own details, use AusPayNet's BSB search.
Institutions are read from AusPayNet's key to BSB numbers, which says who holds each prefix. The state is read from the third digit only where AusPayNet's directory shows that digit consistently means one state.
See the data sourceCorrect bank details are half of a good transfer. The other half is what it costs: the fee and the exchange-rate margin.
FAQ
For a domestic Australian transfer, yes: a BSB and an account number. Money transfer services sending from abroad usually ask for both as well. A bank wire from abroad also needs the receiving bank's SWIFT/BIC code.
AusPayNet, which administers the BSB system, runs a free BSB search. This tool links to it.
Only institutions on a two-digit prefix encode the state in the third digit. Institutions on a three-digit prefix do not, and some third digits are not used for a state.
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