Is HARBGB21 a valid SWIFT code?

Yes. HARBGB21 has the right format and is in our directory for HARPENDEN BUILDING SOCIETY, HARPENDEN. Confirm with the beneficiary that it is the bank that holds their account.

What is the difference between HARBGB21 and HARBGB21XXX?

None. HARBGB21 is the 8-character form of HARBGB21XXX; XXX at the end means the head office. Either works.

SWIFT/BIC · United Kingdom

HARBGB21

HARPENDEN BUILDING SOCIETY · Head office · HARPENDEN

Code details

SWIFT/BIC: HARBGB21 (HARBGB21XXX)
Institution: HARPENDEN BUILDING SOCIETY
Office: Head office
Branch code: XXX · head office
Address: MARDALL HOUSE, 9-11 VAUGHAN ROAD, AL5 4HU HARPENDEN
City: HARPENDEN
Country: United Kingdom

What HARBGB21 means

HARBGB21XXX

HARBBank code
Four letters chosen by the institution.
GBCountry code
United Kingdom (ISO 3166)
21Location code
Where the institution sits on the SWIFT network. A 1 in second place marks a passive participant.
XXXBranch code
XXX, or nothing at all, means the head office.

Paying an account at this bank

You will also need the beneficiary’s IBAN. United Kingdom IBANs have 22 characters and start with GB. IBAN format and example → Check an IBAN →

Questions

Is HARBGB21 a valid SWIFT code?: Yes. HARBGB21 has the right format and is in our directory for HARPENDEN BUILDING SOCIETY, HARPENDEN. Confirm with the beneficiary that it is the bank that holds their account.
What is the difference between HARBGB21 and HARBGB21XXX?: None. HARBGB21 is the 8-character form of HARBGB21XXX; XXX at the end means the head office. Either works.

Sending to HARBGB21?

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About this data

Codes are checked against our directory of banks on TrillioniPay corridors. Always confirm the code with the beneficiary’s bank before sending a payment. Last updated: 23 September 2026.

Institution names and addresses: Global Legal Entity Identifier Foundation (GLEIF) LEI data, available under CC0. The address is the legal entity’s registered or head-office address, which can differ from the office SWIFT lists.

SWIFT © and database rights August 2026. All rights reserved. This Mapping Table has been developed by SWIFT. Any use of the Mapping Table, in whole or in part, is subject to the BIC/LEI Mapping Table License Agreement as published with the Mapping Table available on GLEIF's website. The Mapping Table is updated monthly. For the latest BIC information and updates, always refer to www.swift.com/bic .