UK Bank Account Validator

UK Bank Account Validator is a bulk UK sort code and account number checker: it runs the official Vocalink (Pay.UK) modulus checking rules, including all exceptions, so you can catch mistyped bank details before Direct Debits, payouts or Faster Payments.

Best for: Direct Debit and payout onboarding, payroll and supplier payment files, CRM and billing data cleansing.

How to validate UK sort codes and account numbers

1. Add accounts to Accounts: "08-99-99 66374958" or {"sortCode": "200915", "accountNumber": "41011166"}.
2. Click Start.
3. Filter on valid and read reason for any failures.

How it works

Downloads the latest Vocalink valacdos.txt and scsubtab.txt rules each run, with a bundled copy as fallback. It implements MOD10, MOD11 and DBLAL plus exceptions 1-14, and passes all of Vocalink's published test cases. 6- and 7-digit account numbers are zero-padded; 9/10-digit formats are not supported yet.

Output

sortCode, accountNumber, valid, modulusChecked, methods, exceptions, reason, tableSource

Pricing (pay-per-event)

• account-checked: $0.001 per result ($1 / 1,000). Platform usage is included; you pay only for results.
• Example: 10,000 accounts cost $10.00.

Example input

{
  "accounts": [
    "08-99-99 66374958",
    {
      "sortCode": "200915",
      "accountNumber": "41011166"
    }
  ]
}

Example output

Real output for 08-99-99 66374958 (a run on 15 Oct 2026). Failed or unchecked accounts also include a reason, e.g. when a foreign currency account cannot be modulus-checked.

{
  "input": {
    "sortCode": "08-99-99",
    "accountNumber": "66374958"
  },
  "sortCode": "08-99-99",
  "accountNumber": "66374958",
  "methods": [
    "MOD10"
  ],
  "exceptions": [],
  "valid": true,
  "modulusChecked": true,
  "tableSource": "live"
}

Use it via API, schedules and integrations

Run it in Apify Console, or call it from your own code with the Apify API or the Python and JavaScript clients. Save an input as a task and add a schedule to run it regularly, and send results to Slack, email, webhooks, Zapier, Make or n8n with Apify integrations. AI agents can find and run it through the Apify MCP server.

from apify_client import ApifyClient

client = ApifyClient("YOUR_APIFY_TOKEN")
run = client.actor("sterlingverify/uk-sortcode-checker").call(run_input={"accounts": ["08-99-99 66374958"]})
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

FAQ

Does a pass mean the account exists?

No. A modulus pass means the number is well-formed, not that the account exists, is open or belongs to the payee. Use Confirmation of Payee for that.

Which account number formats are supported?

8-digit numbers, with 6- and 7-digit numbers zero-padded. 9- and 10-digit formats are not supported yet.

Disclaimer

A modulus pass means the number is well-formed, not that the account exists, is open, or belongs to the payee; use Confirmation of Payee for that. Sort codes absent from the table can't be checked and are returned as valid, per Vocalink guidance. Uses Vocalink's publicly published modulus checking data; not affiliated with Vocalink or Pay.UK. No bank-name lookup (the EISCD is not public).

Related sterlingVerify tools

Part of the sterlingVerify UK payments, KYB and data toolkit on Apify Store:

• IBAN Validator: offline bulk IBAN validation and parsing
• BIN Lookup: bulk BIN lookup for scheme, type, issuer and country
• UK Company Check: Companies House, VAT and UK sanctions KYB check in one call
• EU VAT Number Validator (VIES): bulk EU VAT number checks against VIES