Norway IBAN validator
How the IBAN format works
- Format
- NO + 2 check digits + 11-digit bank/account number (15 chars)
- Example
- NO9386011117947
Things to watch for
- Shortest IBAN of all countries at 15 characters
^NO[0-9]{2}[0-9]{11}$A Norwegian IBAN is only 15 characters — the shortest of any country in the IBAN standard: “NO”, two check digits, and an 11-digit bank/account number. Unlike most short formats, that compactness isn’t just fewer digits with less error protection — the 11-digit block is Norway’s ordinary domestic account number, and its own final digit is a national modulus-11 check value computed from the digits before it, a layer of error detection that predates IBAN and sits underneath the mod-97 checksum the IBAN itself carries. Anyone paying a Norwegian supplier, sending money to family in Norway, or converting a familiar 11-digit Norwegian account number into IBAN form for a SEPA-adjacent transfer needs all 15 characters right — there’s very little length to hide a mistake in.
How this validator works
This tool checks the “NO” prefix and confirms the trailing block is exactly 11 digits, then runs the real mod-97 checksum (ISO 7064) Norwegian banks use to generate a valid IBAN — entirely in your browser, nothing sent to a server, no signup required. It validates the 11-digit block as a single unit rather than separately recomputing Norway’s internal mod-11 check digit, since isolating where that domestic formula applies isn’t something a generic client-side checker can safely assume.
What a pass doesn’t tell you
A pass confirms the 15 characters are correctly formed and internally consistent — not that the account exists, is open, or belongs to whoever you expect. This tool does no bank-name lookup and never contacts a bank or Norges Bank. If a Norwegian IBAN fails, double-check the 11-digit block against the account number on a statement first — with a number this short, a single transposed digit anywhere in it, including the check digit itself, is enough to fail the checksum.
Scope: Norwegian IBAN structure and mod-97 checksum validation only — not payment processing, bank-name lookup, or confirming an account is active, none of which a client-side check can establish. Use this validator to catch a typo before a transfer fails; use your bank to confirm the account itself.
Content last reviewed 2026-07-07.
IBAN FAQ
Why is a Norwegian IBAN the shortest of any country?
At 15 characters — 'NO', two check digits, and an 11-digit bank/account number — Norway's IBAN is the shortest in the standard, shorter even than Belgium's. It carries only the domestic Norwegian account number itself, with no extra branch-code or national-check block appended beyond what that number already contains.
What is the mod-11 check digit inside a Norwegian account number?
The last digit of Norway's 11-digit domestic bank/account number is itself a national check digit, computed with a modulus-11 formula that predates IBAN. It's a separate layer of error detection from the IBAN's own mod-97 checksum, embedded inside the account number rather than appended after it.
Does this tool separately verify that embedded mod-11 digit?
No. This tool treats the 11-digit block as a single unit and validates the IBAN as a whole using the mod-97 (ISO 7064) checksum — it doesn't isolate and recompute Norway's domestic mod-11 formula as a distinct step, and it doesn't confirm the account is open or belongs to anyone.