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Norway IBAN Validator

Validates a Norwegian IBAN: the mod-97 checksum, the 15-character length and the structure, with the bank code identified.

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In short A Norwegian IBAN is exactly 15 characters: NO, two check digits, then 4 digits, then 6 digits, then 1 digits — so the 4 characters after the check digits are the bank code — 8601 in the example — and the remaining 7 are the account number, 1117947. Norway has the shortest IBAN in the registry at fifteen characters, and its last digit is a national MOD-11 check on the eleven before it. So a Norwegian number is checked twice, by two different moduli. The checksum is ISO 7064 MOD-97-10: move the first four characters to the end, turn each letter into its position in the alphabet plus nine, and read the result as one long number, which must leave remainder 1 when divided by 97. That catches every single-character mistake and almost every swap of two neighbouring characters, which is what it was designed for and why an IBAN is worth checking before you pay rather than after. What it cannot do is tell you the account exists, is open, or belongs to the person you think — a random string of the right shape passes about once in 97 tries, and no amount of arithmetic reaches into a bank. This page runs entirely in your browser, so the number you type is not sent anywhere.

How to use the Norway IBAN Validator

  1. Paste the Norwegian IBAN — spaces and dashes are fine.
  2. Read the three checks: mod-97, length and structure.
  3. If it fails, the page says which check failed and what that usually means.

About the Norway IBAN Validator

Checks a Norwegian IBAN three ways — checksum, length and structure — and says which of the three failed when one does, because they mean different things.

What people use it for

  • Checking a Norwegian IBAN before sending money to it.
  • Finding the bank code inside an IBAN you have been given.
  • Confirming a Norwegian number was typed or pasted correctly.

Details

Length15 characters, always
Structure4!n6!n1!n after the check digits
In wordsNO, 2 check digits, then 4 digits, then 6 digits, then 1 digits
Bank code4 characters — 8601 in the example
ExampleNO93 8601 1117 947
Check digitsAlways between 02 and 98. 00, 01 and 99 cannot occur
PrivacyThe arithmetic runs in your browser. Nothing you type is sent anywhere

The maths behind it

This tool uses ISO 7064 MOD-97-10 — move the first four characters to the end, replace each letter with its position plus nine, and a valid IBAN leaves remainder 1 on division by 97. On top of that, Norwegian IBANs are exactly 15 characters and follow 4!n6!n1!n. Every intermediate value is shown on screen, so the result can be checked by hand.

Three checks, reported separately on purpose. A length error means a character is missing or extra, a structure error means a letter sits where a digit belongs, and a checksum failure with both of those right means a genuine typo inside the number — most often two neighbouring characters swapped.

Where this tool stops

It checks arithmetic and shape. It cannot tell you the account exists or who it belongs to, it does not look the bank up, and it does not verify any national check digits Norway may use inside its own account number — those are separate rules, computed differently, and passing mod-97 says nothing about them.

Frequently asked questions

How many characters is a Norwegian IBAN?
Exactly 15, with no exceptions. After the two check digits the structure is 4!n6!n1!n — 4 digits, then 6 digits, then 1 digits. A number of any other length is not a Norwegian IBAN, whatever else about it looks right.
Why is the Norwegian IBAN only fifteen characters?
Because the domestic account number is eleven digits and Norway did not pad it. It is the shortest of the eighty-seven, less than half the length of Saint Lucia’s thirty-two.
Where is the bank code in a Norwegian IBAN?
The 4 characters after the check digits are the bank code — 8601 in the example — and the remaining 7 are the account number, 1117947.
Does a valid checksum mean the account exists?
No, and this is the thing worth taking away. Mod-97 proves the number is internally consistent — that it was probably typed correctly. It says nothing about whether the account is open, or whose it is. A random string of the right length passes about once in every 97 attempts. Only the bank can confirm the rest.
Is it safe to paste an IBAN here?
The checking happens in your browser and the number is never sent to a server — there is no request to make one. An IBAN is not a secret the way a card number is, since it is printed on every invoice you send, but it is still yours, and it does not leave your machine here.
Does the Norway IBAN Validator cost anything?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the utility.
Is the Norway IBAN Validator safe to use with private information?
No. The Norway IBAN Validator runs entirely in your browser using JavaScript. Because the work happens locally, the utility also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
Can I check the maths myself?
It uses ISO 7064 MOD-97-10 — move the first four characters to the end, replace each letter with its position plus nine, and a valid IBAN leaves remainder 1 on division by 97. On top of that, Norwegian IBANs are exactly 15 characters and follow 4!n6!n1!n. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Who is the Norway IBAN Validator for?
In practice it gets used for three things: checking a Norwegian IBAN before sending money to it. Finding the bank code inside an IBAN you have been given. Confirming a Norwegian number was typed or pasted correctly. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the Norway IBAN Validator cannot do?
It checks arithmetic and shape. It cannot tell you the account exists or who it belongs to, it does not look the bank up, and it does not verify any national check digits Norway may use inside its own account number — those are separate rules, computed differently, and passing mod-97 says nothing about them. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the Norway IBAN Validator work from?
Length is 15 characters, always. Structure is 4!n6!n1!n after the check digits. In words is NO, 2 check digits, then 4 digits, then 6 digits, then 1 digits. These are printed on the page itself, so you do not have to take them on trust.
Will this work on a tablet?
Yes. The page is responsive and the utility works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.

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