# ISIN Validator Validate International Securities Identification Numbers (ISO 6166 ISIN) with Luhn check-digit verification, country/issuer prefix and NSIN breakdown. > Canonical page: https://elysiatools.com/en/tools/isin-validator - **Category:** Validation - **Keywords:** isin, iso 6166, securities, stock, bond, nsin, check digit, luhn ## Overview The ISIN Validator is a specialized utility designed to verify International Securities Identification Numbers (ISO 6166) by performing Luhn check-digit verification, extracting the country prefix, and isolating the National Securities Identifying Number (NSIN). ## Inputs - **ISIN Code** (text): 12-character ISIN. Spaces and dashes are tolerated. ## When to use - When verifying the structural validity of a stock, bond, or ETF identifier before submitting financial transactions. - When parsing a 12-character ISIN to extract the country of origin and the underlying National Securities Identifying Number. - When troubleshooting data entry errors in financial databases containing international securities identifiers. ## How it works - Enter the 12-character ISIN code, with or without spaces and dashes. - The tool strips non-alphanumeric characters and validates the format against the ISO 6166 standard. - It extracts the 2-character country code, the 9-character NSIN, and computes the Luhn check digit to verify the final character. ## Use cases - Validating corporate bond identifiers before importing them into portfolio management systems. - Verifying stock ISINs during data migration between financial databases. - Confirming the country prefix and NSIN structure of newly issued international securities. ## Frequently asked questions ### What is an ISIN? An ISIN (International Securities Identification Number) is a 12-character alphanumeric code that uniquely identifies a specific security, such as a stock, bond, or warrant. ### How does the Luhn check digit verification work for ISINs? The tool converts letters to numbers, applies the Luhn algorithm (double-add-double) to the digits, and verifies if the resulting sum matches the final check digit. ### Does this tool support spaces or hyphens in the input? Yes, the validator automatically ignores spaces and dashes during the validation process. ### Can this tool check if a security is active or currently traded? No, this tool only validates the structural correctness and checksum of the ISIN; it does not query live market databases. ### What is an NSIN? The National Securities Identifying Number (NSIN) is the 9-character middle section of the ISIN that identifies the security within its home country. ## Related tools - [Credit Card Validator](https://elysiatools.com/en/tools/credit-card-validator): Validate credit card numbers and identify card type (Visa, MasterCard, UnionPay, etc.) - [CUSIP Validator](https://elysiatools.com/en/tools/cusip-validator): Validate 9-character CUSIP North American securities identifiers with mod-10 check-digit verification, issuer base and issue-number breakdown. - [EIN Validator](https://elysiatools.com/en/tools/ein-validator): Validate US Employer Identification Numbers - [ICCID Validator](https://elysiatools.com/en/tools/iccid-validator): Validate ICCID numbers for SIM cards with Luhn checksum and issuer analysis - [ISBN Validator](https://elysiatools.com/en/tools/isbn-validator): Validate ISBN-10 and ISBN-13 book number formats with checksum verification - [Luhn Checksum Calculator](https://elysiatools.com/en/tools/luhn-checksum): Validate or generate numbers using the Luhn algorithm (mod-10). Works for credit cards, IMEI, IMEISV, SIN, NPI and any custom Luhn-based identifier. - [SEDOL Validator](https://elysiatools.com/en/tools/sedol-validator): Validate 7-character UK/Irish SEDOL securities identifiers with weighted mod-10 check-digit verification and SEDOL-7 structure breakdown. - [SWIFT Code Validator](https://elysiatools.com/en/tools/swift-code-validator): Validate SWIFT/BIC bank identification codes ## Samples - [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion - [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion - [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion ## Related content - [Check Digit, Checksum, and Identifier Validation Tools](https://elysiatools.com/en/hubs/check-digit-checksum-validation): Validate Luhn, Mod-11, GTIN, ISBN, IMEI, ICCID, VIN, IBAN, and ISIN codes in one focused hub for checksum-driven identifier checks. - [Identifier, Config, and Input Validation Tools](https://elysiatools.com/en/hubs/validation-validate): Compare validators for email, phone, IP, dates, cron, barcodes, payment details, env files, and other real-world inputs in one hub. - [Identifier, Address, and Code Format Validators](https://elysiatools.com/en/hubs/validation-format): Curated tools for identifier, address, account, and code format validation in one hub. - [JSON Schema and API Contract Validation Tools](https://elysiatools.com/en/hubs/json-validate): Compare JSON schema validation, OpenAPI response checks, mutation testing, stress testing, and breaking-change detection tools in one hub for API contract review.