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What to type for ISSN

The 13-digit barcode number of a periodical: 977, the first 7 digits of the ISSN, 2 variant digits (often 00), then the check digit.

Format977 + 7 ISSN digits + 2 variant digits (+ check)

Examples (tap to use)

About ISSN →

9770317847001
SVGPNGDecode this →

Anatomy

Start guardDigit 7 · L (odd parity) set · parity pattern LGGLGL encodes the leading 97Digit 7 · G (even parity) set · parity pattern LGGLGL encodes the leading 97Digit 0 · G (even parity) set · parity pattern LGGLGL encodes the leading 90Digit 3 · L (odd parity) set · parity pattern LGGLGL encodes the leading 93Digit 1 · G (even parity) set · parity pattern LGGLGL encodes the leading 91Digit 7 · L (odd parity) set · parity pattern LGGLGL encodes the leading 97Centre guardDigit 8 · R set8Digit 4 · R set4Digit 7 · R set7Digit 0 · R set0Digit 0 · R set0Digit 1 · R set · check digit1End guard9

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