International Standard Text Code - Format

Format

ISTC numbers are hexadecimal, so may be formed from numbers 0-9 and letters A-F. They are made up of four parts:

  1. registry agency element - denotes which agency the work was registered through;
  2. registration year element - denotes what year the work was registered in;
  3. work element - 8 digit hexadecimal number, unique within year/agency;
  4. check digit - calculated using a MOD 16-3 algorithm defined by ISO 7064.

Example: ISTC A02-2009-000004BE-A

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