All tools · page 239
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Lists AIM symbology identifiers returned by scanners and their meanings.
Explains when to assign EAN-13 versus UPC-A for retail products by region.
Explains when EAN-8 short codes are granted and their data constraints.
Explains how to assign GLNs for legal, functional, and physical locations.
Summarizes placement rules for retail package barcodes facing shelf scanners.
Computes the check digit for 17-digit SSCC bodies in logistics labeling.
Computes the 9th digit of US bank routing numbers with 371371 weights.
Validates IBAN structure and mod-97-1 checksums per country rules.
Computes ISIN check digits after letter-to-number expansion.
Computes CUSIP check digits with the doubled-letter algorithm.
Computes Verhoeff dihedral check digits used in several national ID schemes.
Applies configurable 2-7 and 2-9 weight sequences for custom mod-11 schemes.
Computes D-U-N-S number check digits with the doubling algorithm.
Computes shipping container check digits from owner code and serial number.
Validates seven-digit IMO ship numbers with weight expansion.
Computes ORCID iD check characters with ISO 7064 mod 11-2.
Computes the Luhn check digit for 10-digit US provider NPIs.
Validates DEA prescriber numbers with the 3-1-2-1-2 weighting rule.
Computes German PZN pharmacy check digits with mod 11 weighting.
Computes legal-entity identifier check digits with mod 97-10.
Maps leading IIN ranges to card brands for validation workflows.
Lists ISO 20022 purpose codes accepted in SEPA EPC QR remittance lines.
Validates mixed-case EIP-55 checksums on Ethereum addresses before encoding.