📬 Postal Codes

Royal Mail 4-State Generator

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Alphanumeric [0–9 A–Z]

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Postal Codes

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1D Barcode

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Expert Guide & Technical Specs

Postal Barcode Guide — USPS, Royal Mail, KIX, AusPost & More

Complete guide to postal barcodes: USPS Intelligent Mail, PostNet, Royal Mail 4-State, KIX, Japanese Postal, Australian Post, and UPU S10. Free generators for all.

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📬More in Postal Codes

🇦🇺

Australian Post Standard Customer

Enter 8 digits

✉️

DAFT

Generic 4-state code (D, A, F, T)

🚚

DPD Barcode

DPD parcel label data structure

🇯🇵

Japanese Postal Code

7 digits ZIP plus address code

🇳🇱

KIX (TNT Post Netherlands)

Encodes the full ASCII set

🇰🇷

Korean Postal Authority Code

Enter 6 digits