The United States Post Office Publication 25 describes the POSTNET barcode used to print zipcodes for automatic sorting.
| Character Code | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Symbol | leftguard | zero | one | two | three | four | five | six | seven | eight | nine | rightguard |
| Glyph | | | | | | | | | | | | |
A POSTNET font accompanies this presentation.