| Postcode | Country | County | Type | Status |
|---|---|---|---|
| England | Hertfordshire | Small | |
| England | (pseudo) England (UA/MD/LB) | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small | |
| England | Hertfordshire | Small |