| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated August 2004 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated May 1994 | |
| England | Hertfordshire | Large | Terminated July 2005 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2003 | |
| England | Hertfordshire | Small | Terminated April 2005 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated September 2007 | |
| England | Hertfordshire | Large | Terminated December 1991 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | Terminated May 2005 | |
| England | Hertfordshire | Large | Terminated December 2013 | |
| England | Hertfordshire | Small |