| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated July 2006 | |
| England | Hertfordshire | Large | Terminated July 2017 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2008 | |
| England | Hertfordshire | Large | Terminated November 2013 | |
| England | Hertfordshire | Large | Terminated June 2005 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated February 2008 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated September 2000 | |
| England | Hertfordshire | Large | Terminated March 2004 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated September 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small |