| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated February 2009 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | (pseudo) England (UA/MD/LB) | Large | Terminated October 2013 | |
| England | (pseudo) England (UA/MD/LB) | Large | Terminated August 2012 | |
| England | Hertfordshire | Large | Terminated August 2016 | |
| England | Hertfordshire | Large | Terminated July 2007 | |
| England | Hertfordshire | Large | Terminated April 2009 | |
| England | Hertfordshire | Large | Terminated January 2004 | |
| Large | Terminated June 2009 | |||
| England | Hertfordshire | Large | Terminated July 2013 | |
| England | Hertfordshire | Large | ||
| Large | Terminated August 2009 | |||
| Large | Terminated November 2009 | |||
| Large | Terminated November 2009 | |||
| England | Hertfordshire | Large | Terminated May 2012 | |
| Large | Terminated January 2010 | |||
| England | Hertfordshire | Large | Terminated January 2018 | |
| Large | Terminated June 2011 | |||
| Large | Terminated February 2011 | |||
| England | Hertfordshire | Large | Terminated July 2018 |