| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated July 2011 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated December 1990 | |
| Wales | (pseudo) Wales | Small | Terminated December 1990 | |
| Wales | (pseudo) Wales | Small | Terminated December 1994 | |
| Wales | (pseudo) Wales | Small | Terminated December 1994 | |
| Wales | (pseudo) Wales | Small | Terminated September 2016 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated June 1998 | |
| Wales | (pseudo) Wales | Small |