S99
UK postcode district
Updated September 2026
District overview
- Postcode units
- 43
- Current units
- 35
- Coordinate coverage
- 88%
- Electoral wards
- 1
Coverage context
- Countries represented
- England
- English regions represented
- Yorkshire and the Humber
- Local authority codes
- 1
- Terminated postcode units
- 8
Postcode sectors in S99
Choose a sector to browse its complete postcode-unit directory.