All postcodes in HU20 3
| Postcode | Place | Type |
|---|---|---|
| HU20 3AB | — | street |
| HU20 3UA | Little Weighton | street |
| HU20 3UJ | Little Weighton | street |
| HU20 3UL | Little Weighton | street |
| HU20 3UN | — | street |
| HU20 3UP | — | street |
| HU20 3UQ | Little Weighton | street |
| HU20 3UR | High Hunsley | street |
| HU20 3US | Little Weighton | street |
| HU20 3UT | Little Weighton | street |
| HU20 3UU | Little Weighton | street |
| HU20 3UW | — | street |
| HU20 3UX | Little Weighton | street |
| HU20 3UY | Little Weighton | street |
| HU20 3UZ | — | street |
| HU20 3WW | Cottingham | large user |
| HU20 3XA | Little Weighton | street |
| HU20 3XB | Little Weighton | street |
| HU20 3XD | Little Weighton | street |
| HU20 3XE | Little Weighton | street |
| HU20 3XF | Little Weighton | street |
| HU20 3XG | Little Weighton | street |
| HU20 3XH | Little Weighton | street |
| HU20 3XJ | Little Weighton | street |
| HU20 3XL | Little Weighton | street |
| HU20 3XN | Little Weighton | street |
| HU20 3XP | Little Weighton | street |
| HU20 3XQ | Little Weighton | street |
| HU20 3XR | Rowley | street |
| HU20 3XS | Riplingham | street |
| HU20 3XT | Riplingham | street |
| HU20 3XU | Little Weighton | street |
| HU20 3XW | Little Weighton | street |
| HU20 3XX | — | street |
Places in sector HU20 3
- Little Weighton 23
- Riplingham 2
- Cottingham 1
- High Hunsley 1
- Rowley 1