CO1 1AA is located in the Castle electoral ward, within the local authority district of Colchester and the English Parliamentary constituency of Colchester. The Sub Integrated Care Board (ICB) Location is NHS Suffolk and North East Essex ICB - 06T and the police force is Essex. This postcode has been in use since June 2016.


| Easting | 599710 |
| Northing | 225348 |
| Latitude | 51.890906 |
| Longitude | 0.900864 |
| Country | England |
| Postcode District | CO1 |
Elevation or altitude of CO1 1AA as distance above sea level:
| Metres | Feet | |
|---|---|---|
| Elevation | 20m | 66ft |
Elevation is measured from the approximate centre of the postcode, to the nearest point on an OS contour line from OS Terrain 50, which has contour spacing of ten vertical metres.
➜ How high above sea level am I? Find the elevation of your current position using your device's GPS.
| Ward | Castle |
|---|---|
| Constituency | Colchester |
3, DUTCH COURT, WILLIAMS WALK, COLCHESTER, CO1 1AA 2021 26 MAR £380,000 |
1, DUTCH COURT, WILLIAMS WALK, COLCHESTER, CO1 1AA 2016 27 JUL £449,995 |
| The George (High Street) | Colchester Town Centre | 121m |
| The George (High Street) | Colchester Town Centre | 121m |
| Angel Court (High Street) | Colchester Town Centre | 140m |
| Angel Court (High Street) | Colchester Town Centre | 145m |
| High Street | Colchester Town Centre | 280m |
| Colchester Town Station | 0.6km |
| Colchester Station | 1.2km |
| Hythe (Essex) Station | 1.9km |
| Percentage of properties with Next Generation Access | 100.0% |
| Percentage of properties with Superfast Broadband | 100.0% |
| Percentage of properties with Ultrafast Broadband | 0.0% |
| Percentage of properties with Full Fibre Broadband | 0.0% |
Superfast Broadband is between 30Mbps and 300Mbps
Ultrafast Broadband is > 300Mbps
| Percentage of properties unable to receive 2Mbps | 0.0% |
| Percentage of properties unable to receive 5Mbps | 0.0% |
| Percentage of properties unable to receive 10Mbps | 0.0% |
| Percentage of properties unable to receive 30Mbps | 0.0% |



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| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Hippodrome High Street | 18:30 | 12:30 | 128m |
| Culver Street East | 18:30 | 12:30 | 198m |
| Culver Street East | 18:30 | 12:30 | 199m |
The below table lists the International Territorial Level (ITL) codes (formerly Nomenclature of Territorial Units for Statistics (NUTS) codes) and Local Administrative Units (LAU) codes for CO1 1AA:
| ITL 1 Code | Name |
|---|---|
| TLH | East |
| ITL 2 Code | Name |
| TLH3 | Essex |
| ITL 3 Code | Name |
| TLH34 | Essex Haven Gateway |
| LAU 1 Code | Name |
| E07000071 | Colchester |
The below table lists the Census Output Area (OA), Lower Layer Super Output Area (LSOA), and Middle Layer Super Output Area (MSOA) for CO1 1AA:
| Code | Name | |
|---|---|---|
| OA | E00109958 | |
| LSOA | E01021649 | Colchester 007D |
| MSOA | E02004512 | Colchester 007 |
| CO1 1TS | Williams Walk | 21m |
| CO1 1SS | East Stockwell Street | 48m |
| CO1 1TT | Maidenburgh Street | 74m |
| CO1 1SR | East Stockwell Street | 80m |
| CO1 1ST | East Stockwell Street | 83m |
| CO1 1UA | Taylor Court | 85m |
| CO1 1SZ | High Street | 105m |
| CO1 1SP | High Street | 119m |
| CO1 1HN | West Stockwell Street | 120m |
| CO1 1TB | High Street | 121m |