Counties with postcode SL3
About Postcode SL3
This postal code is assigned to Berkshire District , England, United Kingdom. This location-level postal code helps ensure accurate mail delivery and location identification.
Postal Code Format
United Kingdom uses alphanumeric postcodes with 7 characters (example: SW1A 1AA). In our directory, these codes are organized from countries down to counties.
- SL — Country (England)
- — District (Berkshire)
How to Use This Postcode SL3
When sending mail or packages to this area, use the postal code below to ensure accurate and timely delivery.
Address format example:
Recipient Name
House #, Street Name
Berkshire
England
SL3
United Kingdom
Domestic Mail
Include this postcode on all letters and packages sent within United Kingdom.
International Mail
For international deliveries, include "United Kingdom" on the last address line after the postcode.
Frequently Asked Questions
What area does this postcode cover?
This postcode covers England → Berkshire in United Kingdom.
Is this a valid List Post Code?
Yes. SL3 is an active postcode for England → Berkshire in United Kingdom. It follows the 7-character format used in this country.
How do I find the postal code for a specific address?
Search by country, county, and district to find the correct postcode in United Kingdom. Search Postcodes
Found incorrect info for SL3?
Useful Resources
Developer API
Get this data via API
Free JSON for postcode SL3.
https://api.listpostcode.com/v1/countries/GB/postcodes/SL3curl -H "x-api-key: YOUR_API_KEY" \
"https://api.listpostcode.com/v1/countries/GB/postcodes/SL3"Requests need a free API key.