Postal code reference
78289 CEDEX
Postal code 78289 CEDEX is associated in the GeoNames source with Guyancourt in Île-de-France, FR. The published coordinate accuracy code is 5. This page belongs to a deterministic, country-stratified sample capped at 3,000 records per country; it is not a complete national postal directory. Coordinates represent recorded locations or centroids and must not be used to infer delivery boundaries or administrative jurisdiction.
1Country Count
3Nearest Airports Count
3Nearest Postal Codes Count
3.4Nearest Airport Distance Km
Key facts
- Postal code
- 78289 CEDEX
- Country
- FR
- Place
- Guyancourt
- Administrative area
- Île-de-France
- Administrative code
- 11
- Second-level area
- Yvelines
- Second-level code
- 78
- Third-level area
- Versailles
- Third-level code
- 784
- Coordinate accuracy code
- 5
- Latitude
- 48.7733
- Longitude
- 2.0739
- Sampling method
- Deterministic country-stratified sample; maximum 3,000 records per country
Field-level provenance
Sources for this profile
Dates and licenses apply to the specific facts and series supplied by each source.
GeoNames Postal Codes
- Applicable date
- 2026-08-02
- Dataset version
- 04cb6cc7ae5b
- License
- Creative Commons Attribution 4.0
- Attribution
- GeoNames
DataOfWorld deterministic postal profile template
- Applicable date
- 2026-08-02
- Dataset version
- postal-profile-v1
- License
- Copyright DataOfWorld; all rights reserved
- Attribution
- DataOfWorld
Reference data can change. Verify consequential decisions against the original source.