This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "European route E421" – news · newspapers · books · scholar · JSTOR (June 2019) (Learn how and when to remove this template message)
 | |
|---|---|
 | |
| Major junctions | |
| From | Eynatten (Belgium) |
| To | Luxembourg City (Luxembourg) |
| Location | |
| Countries |  Belgium Luxembourg |
| Highway system | |
E 421 is a European B class road in Belgium and Luxembourg, connecting the cities Eynatten - Eupen - St. Vith - Luxembourg City
