This page shows where a file is used on other wikis. You can also find that information at the bottom of the file description page.

Search global file usage
File:US 421.svg
View (previous 50 | ) (20 | 50 | 100 | 250 | 500)
View (previous 50 | ) (20 | 50 | 100 | 250 | 500)
Retrieved from "https://en.wikivoyage.org/wiki/Special:GlobalUsage/US_421.svg"