React Router 4 - Route to a default component if a broken link has entered

I am working on React Router 4. I have some components like home, page1.., and page404. I want to redirect to the page404 if a broken link has entered.

            <Router>
                <AppContainer>
                    <Route exact path={HOME_URL} component={Home}/>
                    <Route path={SEARCH_RESULTS_URL} component={SearchResults}/>
                    <Route path={PAGE_404} component={Page404}/>
                </AppContainer>
            </Router>

Can anyone please suggest a method.