diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f720ed17d..9a32a4502e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 ### Fixes
 
 - Use proper SDK name for Session Replay tags ([#4428](https://github.com/getsentry/sentry-react-native/pull/4428))
+- Use `makeDsn` from `core` to extract the URL from DSN avoiding unimplemented `URL.protocol` errors ([#4395]https://github.com/getsentry/sentry-react-native/pull/4395)
 
 ### Changes
 
diff --git a/packages/core/src/js/sdk.tsx b/packages/core/src/js/sdk.tsx
index 0d37fb215f..3c6fdff90c 100644
--- a/packages/core/src/js/sdk.tsx
+++ b/packages/core/src/js/sdk.tsx
@@ -1,6 +1,6 @@
 /* eslint-disable complexity */
 import type { Breadcrumb, BreadcrumbHint, Integration, Scope, SendFeedbackParams, UserFeedback } from '@sentry/core';
-import { captureFeedback, getClient, getGlobalScope, getIntegrationsToSetup, getIsolationScope, initAndBind, logger, stackParserFromStackParserOptions, withScope as coreWithScope } from '@sentry/core';
+import { captureFeedback, getClient, getGlobalScope, getIntegrationsToSetup, getIsolationScope, initAndBind, logger, makeDsn, stackParserFromStackParserOptions, withScope as coreWithScope } from '@sentry/core';
 import {
   defaultStackParser,
   makeFetchTransport,
@@ -66,13 +66,13 @@ export function init(passedOptions: ReactNativeOptions): void {
     if (!dsn) {
       return undefined;
     }
-    try {
-      const url = new URL(dsn);
-      return `${url.protocol}//${url.host}`;
-    } catch (e) {
-      logger.error('Failed to extract url from DSN', e);
+    const dsnComponents = makeDsn(dsn);
+    if (!dsnComponents) {
+      logger.error('Failed to extract url from DSN: ', dsn);
       return undefined;
     }
+    const port = dsnComponents.port ? `:${dsnComponents.port}` : '';
+    return `${dsnComponents.protocol}://${dsnComponents.host}${port}`;
   };
 
   const userBeforeBreadcrumb = safeFactory(passedOptions.beforeBreadcrumb, { loggerMessage: 'The beforeBreadcrumb threw an error' });
diff --git a/packages/core/test/sdk.test.ts b/packages/core/test/sdk.test.ts
index 386bb66dbd..afd6137c8a 100644
--- a/packages/core/test/sdk.test.ts
+++ b/packages/core/test/sdk.test.ts
@@ -321,7 +321,7 @@ describe('Tests the SDK functionality', () => {
       expect(result).toBeNull();
     });
 
-    it('should filters out dsn breadcrumbs', () => {
+    it('should filter out dsn breadcrumbs', () => {
       (getDevServer as jest.Mock).mockReturnValue({ url: 'http://localhost:8081' });
 
       const mockBeforeBreadcrumb = (breadcrumb: Breadcrumb, _hint?: BreadcrumbHint) => {
@@ -345,21 +345,39 @@ describe('Tests the SDK functionality', () => {
       expect(result).toBeNull();
     });
 
-    it('should keep breadcrumbs matching dsn if the url parsing fails for dsn', () => {
+    it('should filter out dsn breadcrumbs that the ports match', () => {
       (getDevServer as jest.Mock).mockReturnValue({ url: 'http://localhost:8081' });
 
       const mockBeforeBreadcrumb = (breadcrumb: Breadcrumb, _hint?: BreadcrumbHint) => {
         return breadcrumb;
       };
 
-      // Mock the URL constructor to throw an exception for this test case
-      const originalURL = (global as any).URL;
-      jest.spyOn(global as any, 'URL').mockImplementationOnce(() => {
-        throw new Error('Failed to parse DSN URL');
-      });
+      const passedOptions = {
+        dsn: 'https://sentry@selfhosted.app.server:8181/1234567',
+        beforeBreadcrumb: mockBeforeBreadcrumb,
+      };
+
+      init(passedOptions);
+
+      const breadcrumb: Breadcrumb = {
+        type: 'http',
+        data: { url: 'https://selfhosted.app.server:8181/api' },
+      };
+
+      const result = usedOptions()?.beforeBreadcrumb!(breadcrumb);
+
+      expect(result).toBeNull();
+    });
+
+    it('should keep breadcrumbs if the ports do not match', () => {
+      (getDevServer as jest.Mock).mockReturnValue({ url: 'http://localhost:8081' });
+
+      const mockBeforeBreadcrumb = (breadcrumb: Breadcrumb, _hint?: BreadcrumbHint) => {
+        return breadcrumb;
+      };
 
       const passedOptions = {
-        dsn: 'https://abc@def.ingest.sentry.io/1234567',
+        dsn: 'https://sentry@selfhosted.app.server:8181/1234567',
         beforeBreadcrumb: mockBeforeBreadcrumb,
       };
 
@@ -367,15 +385,36 @@ describe('Tests the SDK functionality', () => {
 
       const breadcrumb: Breadcrumb = {
         type: 'http',
-        data: { url: 'https://def.ingest.sentry.io/1234567' },
+        data: { url: 'https://selfhosted.app.server:8080/api' },
       };
 
       const result = usedOptions()?.beforeBreadcrumb!(breadcrumb);
 
       expect(result).toEqual(breadcrumb);
+    });
+
+    it('should keep breadcrumbs if the url parsing fails for dsn', () => {
+      (getDevServer as jest.Mock).mockReturnValue({ url: 'http://localhost:8081' });
+
+      const mockBeforeBreadcrumb = (breadcrumb: Breadcrumb, _hint?: BreadcrumbHint) => {
+        return breadcrumb;
+      };
+
+      const passedOptions = {
+        dsn: 'invalid-dsn',
+        beforeBreadcrumb: mockBeforeBreadcrumb,
+      };
+
+      init(passedOptions);
 
-      // Restore the original URL constructor
-      (global as any).URL = originalURL;
+      const breadcrumb: Breadcrumb = {
+        type: 'http',
+        data: { url: 'https://def.ingest.sentry.io/1234567' },
+      };
+
+      const result = usedOptions()?.beforeBreadcrumb!(breadcrumb);
+
+      expect(result).toEqual(breadcrumb);
     });
 
     it('should keep non dev server or dsn breadcrumbs', () => {