---
title: "Web Push: Notifications in Subdomains"
slug: "web-push-notifications-in-subdomains"
description: "Learn how Web Push opt-ins and notifications work across multiple domains and subdomains sharing the same Insider One integration."
tags: ["web push in subdomains"]
updated: 2026-03-03T08:31:49Z
published: 2026-03-03T08:31:49Z
canonical: "academy.insiderone.com/web-push-notifications-in-subdomains"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://academy.insiderone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Web Push: Notifications in Subdomains

You can collect opt-ins and send [Web Push notifications](/docs/types-of-web-push-notifications) if you have multiple domains.

## Can multiple domains show only one opt-in window and use the same API for the same Web Push notification?

You can define multiple domains under a single panel, like *domainA.com* and *domainB.com*. If a user opts in to one of them, they will not see the opt-in permission screen again on other domains, and it will be counted as an opt-in across domains.

If you want to send different Web Push notifications for different domains, you can define different languages for each. For example, when sending a [Single Web Push](/docs/create-a-single-web-push) for all domains, you can choose the "All Languages" option in the Segments step so that all domains will receive the Web Push notification.

## How will opt-ins be collected with native opt-in integration?

You might have two subdomains, such as *www.mywebsite.com* & *store.mywebsite.com*, and the same Insider One API integration is applied to both domains. For [native opt-in](/docs/native-opt-in-configuration), Insider One's Service Worker (insider-sw-sdk.js) must be accessible both from *www.mywebsite.com/insider-sw-sdk.js* and *store.mywebsite.com/insider-sw-sdk.js*

Let's say Andrea saw the opt-in prompt while visiting the *store.mywebsite.com* domain and allowed it. When he visits *www.mywebsite.com*, Insider One won't display the opt-in again since he already subscribed to the main *mywebsite.com* domain. Norah saw the opt-in prompt while visiting the *www.mywebsite.com* domain and allowed it. Similarly, when she visits *store.mywebsite.com*, Insider One won't display the opt-in again since she already subscribed to the main *mywebsite.com* domain.

When you send Web Push notifications from the panel, Andrea and Norah will receive the same push; **the only difference** is that while John will see it coming from *store.mywebsite.com*, Norah will see it from *www.mywebsite.com*.