---
title: "diagassets.apple.com: what it is and what breaks if you block it · Kilobat"
url: "https://kilobat.app/hosts/diagassets-apple-com"
description: "diagassets.apple.com is used by Apple devices to help detect possible hardware issues. What Apple says about it, and what breaks if you block it."
---

Diagnostics, analytics and ads

# diagassets.apple.com

`diagassets.apple.com` is the Apple host that Apple lists for diagnostics. Apple says that devices might access it to help detect a possible hardware issue.

Run by Apple · Ports: 443 TCP · Checked: 1 November 2026

## Short answer

The Apple host that devices use for diagnostics that help detect possible hardware issues.

Block with care

Blocking it may stop hardware diagnostics that need Apple's servers. Nothing else documented depends on it.

Matches

`diagassets.apple.com`

A name with `*.` covers every name under it: `*.push.apple.com` matches `1-courier.push.apple.com`.

## What it serves

Apple's enterprise host list names `diagassets.apple.com` in its Apple diagnostics section, on port 443, with proxy support, for every platform.

Apple's description is “Used by Apple devices to help detect possible hardware issues”.

This is hardware diagnostics, not the analytics you choose to share. Those are under [`analyticsd`](https://kilobat.app/processes/analyticsd) and [`SubmitDiagInfo`](https://kilobat.app/processes/reportcrash).

## What breaks if you block it

Block with care

Blocking it may stop hardware diagnostics that need Apple's servers. Nothing else documented depends on it.

What breaks if you block it

- Diagnostics that check for hardware issues may fail to run or to finish.

With Kilobat Pro and the network filter, you can block a host for every app or for one app: in Connections, select a connection and choose Block. Apple’s own services are never blocked by Kilobat’s [Protection](https://kilobat.app/docs/blocking#protection) lists.

## Apple’s rules for its hosts

Apple’s list, [Use Apple products on enterprise networks](https://support.apple.com/en-us/101555), says that devices open these connections, not Apple’s servers. Apple services fail any connection that uses HTTPS interception, so a proxy that inspects TLS should leave Apple’s hosts alone.

If a firewall allows hosts by name, allowing `*.apple.com` covers most Apple services, Apple says. A firewall that works only with addresses can allow `17.0.0.0/8` for IPv4, and `2403:300::/32`, `2620:149::/32` and `2a01:b740::/32` for IPv6.

To see which app on your Mac opened a connection to this host, use Kilobat’s Connections tab, or the [agent network log](https://kilobat.app/docs/agents#agent-network-log) for AI agents.

## Sources

- [Apple Support: Use Apple products on enterprise networks](https://support.apple.com/en-us/101555)
- [Apple Support: Use Apple Diagnostics to test your Mac](https://support.apple.com/en-us/102550)

Checked on 1 November 2026.

## Related

- [metrics.icloud.com](https://kilobat.app/hosts/metrics-icloud-com): Apple's host for iCloud device diagnostics.