---
title: "metrics.icloud.com: what it is and what breaks if you block it · Kilobat"
url: "https://kilobat.app/hosts/metrics-icloud-com"
description: "metrics.icloud.com is the Apple host for iCloud device diagnostics. What Apple documents about it, and what blocking it affects."
---

Diagnostics, analytics and ads

# metrics.icloud.com

`metrics.icloud.com` is the Apple host for iCloud device diagnostics. Apple lists it for every platform, on port 443 over TCP and UDP.

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

## Short answer

Apple's host for iCloud device diagnostics.

Block with care

Blocking it stops iCloud device diagnostics from reaching Apple. Apple doesn't document whether iCloud services depend on it.

Matches

`metrics.icloud.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 `metrics.icloud.com` in its iCloud section, for iCloud device diagnostics, with proxy support. Apple added it in January 2026.

Apple doesn't say what the diagnostics contain, or whether they depend on the Share Mac Analytics setting.

For the analytics that you choose to share, see [`analyticsd`](https://kilobat.app/processes/analyticsd).

## What breaks if you block it

Block with care

Blocking it stops iCloud device diagnostics from reaching Apple. Apple doesn't document whether iCloud services depend on it.

What breaks if you block it

- iCloud device diagnostics can't reach Apple. Apple doesn't document other effects.

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: Share analytics information from your Mac with Apple](https://support.apple.com/guide/mac-help/share-analytics-information-mac-mh27990/mac)

Checked on 1 November 2026.

## Related

- [probe.icloud.com](https://kilobat.app/hosts/probe-icloud-com): Apple's iCloud connection testing hosts.
- [diagassets.apple.com](https://kilobat.app/hosts/diagassets-apple-com): The Apple host that devices use for diagnostics that help detect possible hardware issues.