---
title: "chatgpt.com: why your Mac connects and what blocking it affects · Kilobat"
url: "https://kilobat.app/hosts/chatgpt-com"
description: "Why ChatGPT and Codex connect to chatgpt.com, what the address means, and what blocking the host can interrupt."
---

# chatgpt.com

`chatgpt.com` is the ChatGPT website. Codex CLI can also use its backend when signed in with ChatGPT.

Run by OpenAI · Ports: 443 TCP · Checked: 3 November 2026

## Short answer

OpenAI's ChatGPT website and a backend used by Codex when signed in with ChatGPT.

Block with care

Blocking this host can interrupt ChatGPT and Codex sessions that use it.

Matches

`chatgpt.com`

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

## What it serves

OpenAI describes Codex as an agent that can work with code through several interfaces, including the CLI and desktop app.

When Codex CLI uses a ChatGPT login, OpenAI documents a backend endpoint on this host.

A connection to this host identifies the destination, but does not reveal the contents of encrypted traffic.

The IP address can belong to a network provider rather than OpenAI itself. IP addresses and routes can change.

## Processes that use it

- [Codex](https://kilobat.app/processes/codex): OpenAI's coding agent, available as a desktop app, command-line tool and other interfaces.

## What breaks if you block it

Block with care

Blocking this host can interrupt ChatGPT and Codex sessions that use it.

What breaks if you block it

- ChatGPT may not load or work normally.
- Codex requests using a ChatGPT sign-in may fail.

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.

## Notes

Other apps may also connect here. A domain name alone does not identify which local process initiated a connection.

Blocking a host is different from pausing an individual task or signing out.

## Sources

- [OpenAI: Unrolling the Codex agent loop](https://openai.com/index/unrolling-the-codex-agent-loop/)
- [OpenAI: Unlocking the Codex harness](https://openai.com/index/unlocking-the-codex-harness/)

Checked on 3 November 2026.