chatgpt.com
chatgpt.com is the ChatGPT website. Codex CLI can also use its backend when signed in with ChatGPT.
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
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 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
Checked on 3 November 2026.