OpenAI

OpenAI publishes IP prefix lists for GPTBot, OAI-SearchBot, and ChatGPT-User at openai.com (gptbot.json, searchbot.json, chatgpt-user.json). Those feeds are authoritative for allowlisting.

Autonomous systems

BGP & cloud context

Published prefix lists are authoritative for each bot product; WHOIS may still show Azure or other cloud ASNs. Combine published prefixes with rDNS and OpenAI’s docs.

Third-party hosting & clouds

Microsoft Azure

AS8075 AS12076

Common Azure ASNs; align enforcement with OpenAI’s published prefix list.

GPTBot Official feed

Official sources

https://openai.com/gptbot.json

OAI-SearchBot Official feed

Official sources

https://openai.com/searchbot.json

ChatGPT-User Official feed

Official sources

https://openai.com/chatgpt-user.json

Documentation

OpenAI - bots documentation