OpenAI · AI answers
ChatGPT-User
Identify ChatGPT-User by its user agent. Check request identity, review robots.txt controls and track visits in Aiola Analytics.
Key facts
ChatGPT-UserWhat ChatGPT-User is
ChatGPT-User fetches a page after a person asks ChatGPT to visit or summarize it; it is not the automated training crawler. Aiola classifies it as AI answers because access happens on demand.
In Aiola's taxonomy, AI answers means fetched to answer a user's question now.
ChatGPT-User user agent
Look for the match token inside the complete HTTP User-Agent header. Tokens can be spoofed, so use the network checks below for authentication.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/botChatGPT-UserOfficial IP ranges
OpenAI publishes an official IP range list. This cached snapshot contains 234 CIDR prefixes, last fetched 2026-10-23. Open the live source
104.208.184.192/28
104.210.139.192/28
104.210.139.224/28
128.85.198.32/28
13.65.138.112/28
13.67.72.16/28
13.71.2.208/28
13.76.116.80/28
13.76.32.208/28
13.83.167.128/28
13.83.237.176/28
132.196.82.48/28
134.138.52.128/28
134.138.52.16/28
134.138.52.64/28
134.138.52.96/28
134.138.57.176/28
134.138.57.64/28
134.138.57.80/28
134.138.58.32/28
134.149.233.80/28
134.33.102.192/28
135.116.136.160/28
135.13.64.240/28
135.220.73.208/28
135.220.73.240/28
135.237.131.208/28
135.237.133.48/28
137.135.191.176/28
138.91.46.96/28
145.132.136.96/28
158.158.5.32/28
168.63.252.240/28
172.162.248.64/28
172.170.1.80/28
172.170.225.0/28
172.170.241.80/28
172.172.206.48/28
172.175.152.224/28
172.178.140.144/28
172.178.141.112/28
172.178.141.128/28
172.183.143.224/28
172.183.222.128/28
172.192.112.208/28
172.197.160.192/28
172.197.203.16/28
172.198.161.128/28
172.198.58.176/28
172.198.78.192/28
172.198.79.112/28
172.199.137.80/28
172.204.28.224/28
172.204.96.80/28
172.205.189.192/28
172.206.38.240/28
172.207.1.32/28
172.212.172.160/28
172.215.215.32/28
191.232.238.96/28
191.233.197.0/28
191.233.199.160/28
191.234.167.144/28
191.235.99.160/28
191.237.249.64/28
20.102.212.144/28
20.113.211.112/28
20.113.225.112/28
20.125.112.224/28
20.125.144.144/28
20.161.75.208/28
20.168.7.192/28
20.169.73.32/28
20.169.73.64/28
20.169.78.128/28
20.169.78.160/28
20.169.78.192/28
20.169.78.48/28
20.169.78.64/28
20.169.86.224/28
20.169.86.240/28
20.170.184.16/28
20.170.184.32/28
20.170.184.48/28
20.170.184.64/28
20.170.184.80/28
20.172.29.32/28
20.199.211.160/28
20.199.242.0/28
20.200.212.240/28
20.206.101.192/28
20.210.211.192/28
20.212.62.208/28
20.215.187.208/28
20.215.219.128/28
20.215.219.160/28
20.215.219.208/28
20.218.30.240/28
20.219.161.192/28
20.219.184.96/28
20.219.71.192/28
20.222.36.192/28
20.227.140.32/28
20.228.106.176/28
20.235.87.224/28
20.249.63.208/28
20.250.136.64/28
20.250.6.128/28
20.254.201.208/28
20.45.178.144/28
20.55.229.144/28
20.57.199.192/28
20.63.180.96/28
20.63.221.64/28
20.78.130.48/28
20.83.243.176/28
20.98.18.80/28
23.101.217.176/28
23.102.140.144/28
23.102.141.32/28
23.98.142.176/28
23.98.186.176/28
23.98.186.192/28
23.98.186.64/28
23.98.186.96/28
4.151.119.48/28
4.151.71.176/28
4.189.118.208/28
4.189.119.48/28
4.197.115.112/28
4.197.22.112/28
4.197.64.0/28
4.197.64.16/28
4.197.64.48/28
4.197.64.64/28
4.201.232.64/28
4.205.128.176/28
4.218.24.64/28
4.226.200.16/28
4.226.226.32/28
40.116.73.208/28
40.119.36.240/28
40.124.161.0/28
40.74.200.208/28
40.81.234.144/28
40.81.67.96/28
40.84.221.208/28
40.84.221.224/28
48.221.184.80/28
48.221.184.96/28
48.221.40.176/28
51.116.2.80/28
51.116.221.96/28
51.57.0.96/28
51.59.24.64/28
51.59.24.80/28
51.59.48.80/28
51.8.155.112/28
51.8.155.48/28
52.148.129.32/28
52.156.77.144/28
52.159.227.32/28
52.159.249.96/28
52.161.49.96/28
52.165.212.48/28
52.172.129.160/28
52.173.219.112/28
52.173.219.96/28
52.173.221.16/28
52.173.221.176/28
52.173.221.208/28
52.173.234.16/28
52.173.234.80/28
52.183.217.240/28
52.190.137.144/28
52.190.137.16/28
52.190.139.48/28
52.190.142.64/28
52.190.190.16/28
52.190.251.112/28
52.225.75.208/28
52.231.30.48/28
52.231.34.176/28
52.231.39.144/28
52.231.50.64/28
52.236.94.144/28
52.241.146.208/28
52.242.132.224/28
52.242.132.240/28
52.255.109.144/28
52.255.109.80/28
52.255.109.96/28
52.255.111.0/28
52.255.111.80/28
57.154.174.112/28
57.154.175.0/28
57.154.187.32/28
68.154.28.96/28
68.220.57.64/28
70.153.189.192/28
70.153.32.16/28
70.153.32.32/28
70.153.87.224/28
70.156.152.96/28
74.161.200.96/28
74.224.217.64/28
74.226.253.160/28
74.248.37.160/28
74.7.35.112/28
74.7.35.48/28
74.7.36.64/28
74.7.36.80/28
74.7.36.96/28
85.211.128.16/28
85.211.128.32/28
9.129.0.0/16
9.160.128.16/28
9.160.128.64/28
9.160.163.128/28
9.160.34.144/28
9.160.36.16/28
9.160.96.16/28
9.163.101.48/28
9.205.128.32/28
9.205.128.48/28
9.205.25.128/28
9.205.30.128/28
9.205.30.144/28
9.205.30.176/28
9.205.8.48/28
9.205.8.64/28
9.223.181.208/28
9.234.96.192/28
9.234.97.96/28Verify a ChatGPT-User request
For ChatGPT-User, compare the source IP from your trusted edge or server against OpenAI’s current published prefixes.
python3 -c 'import ipaddress; print(ipaddress.ip_address("REQUEST_IP") in ipaddress.ip_network("104.208.184.192/28"))'Test every current prefix in the vendor feed and re-fetch it regularly. This cached snapshot is evidence of publication, not a permanent firewall list.
Control ChatGPT-User with robots.txt
ChatGPT-User is user-triggered. OpenAI's controls may differ from automated crawling, so do not assume a robots.txt block is an authentication boundary.
User-agent: ChatGPT-User
Allow: /User-agent: ChatGPT-User
Disallow: /Aiola Analytics
See every ChatGPT-User visit on your site
Aiola tracks 70 AI, search and link-preview crawlers next to your human traffic. See when ChatGPT-User arrives, which pages it requests and how that changes over time. Hosted Analytics needs Pro or a trial.
Common questions
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