AI crawler · user agent OAI-SearchBot

OAI-SearchBot (OpenAI) IP addresses

OAI-SearchBot crawls pages so they can appear in ChatGPT search results. Blocking it removes your site from ChatGPT search answers.

OAI-SearchBot crawls pages so they can appear as cited sources in ChatGPT search. If you want to be referenced in ChatGPT answers, keep this agent unblocked in robots.txt and in your WAF. Verify it by IP here before exempting it from bot rules.

IPv4 prefixes: 39
IPv6 prefixes: 0
IPv4 addresses: 2,560
Updated: Oct 1, 2026

Is this IP OAI-SearchBot (OpenAI)?

Checks the address against the current list, in your browser.

Download the list

Generated from the current list.

Source: https://openai.com/searchbot.json · official documentation

All prefixes

The list as of Oct 1, 2026; the page loads the latest copy when it opens.

Prefix
4.227.36.0/25
13.66.216.176/28
20.14.99.96/28
20.25.151.224/28
20.42.10.176/28
20.168.18.32/28
20.169.6.224/28
20.169.7.48/28
20.169.77.0/25
20.171.53.224/28
20.171.123.64/28
23.102.145.48/28
40.67.175.0/25
40.90.214.16/28
51.8.102.0/24
74.7.175.128/25
74.7.228.0/25
74.7.228.128/25
74.7.229.0/25
74.7.229.128/25
74.7.230.0/25
74.7.241.128/25
74.7.242.128/25
74.7.243.0/25
74.7.244.0/25
104.210.140.128/28
135.234.64.0/24
172.182.193.80/28
172.182.193.224/28
172.182.194.32/28
172.182.194.144/28
172.182.195.48/28
172.182.209.208/28
172.182.211.192/28
172.182.213.192/28
172.182.224.0/28
172.203.190.80/28
172.203.190.112/28
172.203.190.128/28

Verifying OAI-SearchBot (OpenAI)

The user agent string OAI-SearchBot can be faked by anyone, and scrapers often pretend to be well-known bots to get past rate limits. Before you treat a request as OAI-SearchBot (OpenAI):

Check that the request IP is inside one of the prefixes above (the checker on this page does exactly that).
Load the list from its source on a schedule; do not hard-code it.
Allow the verified bot in your firewall or bot protection, and rate-limit or challenge requests that only claim to be it.

To control access, use robots.txt: User-agent: OAI-SearchBot followed by Disallow: / blocks the bot entirely; a path-specific Disallow excludes only parts of your site.

Frequently asked questions

What are the IP ranges of OAI-SearchBot (OpenAI)?

OAI-SearchBot (OpenAI) publishes 39 IPv4 and 0 IPv6 prefixes (2,560 IPv4 addresses in total) in its official list at https://openai.com/searchbot.json. This page shows the list as of Oct 1, 2026 and loads the latest copy when it opens.

How do I verify that a request really comes from OAI-SearchBot (OpenAI)?

Anyone can send the user agent OAI-SearchBot. Check that the IP address of the request is in the list (use the checker on this page), or do a reverse DNS lookup followed by a forward lookup, as described in the official documentation.

How often do the OAI-SearchBot (OpenAI) IP ranges change?

Providers add and remove ranges regularly, sometimes several times a week. Do not hard-code the list: load it from its source (or this page's JSON) on a schedule, for example daily.

How do I allow only OAI-SearchBot (OpenAI) in nginx?

Download the nginx format on this page and include it in a location block: one 'allow' line per prefix followed by 'deny all;'. Regenerate the file regularly, because the list changes.

IP geolocation API

Know who is behind any IP

Beyond published lists, the ipbase API tells you the owner, ASN and location of every IP address, and on the Medium plan and above its data-center and VPN status, so you can recognise cloud traffic and bots from any provider.

Read the documentation

1,000 free requests every month. No credit card required.

GET https://api.ipbase.com/v2/info?ip=1.1.1.1

{
  "data": {
    "ip": "1.1.1.1",
    "type": "v4",
    "connection": {
      "asn": 13335,
      "organization": "APNIC and Cloudflare DNS Resolver project",
      "isp": "Cloudflare, Inc",
      "range": "1.1.1.0/24"
    },
    "location": {
      "country": { "alpha2": "AU", "name": "Australia" },
      "zip": "4000"
    },
    "security": { "is_vpn": null, "is_tor": null, "threat_score": null }
  }
}