Search crawler · user agent DuckDuckBot

DuckDuckBot IP addresses

DuckDuckBot is the crawler of the DuckDuckGo search engine.

IPv4 prefixes: 486
IPv6 prefixes: 0
IPv4 addresses: 486
Updated: 2026-10-01

Is this IP DuckDuckBot?

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

Download the list

Generated from the current official list.

Source: https://duckduckgo.com/duckduckbot.json · official documentation

All prefixes

Showing the first 300 of 486 prefixes; the full list loads with JavaScript and is in every download.

Prefix	Region	Service
4.144.148.23/32
4.144.182.50/32
4.144.227.142/32
4.144.251.39/32
4.149.142.7/32
4.149.159.71/32
4.149.159.102/32
4.149.216.220/32
4.150.142.218/32
4.154.193.167/32
4.156.30.123/32
4.156.136.79/32
4.156.154.107/32
4.157.77.76/32
4.172.49.103/32
4.177.16.196/32
4.182.10.198/32
4.182.131.108/32
4.195.133.120/32
4.201.125.59/32
4.201.141.71/32
4.201.197.203/32
4.201.206.133/32
4.201.220.8/32
4.207.220.92/32
4.209.224.56/32
4.213.46.14/32
4.226.40.135/32
4.228.76.163/32
4.237.155.54/32
4.237.244.80/32
4.242.119.13/32
4.246.10.252/32
4.248.234.26/32
4.249.216.104/32
4.249.223.51/32
4.249.238.11/32
4.254.123.56/32
4.255.35.121/32
4.255.39.80/32
13.86.35.212/32
13.89.106.77/32
13.90.178.139/32
20.3.1.178/32
20.3.60.212/32
20.8.252.26/32
20.9.114.242/32
20.12.141.99/32
20.12.249.123/32
20.12.252.21/32
20.13.44.19/32
20.15.142.178/32
20.23.88.231/32
20.29.149.44/32
20.29.154.56/32
20.40.133.240/32
20.40.147.172/32
20.43.150.85/32
20.43.150.93/32
20.43.152.28/32
20.43.172.120/32
20.44.222.1/32
20.49.129.236/32
20.49.136.28/32
20.50.48.159/32
20.50.48.192/32
20.50.49.0/32
20.50.49.25/32
20.50.49.40/32
20.50.49.55/32
20.50.49.237/32
20.50.50.46/32
20.50.50.118/32
20.50.50.121/32
20.50.50.123/32
20.50.50.130/32
20.50.50.134/32
20.50.50.145/32
20.50.50.146/32
20.50.50.163/32
20.50.168.91/32
20.53.78.106/32
20.53.78.123/32
20.53.78.138/32
20.53.78.144/32
20.53.78.236/32
20.53.91.2/32
20.53.92.211/32
20.53.134.160/32
20.54.224.39/32
20.56.197.58/32
20.56.197.63/32
20.59.0.65/32
20.61.34.40/32
20.61.142.192/32
20.62.224.44/32
20.64.185.45/32
20.69.74.250/32
20.69.129.205/32
20.69.131.45/32
20.69.138.149/32
20.69.138.189/32
20.69.144.137/32
20.69.146.171/32
20.69.147.21/32
20.69.171.204/32
20.71.12.143/32
20.71.69.210/32
20.72.197.110/32
20.72.203.250/32
20.72.218.29/32
20.72.221.33/32
20.72.221.45/32
20.72.225.13/32
20.72.242.93/32
20.72.242.209/32
20.73.132.240/32
20.73.202.147/32
20.75.144.152/32
20.75.254.61/32
20.77.146.108/32
20.79.226.26/32
20.79.238.198/32
20.79.239.66/32
20.80.114.203/32
20.80.120.41/32
20.80.129.80/32
20.80.135.7/32
20.80.156.88/32
20.81.115.13/32
20.82.24.207/32
20.84.138.61/32
20.84.219.45/32
20.84.251.223/32
20.85.138.75/32
20.85.167.56/32
20.85.187.146/32
20.88.168.65/32
20.93.28.24/32
20.93.49.96/32
20.99.154.113/32
20.99.255.235/32
20.100.136.36/32
20.100.140.155/32
20.101.17.173/32
20.102.34.205/32
20.109.129.162/32
20.109.130.190/32
20.109.241.18/32
20.112.58.44/32
20.113.3.121/32
20.113.14.159/32
20.115.181.187/32
20.118.11.251/32
20.119.127.146/32
20.121.75.32/32
20.166.171.150/32
20.170.75.54/32
20.175.232.228/32
20.185.79.15/32
20.185.79.47/32
20.190.21.172/32
20.191.44.16/32
20.191.44.22/32
20.191.44.119/32
20.191.44.234/32
20.191.45.212/32
20.193.12.126/32
20.193.24.10/32
20.193.24.251/32
20.193.25.197/32
20.193.27.215/32
20.193.45.113/32
20.195.58.189/32
20.195.108.47/32
20.197.209.11/32
20.197.209.27/32
20.198.132.126/32
20.198.152.208/32
20.201.15.208/32
20.204.228.200/32
20.204.240.172/32
20.204.241.148/32
20.204.242.19/32
20.204.242.101/32
20.204.243.55/32
20.204.246.81/32
20.204.246.254/32
20.207.72.11/32
20.207.72.21/32
20.207.72.110/32
20.207.72.113/32
20.207.97.190/32
20.207.99.197/32
20.207.107.181/32
20.207.117.66/32
20.212.90.107/32
20.212.139.34/32
20.216.200.223/32
20.219.43.246/32
20.219.45.67/32
20.219.45.190/32
20.221.10.115/32
20.221.84.185/32
20.226.133.105/32
20.231.254.179/32
20.232.51.46/32
20.232.249.95/32
20.236.40.93/32
20.236.195.196/32
20.236.198.192/32
20.236.227.113/32
20.236.233.23/32
20.236.247.180/32
20.237.1.51/32
20.241.135.19/32
20.241.147.151/32
20.241.153.203/32
20.241.164.5/32
20.241.241.100/32
20.242.133.53/32
20.242.135.165/32
20.242.211.139/32
20.242.215.53/32
20.242.237.240/32
20.246.132.168/32
20.246.225.34/32
20.247.235.11/32
20.250.51.113/32
20.252.9.6/32
20.252.16.193/32
20.252.41.18/32
20.252.63.162/32
20.252.88.10/32
20.253.59.76/32
20.253.96.199/32
20.253.114.51/32
40.64.67.220/32
40.64.78.45/32
40.64.88.145/32
40.64.105.247/32
40.64.106.11/32
40.64.106.152/32
40.65.78.86/32
40.76.162.17/32
40.76.162.191/32
40.76.162.208/32
40.76.162.247/32
40.76.163.7/32
40.76.163.23/32
40.76.173.151/32
40.81.250.205/32
40.82.218.203/32
40.88.21.235/32
40.88.195.62/32
40.89.243.175/32
40.114.182.45/32
40.114.182.153/32
40.114.182.172/32
40.114.183.88/32
40.114.183.196/32
40.114.183.251/32
40.119.232.50/32
40.119.232.146/32
40.119.232.215/32
40.119.232.218/32
40.119.232.251/32
40.121.121.54/32
40.127.154.196/32
48.192.16.86/32
48.192.74.178/32
48.200.33.227/32
48.202.155.200/32
48.202.171.124/32
48.204.32.87/32
48.206.18.152/32
48.217.23.236/32
48.217.129.210/32
48.217.212.89/32
48.223.209.110/32
51.8.31.28/32
51.8.71.117/32
51.8.253.152/32
51.104.144.31/32
51.104.146.225/32
51.104.146.235/32
51.104.160.167/32
51.104.160.177/32
51.104.161.32/32
51.104.162.149/32
51.104.163.250/32
51.104.164.109/32
51.104.164.147/32
51.104.164.189/32
51.104.164.215/32
51.104.166.111/32
51.104.167.19/32
51.104.167.52/32
51.104.167.54/32
51.104.167.61/32

Verifying DuckDuckBot

The user agent string DuckDuckBot 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 DuckDuckBot:

Check that the request IP is inside one of the prefixes above (the checker on this page does exactly that).
Load the list from the official 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.

Frequently asked questions

What are the IP ranges of DuckDuckBot?

DuckDuckBot publishes 486 IPv4 and 0 IPv6 prefixes (486 IPv4 addresses in total) in its official list at https://duckduckgo.com/duckduckbot.json. This page shows the current list and refreshes it from the source every 6 hours.

How do I verify that a request really comes from DuckDuckBot?

Anyone can send the user agent DuckDuckBot. Check that the IP address of the request is in the official 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 DuckDuckBot IP ranges change?

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

How do I allow only DuckDuckBot 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, location and data-center/VPN status of every IP address, so you can recognise cloud traffic and bots from any provider.

Get a free API key Read the docs

150 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": false, "is_tor": false, "threat_score": 0 }
  }
}