DuckDuckGo · AI answers
DuckAssistBot
Identify DuckAssistBot by its user agent. Check request identity, review robots.txt controls and track visits in Aiola Analytics.
Key facts
User-agent token:
DuckAssistBotAI answers: Fetched to answer a user's question now.
DuckDuckGo publishes official IP ranges; verify requests against them.
What DuckAssistBot is
DuckAssistBot crawls pages in real time for DuckDuckGo's cited AI-assisted answers; the content is not used to train AI models. DuckDuckGo documents the DuckAssistBot robots.txt token and says opt-outs take effect after 72 hours.
In Aiola's taxonomy, AI answers means fetched to answer a user's question now.
DuckAssistBot 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.
Full example User-Agent
DuckAssistBot/1.2; (+http://duckduckgo.com/duckassistbot.html)Case-insensitive match token
DuckAssistBotOfficial IP ranges
DuckDuckGo publishes an official IP range list. This cached snapshot contains 486 CIDR prefixes, last fetched 2026-10-23. Open the live source
Official IP range snapshot
104.43.54.127/32
104.43.55.116/32
104.43.55.117/32
104.43.55.166/32
104.43.55.167/32
108.141.83.74/32
128.203.132.152/32
128.203.181.79/32
128.203.214.241/32
128.203.236.110/32
128.203.82.154/32
13.86.35.212/32
13.89.106.77/32
13.90.178.139/32
130.107.228.224/32
131.145.39.118/32
131.189.183.241/32
132.164.209.198/32
132.196.106.146/32
132.220.1.71/32
134.33.207.189/32
135.171.251.169/32
135.233.63.237/32
135.234.221.112/32
135.235.183.95/32
172.168.115.250/32
172.168.12.93/32
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172.168.190.186/32
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20.100.136.36/32
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20.3.1.178/32
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20.43.150.85/32
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20.44.222.1/32
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20.79.226.26/32
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20.9.114.242/32
20.93.28.24/32
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20.99.154.113/32
20.99.255.235/32
4.144.148.23/32
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4.149.142.7/32
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4.154.193.167/32
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40.81.250.205/32
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40.88.21.235/32
40.89.243.175/32
48.192.16.86/32
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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
48.217.129.210/32
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48.223.209.110/32
51.104.144.31/32
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51.104.160.167/32
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51.104.180.26/32
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51.107.40.209/32
51.116.131.221/32
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51.143.114.45/32
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51.8.253.152/32
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52.142.24.149/32
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57.151.44.140/32
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57.165.205.172/32
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64.236.118.43/32
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68.219.152.220/32
72.144.95.185/32
74.163.169.106/32
74.163.208.206/32
74.179.200.126/32
74.179.232.116/32
74.242.194.48/32
98.70.219.37/32Verify a DuckAssistBot request
For DuckAssistBot, compare the source IP from your trusted edge or server against DuckDuckGo’s current published prefixes.
Test one CIDR in Python (replace REQUEST_IP)
python3 -c 'import ipaddress; print(ipaddress.ip_address("REQUEST_IP") in ipaddress.ip_network("104.43.54.127/32"))'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 DuckAssistBot with robots.txt
DuckDuckGo documents crawler controls for this bot family. Robots.txt can direct cooperative crawling, but it cannot prove that a request is authentic.
Allow DuckAssistBot
User-agent: DuckAssistBot
Allow: /Block DuckAssistBot
User-agent: DuckAssistBot
Disallow: /Aiola Analytics
See every DuckAssistBot visit on your site
Aiola tracks 70 AI, search and link-preview crawlers next to your human traffic. See when DuckAssistBot arrives, which pages it requests and how that changes over time. Hosted Analytics needs Pro or a trial.
Common questions
Build, ship and fix in one app
Errors, user feedback, GitHub and analytics live next to your coding agents in one desktop app. Every issue becomes a task an agent can take.