DuckAssistBot: what it is, its IP ranges, and how to block it

It reads a page for an AI's search or for a person who asked an assistant, and can bring visitors. Bot Protection lets it through by default; you can block it.

How to verify it

Any bot can write DuckAssistBot in its User-Agent. A request is DuckAssistBot only when its address is in DuckDuckGo's published list below: check the address, not the name.

How to block it

With robots.txt, you ask it to stay out:

User-agent: DuckAssistBot
Disallow: /

robots.txt is a request, not a block, and it cannot tell the real crawler from a bot wearing its name. Bot Protection verifies DuckAssistBot by its address on every request and answers it as you choose on the Set-up page, per kind or for DuckAssistBot alone; a bot that only wears the name is judged like any other bot.

Its IP ranges

From DuckDuckGo's own list, downloaded again every day.

IPv4

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
172.168.133.76/32
172.168.137.102/32
172.168.152.88/32
172.168.173.230/32
172.168.190.186/32
172.168.227.120/32
172.168.254.119/32
172.168.43.43/32
172.168.51.216/32
172.168.53.53/32
172.168.81.217/32
172.168.94.160/32
172.169.164.109/32
172.169.17.165/32
172.169.177.131/32
172.169.181.237/32
172.169.28.184/32
172.169.36.43/32
172.169.53.208/32
172.169.60.134/32
172.169.7.33/32
172.169.93.148/32
172.171.37.221/32
172.179.105.87/32
172.179.128.118/32
172.188.250.220/32
172.189.40.18/32
172.193.184.42/32
172.193.197.146/32
172.193.245.229/32
172.194.141.49/32
172.199.55.212/32
172.210.111.68/32
191.233.3.197/32
191.233.3.202/32
191.234.216.178/32
191.234.216.4/32
191.235.201.214/32
191.235.202.38/32
191.235.202.48/32
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
20.113.14.159/32
20.113.3.121/32
20.115.181.187/32
20.118.11.251/32
20.119.127.146/32
20.12.141.99/32
20.12.249.123/32
20.12.252.21/32
20.121.75.32/32
20.13.44.19/32
20.15.142.178/32
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
20.191.44.119/32
20.191.44.16/32
20.191.44.22/32
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
20.195.108.47/32
20.195.58.189/32
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
20.204.242.101/32
20.204.242.19/32
20.204.243.55/32
20.204.246.254/32
20.204.246.81/32
20.207.107.181/32
20.207.117.66/32
20.207.72.11/32
20.207.72.110/32
20.207.72.113/32
20.207.72.21/32
20.207.97.190/32
20.207.99.197/32
20.212.139.34/32
20.212.90.107/32
20.216.200.223/32
20.219.43.246/32
20.219.45.190/32
20.219.45.67/32
20.221.10.115/32
20.221.84.185/32
20.226.133.105/32
20.23.88.231/32
20.231.254.179/32
20.232.249.95/32
20.232.51.46/32
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
20.236.40.93/32
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
20.252.16.193/32
20.252.41.18/32
20.252.63.162/32
20.252.88.10/32
20.252.9.6/32
20.253.114.51/32
20.253.59.76/32
20.253.96.199/32
20.29.149.44/32
20.29.154.56/32
20.3.1.178/32
20.3.60.212/32
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
20.50.168.91/32
20.50.48.159/32
20.50.48.192/32
20.50.49.0/32
20.50.49.237/32
20.50.49.25/32
20.50.49.40/32
20.50.49.55/32
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
20.50.50.46/32
20.53.134.160/32
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
20.54.224.39/32
20.56.197.58/32
20.56.197.63/32
20.59.0.65/32
20.61.142.192/32
20.61.34.40/32
20.62.224.44/32
20.64.185.45/32
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
20.69.74.250/32
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
20.72.242.209/32
20.72.242.93/32
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
20.8.252.26/32
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
20.9.114.242/32
20.93.28.24/32
20.93.49.96/32
20.99.154.113/32
20.99.255.235/32
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
4.149.159.102/32
4.149.159.71/32
4.149.216.220/32
4.150.142.218/32
4.154.193.167/32
4.156.136.79/32
4.156.154.107/32
4.156.30.123/32
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
40.114.182.153/32
40.114.182.172/32
40.114.182.45/32
40.114.183.196/32
40.114.183.251/32
40.114.183.88/32
40.119.232.146/32
40.119.232.215/32
40.119.232.218/32
40.119.232.251/32
40.119.232.50/32
40.121.121.54/32
40.127.154.196/32
40.64.105.247/32
40.64.106.11/32
40.64.106.152/32
40.64.67.220/32
40.64.78.45/32
40.64.88.145/32
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
40.76.163.23/32
40.76.163.7/32
40.76.173.151/32
40.81.250.205/32
40.82.218.203/32
40.88.195.62/32
40.88.21.235/32
40.89.243.175/32
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
48.217.129.210/32
48.217.212.89/32
48.217.23.236/32
48.223.209.110/32
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
51.104.167.104/32
51.104.167.110/32
51.104.167.19/32
51.104.167.52/32
51.104.167.54/32
51.104.167.61/32
51.104.167.71/32
51.104.167.87/32
51.104.167.88/32
51.104.167.95/32
51.104.167.96/32
51.104.180.26/32
51.104.180.47/32
51.104.180.53/32
51.107.40.209/32
51.116.131.221/32
51.120.48.122/32
51.138.90.161/32
51.138.90.206/32
51.138.90.233/32
51.143.114.45/32
51.145.185.16/32
51.8.253.152/32
51.8.31.28/32
51.8.71.117/32
52.142.24.149/32
52.142.26.175/32
52.143.241.111/32
52.143.242.6/32
52.143.243.117/32
52.143.244.81/32
52.143.247.235/32
52.143.95.162/32
52.143.95.204/32
52.146.57.51/32
52.146.58.236/32
52.146.59.12/32
52.146.59.154/32
52.146.59.156/32
52.146.63.80/32
52.148.161.87/32
52.148.165.38/32
52.149.25.43/32
52.149.28.18/32
52.149.28.83/32
52.149.30.45/32
52.149.56.151/32
52.149.58.139/32
52.149.58.173/32
52.149.58.27/32
52.149.58.69/32
52.149.60.38/32
52.149.61.51/32
52.154.169.200/32
52.154.169.50/32
52.154.170.113/32
52.154.170.117/32
52.154.170.122/32
52.154.170.209/32
52.154.170.229/32
52.154.170.243/32
52.154.170.26/32
52.154.170.28/32
52.154.170.88/32
52.154.170.96/32
52.154.171.0/32
52.154.171.150/32
52.154.171.196/32
52.154.171.205/32
52.154.171.235/32
52.154.171.250/32
52.154.171.44/32
52.154.171.70/32
52.154.171.87/32
52.154.172.2/32
52.154.204.93/32
52.154.60.82/32
52.185.93.208/32
52.186.37.211/32
52.188.89.106/32
52.189.70.103/32
52.190.37.160/32
52.191.222.158/32
52.191.82.242/32
52.224.147.21/32
52.224.16.221/32
52.224.16.229/32
52.224.19.152/32
52.224.191.245/32
52.224.20.174/32
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52.224.21.23/32
52.224.21.27/32
52.224.21.4/32
52.224.21.49/32
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52.224.21.61/32
52.242.224.168/32
52.250.46.221/32
57.151.44.140/32
57.152.17.237/32
57.152.62.107/32
57.152.72.128/32
57.155.18.44/32
57.165.205.172/32
57.167.88.38/32
64.236.118.43/32
64.236.15.33/32
64.236.93.100/32
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
98.70.219.37/32