*** Let's Encrypt validation server IP addresses ***
Updated:  11/9/'25, 1/9/'26, 3/10/'26, 5/10/'26


     IP           Cloud                   Date
------------   ------------               ------------------------
3.0.50.154     Amazon Tech SG             5/14/'24
3.0.181.204    Amazon Data Services SG    7/11/'25
3.1.176.57     Amazon Data Services SG    1/9/'26
3.14.3.69      Amazon Tech                5/13/'24
3.14.255.131   Amazon Tech                
3.14.255.232   Amazon Tech                10/27/'23
3.15.160.194   Amazon Techm               5/9/'26
3.16.112.82    Amazon Tech                
3.16.213.50    Amazon Tech                10/29/'23
3.17.71.143    Amazon Tech                
3.19.55.121    Amazon Tech                
3.19.56.43     Amazon Tech                
3.19.120.239   Amazon Tech                
3.20.206.24    Amazon Tech                3/17/'23
3.21.39.207    Amazon Tech                
3.21.43.5      Amazon Tech                
3.21.185.231   Amazon Tech                
3.22.66.161    Amazon Tech                
3.22.70.135    Amazon Tech                
3.22.187.24    Amazon Tech                
3.64.250.53    Amazon Tech                
3.64.251.85    Amazon Tech                
3.66.29.156    Amazon Tech                
3.67.34.92     Amazon Tech                
3.68.27.193    Amazon Tech                
3.68.183.249   Amazon Tech                
3.69.19.58     Amazon Tech                
3.69.24.161    Amazon Tech                
3.69.165.224   Amazon Tech                
3.69.241.162   Amazon Tech                
3.70.173.52    Amazon Tech                
3.70.173.240   Amazon Tech                
3.70.205.7     Amazon Tech                
3.70.226.171   Amazon Tech                
3.72.0.27      Amazon Tech                
3.72.51.68     Amazon Tech                
3.72.73.233    Amazon Tech                
3.73.52.92     Amazon Tech                
3.73.159.42    Amazon Tech                
3.74.164.89    Amazon Tech                
3.120.130.29   Amazon Tech                
3.121.212.136  Amazon Tech                
3.122.178.200  Amazon Tech                
3.123.37.118   Amazon Tech                
3.124.187.251  Amazon Tech                
3.125.19.113   Amazon Tech                
3.128.26.105   Amazon Tech                
3.131.36.184   Amazon Tech                
3.133.99.173   Amazon Tech                
3.133.109.33   Amazon Tech                1/9/'26
3.134.86.26    Amazon Tech                
3.135.201.96   Amazon Tech                
3.136.27.87    Amazon Tech                
3.137.151.20   Amazon Tech                3/12/'25
3.137.173.92   Amazon Tech                5/10/'26
3.138.192.33   Amazon Tech                9/10/'25
3.140.192.187  Amazon Tech                10/29/'23
3.140.247.33   Amazon Tech                
3.140.247.189  Amazon Tech                1/9/'26
3.141.42.59    Amazon Tech                
3.141.201.55   Amezon Tech                1/11/'25
3.142.122.14   Amazon Tech                
3.143.0.179    Amazon Tech                11/09/'25
3.143.169.11   Amazon Tech                5/9/'26
3.143.170.124  Amazon Tech                5/12/'25
3.143.204.187  Amazon Tech                
3.143.223.150  Amazon Tech                
3.143.233.9    Amazon Tech                1/15/'23
3.143.254.60   Amazon Tech                
3.144.10.135   Amazon Tech                10/19/'23
3.144.34.165   Amazon Tech                
3.144.45.104   Amazon Tech                5/9/'26
3.144.75.81    Amazon Tech                
3.144.116.248  Amazon Tech                9/10/'25
3.144.218.183  Amazon Tech                
3.145.37.14    Amazon Tech                7/15/'23
3.145.96.244   Amazon Tech                
3.145.191.206  Amazon Tech                
3.147.77.110   Amazon Tech                9/10/'25
3.149.254.206  Amazon Tech                5/9/'26
13.48.59.52    Amazon Data Services SE    7/11/'25
13.48.129.186  Amazon Data Services SE    9/10/'25
13.49.46.214   Amazon Data Services SE    5/13/'24
13.50.15.224   Amazon Data Services SE    5/14/'24
13.50.236.71   Amazon Data Services SE    1/9/'26
13.50.245.224  Amazon Data Services SE    1/9/'26
13.51.233.154  Amazon Data Services SE    5/9/'26
13.51.235.68   Amazon Data Services SE    9/12/'24
13.53.124.220  Amazon Data Services SE    5/13/'24
13.53.207.238  Amazon Data Services SE    1/11/'25
13.58.30.69    Amazon Tech                4/10/'23
13.59.153.150  Amazon Tech                
13.60.23.140   Amazon Data Services SE    9/10/'25
13.60.34.172   Amazon SE                  5/12/'25
13.60.93.245   Amazon SE                  9/10/'25
13.60.157.246  Amazon Sweden              9/12/'24
13.60.183.193  Amazon Sweden              9/12/'24
13.60.194.24   Amazon Sweden              9/12/'24
13.61.7.50     Amazon Data Services SE    5/12/'25
13.61.18.121   Amazon Data Services SE    11/09/'25
13.63.45.133   Amazon Data Services SE    5/9/'26
13.212.73.241  Amazon Data Services SE    9/12/'24
13.212.250.197 Amazon Data Services SE    1/11/'25
13.213.12.154  Amazon Data Services SG    5/9/'26
13.214.170.141 Amazon Data Services SG    5/23/'24
13.215.156.112 Amazon Data Services SG    5/9/'26
13.229.155.75  Amazon Data Services SG    5/13/'24
13.250.3.247   Amazon Data Services SG    5/14/'24
13.250.17.71   Amazon Data Services SG    3/12/'25
13.250.106.177 Amazon Data Services SG    9/10/'25
13.250.172.89  Amazon Data Services SG    7/13/'24
13.251.16.211  Amazon Data Services SG    9/10/'25
16.16.66.120   Amazon Data Services SE    3/12/'25
16.16.122.56   Amazon Data Services SE    5/10/'26
16.16.192.56   Amazon Data Services SE    5/14/'24
16.16.192.69   Amazon Data Services SE    9/12/'24
16.146.19.122  Amazon.com                 5/9/'26
16.170.15.68   Amazon Data Services SE    5/9/'26
16.170.221.52  Amazon Data Services SE    1/9/'26
16.170.243.111 Amazon Data Services SE    5/9/'26
16.171.1.246   Amazon Data Services SE    5/14/'24
16.171.3.40    Amazon Data Services SE    7/13/'24
16.171.170.178 Amazon Data Services SE    11/09/'25
18.116.13.211  Amazon Tech                
18.116.86.117  Amazon Tech                
18.116.165.193 Amazon Tech                
18.116.237.27  Amazon Tech                5/16/'23
18.117.119.45  Amazon Tech                7/13/'24
18.117.185.176 Amazon Tech                5/14/'24
18.117.191.69  Amazon Tech                5/12/'25
18.118.160.177 Amazon Tech                
18.118.252.192 Amazon Tech                9/12/'24
18.136.101.23  Amazon SG                  5/12/'25
18.141.8.137   Amazon Tech                5/14/'24
18.143.133.155 Amazon Data Services SG    3/10/'26           
18.143.155.171 Amazon Data Services SG    1/9/'26
18.156.79.179  Amazon Tech                
18.159.141.56  Amazon Tech                
18.159.196.172 Amazon Tech                
18.184.29.122  Amazon Tech                
18.184.114.154 Amazon Tech                
18.184.220.107 Amazon Tech                
18.185.102.79  Amazon Tech                
18.185.104.214 Amazon Tech                
18.185.121.82  Amazon Tech                
18.188.88.18   Amazon Tech                
18.188.198.179 Amazon Tech                10/29/'23
18.188.201.12  Amazon Tech                7/11/'25
18.191.148.0   Amazon Tech                10/29/'23
18.192.23.35   Amazon Tech                
18.192.36.99   Amazon Tech                
18.192.55.112  Amazon Tech                
18.192.99.12   Amazon Tech                
18.192.245.0   Amazon Tech                
18.194.58.132  Amazon Tech                
18.194.90.174  Amazon Tech                
18.196.96.172  Amazon Tech                
18.196.102.134 Amazon Tech                
18.197.70.37   Amazon Tech                
18.197.97.115  Amazon Tech                
18.197.129.178 Amazon Tech                
18.216.77.148  Amazon Tech                
18.217.125.26  Amazon Tech                
18.217.198.241 Amazon Tech                
18.218.118.23  Amazon Tech                5/9/'26
18.218.154.93  Amazon Tech                1/9/'26
18.218.241.32  Amazon Tech                3/10/'26
18.219.62.63   Amazon Tech                9/12/'24
18.219.129.43  Amazon Tech                9/14/'23
18.219.221.239 Amazon Tech                
18.220.14.254  Amazon Tech                11/13/'23
18.220.25.215  Amazon Tech                
18.220.192.183 Amazon Tech                
18.221.77.37   Amazon Tech                
18.222.105.102 Amazon Tech                
18.222.132.50  Amazon Tech                9/10/'25
18.222.134.135 Amazon Tech                
18.222.145.89  Amazon Tech                
18.222.187.65  Amazon Tech                
18.222.194.125 Amazon Teck                11/09/'25
18.223.206.237 Amazon Tech                1/13/'24
18.224.20.83   Amazon Tech                
18.224.37.69   Amazon Tech                
18.225.32.50   Amazon Tech                
18.225.195.39  Amazon Tech                11/12/'24
18.236.144.238 Amazon Tech                
18.236.188.173 Amazon Tech                
18.236.228.243 Amazon Tech                
18.249.169.135 Amazon Tech                1/11/'25
23.178.112.100 Internet Security Research 11/12/'24
23.178.112.102 Internet Security Research 10/29/'23
23.178.112.103 Internet Security Research 10/19/'23, 10/27/'23, 7/11/'25 9/10/'25
23.178.112.104 Internet Security Research 10/29/'23, 9/12/'24 3/12/'25 9/10/'25 5/9/'26
23.178.112.105 Internet Security Research 5/12/'25, 12/09/'25 5/10/'26
23.178.112.106 Internet Security Research 3/17/'23, 10/19/'23, 10/27/'23, 10/29/'23 1/11/'25, 12/09/'25 5/9/'26
23.178.112.107 Internet Security Research 5/16/'23, 7/15/'23, 10/19/'23, 10/29/'23, 11/13/'23, 1/13/'24, 9/12/'24 5/10/'26
23.178.112.108 Internet Security Research 10/27/'23 3/10/'26
23.178.112.109 Internet Security Research 3/13/'24, 5/13/'24, 9/12/'24
23.178.112.200 Internet Security Research 10/27/'23
23.178.112.202 Internet Security Research 10/19/'23, 10/27/'23, 10/29/'23
23.178.112.203 Internet Security Research 10/27/'23, 10/27/'23, 10/29/'23
23.178.112.205 Internet Security Research 5/13/'24
23.178.112.208 Internet Security Research 10/19/'23, 10/27/'23
23.178.112.209 Internet Security Research 9/14/'23, 10/19/'23, 10/29/'23
23.178.112.210 Internet Security Research 9/10/'25, 11/09/'25
23.178.112.211 Internet Security Research 9/12/'24, 12/09/'25 5/10/'26
23.178.112.212 Internet Security Research 1/11/'25, 9/10/'25, 12/09/'25, 1/9/'26
23.178.112.213 Internet Security Research 11/09/'25 5/9/'26
23.178.112.215 Internet Security Research 7/13/'24, 5/12/'25
23.178.112.219 Internet Security Research 9/12/'24 1/9/'26 5/9/'26
34.209.154.109 Amazon Tech                3/12/'25
34.209.191.57  Amazon Tech                
34.209.232.166 Amazon Tech                
34.211.6.84    Amazon Tech                
34.211.11.88   Amazon Tech                
34.211.60.134  Amazon Tech
34.213.29.66   Amazon Tech                9/10/'25
34.213.106.112 Amazon Tech                4/10/'23
34.215.79.212  Amazon Tech                9/10/'25
34.215.121.14  Amazon Tech                
34.216.130.13  Amazon Tech                
34.216.192.11  Amazon Tech                
34.217.107.185 Amazon Tech                
34.218.205.49  Amazon Tech                11/13/'23
34.219.87.132  Amazon Tech                
34.219.101.95  Amazon Tech                10/29/'23
34.219.195.117 Amazon Tech                10/19/'23
34.220.82.248  Amazon Tech                
34.220.122.109 Amazon Tech                10/29/'23
34.220.126.78  Amazon Tech                
34.220.129.39  Amazon Tech                
34.220.210.147 Amazon Tech                5/12/'25
34.221.5.200   Amazon Tech                7/13/'24
34.221.143.127 Amazon Tech                
34.221.186.243 Amazon Tech                
34.221.255.206 Amazon Tech                
34.222.98.48   Amazon Tech                
34.222.119.160 Amazon Tech                5/13/'24
34.222.229.130 Amazon Tech                
34.222.237.95  Amazon Tech                
35.86.109.49   Amazon.com                 
35.86.125.186  Amazon.com                 3/13/'24
35.86.155.247  Amazon.com                 11/11/'25
35.86.160.6    Amazon.com                 
35.87.22.55    Amazon.com                 
35.87.22.7     Amazon.com                 1/9/'26
35.87.132.237  Amazon.com                 
35.87.154.18   Amazon.com                 
35.89.57.200   Amazon.com                 3/17/'23
35.89.74.29    Amazon.com                 
35.90.9.128    Amazon.com                 
35.90.113.149  Amazon.com                 10/27/'23
35.90.180.100  Amazon.com                 7/15/'23
35.92.87.236   Amazon.com                 
35.92.212.138  Amazon.com                 5/16/'23
35.92.222.63   Amazon.com                 1/15/'23
35.157.61.61   A100 ROW GmbH              
35.160.248.88  Amazon.com                 
35.161.21.117  Amazon.com                 
35.162.128.218 Amazon.com                 
35.163.64.218  Amazon.com                 
35.166.54.218  Amazon.com                 9/10/'25
35.166.77.114  Amazon EC2                 5/14/'24
44.249.178.168 Amazon.com                 9/10/'25
44.250.177.252 Amazon.com                 1/9/'26
47.129.30.65   Amazon Data Services SG    5/9/'26
47.129.104.176 Amazon Data Services SG    5/9/'26
47.129.124.162 Amazon Data Services SG    1/11/'25
47.129.133.204 Amazon Data Services SG    5/10/'26
47.129.174.36  Amazon Data Services SG    5/10/'26
47.129.194.245 Amazon Data Services SG    5/12/'25
47.129.221.84  Amazon Data Services SG    9/12/'24
47.129.237.42  Amazon Data Services SG    1/9/'26
51.20.63.129   Amazon EC2, DE             11/12/'24
51.20.71.195   A100                       5/14/'24
51.20.119.36   EC2                        3/10/'26
51.20.126.8    Amazon EC2                 9/10/'25
52.13.103.75   Amazon Tech                
52.13.40.34    Amazon Tech                1/11/'25
52.15.87.53    Amazon Tech                
52.15.254.228  Amazon Tech                
52.24.73.83    Amazon Tech                
52.25.122.42   Amazon Tech                
52.25.138.85   Amazon Tech  
52.26.214.19   Amazon Tech                5/9/'26
52.27.246.46   Amazon Tech                10/19/'23
52.28.236.88   Amazon Tech
52.29.173.72   A100 ROW GmbH              4/10/'23
52.33.189.219  Amazon Tech                
52.38.132.134  Amazon Tech                7/11/'25
52.39.4.59     Amazon Tech                
52.41.228.68   Amazon Tech                
52.58.118.98   Amazon Tech                
52.58.148.172  Amazon Tech                
52.59.65.64    Amazon Tech                
54.93.194.3    A100 ROW GmbH              
54.93.218.87   A100 ROW GmbH              
54.169.6.251   Amazon Tech                5/9/'26
54.169.207.183 Amazon Tech                9/10/'25
54.184.23.186  Amazon.com                 
54.185.185.210 Amazon.com                 
54.186.200.191 Amazon.com                 
54.189.22.122  Amazon.com                 
54.190.55.114  Amazon.com                 
54.191.60.25   Amazon.com                 
54.191.124.186 Amazon.com                 5/13/'24
54.191.192.47  Amazon.com                 
54.201.68.233  Amazon.com                 5/10/'26
54.201.106.94  Amazon.com                 
54.201.251.93  Amazon.com                 
54.202.174.126 Amazon.com                 
54.213.165.20  Amazon.com                 
54.213.166.159 Amazon.com                 11/09/'25
54.213.229.162 Amazon.com                 
54.214.125.224 Amazon.com                 9/12/'24
54.214.184.76  Amazon.com                 
54.244.40.45   Amazon.com                 
54.244.215.241 Amazon.com                 5/10/'26
54.245.176.12  Amazon.com                 
54.254.174.89  Amazon EC2                 5/14/'24
54.255.138.114 Amazon Data Services JP    11/09/'25
64.78.149.164  Flexential Colorado        
66.133.109.36  Flexential Colorado        4/10/'23
172.65.32.248  Cloudflare, Inc.           1/15/'23
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