Help Center
If your app stays in a "connecting" mode or has timed out due to Network error, please try again or Can't connect to our service, please check your network connection and try again issues, it could be related to your network connection, network firewall settings, or web security gateway settings.
Note: Check your network connection by opening a browser and ensure that you can access https://zoom.us
This article covers:
Zoom firewall rules
To configure your network firewall, please see the following table. The following rules should be applied to outbound traffic. Zoom will communicate to the destination port received when the client makes its connection. The firewall should be configured to allow these return connections.
| Protocol | Ports | Source | Destination |
| TCP | 80,443 | All Zoom clients | *.zoom.us |
| TCP | 443, 8801, 8802 | All Zoom clients |
IPv4: 3.7.35.0/25
|
| UDP |
3478, 3479, 8801 - 8810 |
All Zoom clients |
IPv4: 3.7.35.0/25
|
Firewall rules for Zoom Phone
Note:
- Outbound port 390 must be open for company directory search on desk phones.
- To see firewall rules for zero touch provisioning, refer to the Poly or Yealink support site.
| Protocol | Ports | Source | Destination |
| TCP | 5091 | All Zoom clients |
8.5.128.0/24 |
| TCP | 390 (see note) | All Zoom clients |
3.21.137.128/25 |
| UDP | 20000-64000 | All Zoom Clients |
64.211.144.0/24 |
Firewall rules for Zoom website
| Protocol | Ports | Source | Destination |
| TCP | 80, 443 | All Zoom Clients User's web browser |
*.zoom.us *.cloudfront.net |
Firewall rules for certificate validation
The Zoom client 5.5.0 or later requires allowing the following URLs for certificate validation.
| Protocol | Ports | Source |
Destination |
| HTTP | 80 | Zoom client | crl3.digicert.com crl4.digicert.com ocsp.digicert.com crl.entrust.net certificates.godaddy.com crl.godaddy.com ocsp.godaddy.com certificates.starfieldtech.com crl.starfieldtech.com ocsp.starfieldtech.com |
Zoom CDN
The Zoom CDN is used to optimize the delivery of recordings and other assets from the Zoom website. These IP ranges are dedicated for Zoom. This is not used for the in-meeting experience.
| Protocol | Ports | Source |
Destination |
| HTTPS | 443 | User's web browser | 13.32.10.243 13.32.101.253 13.32.105.249 13.32.111.247 13.32.121.254 13.32.122.250 13.32.128.251 13.32.144.254 13.32.153.246 13.32.161.246 13.32.168.251 13.32.172.251 13.32.176.249 13.32.182.246 13.32.187.254 13.32.192.240 13.32.195.252 13.32.2.254 13.32.202.248 13.32.204.244 13.32.212.241 13.32.214.243 13.32.216.250 13.32.22.241 13.32.220.241 13.32.224.249 13.32.229.241 13.32.24.249 13.32.247.242 13.32.26.253 13.32.36.253 13.32.37.248 13.32.42.249 13.32.53.243 13.32.56.242 13.32.60.240 13.32.66.254 13.32.68.245 13.32.75.243 13.32.76.252 13.32.79.253 13.32.83.243 13.32.85.247 13.32.87.250 13.32.91.244 13.33.10.252 13.33.106.243 13.33.119.252 13.33.123.250 13.33.124.244 13.33.130.251 13.33.131.246 13.33.136.254 13.33.147.242 13.33.151.244 13.33.166.244 13.33.167.241 13.33.171.251 13.33.172.250 13.33.175.245 13.33.178.244 13.33.182.247 13.33.187.248 13.33.202.245 13.33.209.248 13.33.215.242 13.33.221.246 13.33.223.252 13.33.224.249 13.33.228.248 13.33.235.245 13.33.248.252 13.33.25.242 13.33.255.248 13.33.27.246 13.33.28.251 13.33.29.253 13.33.30.250 13.33.36.251 13.33.42.248 13.33.5.247 13.33.51.252 13.33.52.247 13.33.62.243 13.33.70.249 13.33.82.253 13.33.84.243 13.33.85.248 13.33.89.247 13.33.90.250 13.33.99.241 13.35.1.253 13.35.106.251 13.35.11.254 13.35.110.245 13.35.112.241 13.35.122.246 13.35.128.249 13.35.13.254 13.35.137.246 13.35.144.248 13.35.150.244 13.35.159.247 13.35.160.253 13.35.162.252 13.35.169.242 13.35.170.243 13.35.177.242 13.35.18.241 13.35.185.246 13.35.186.244 13.35.19.248 13.35.194.252 13.35.201.245 13.35.206.243 13.35.209.254 13.35.221.253 13.35.230.253 13.35.238.241 13.35.239.244 13.35.242.254 13.35.243.247 13.35.31.249 13.35.34.253 13.35.48.253 13.35.49.247 13.35.52.242 13.35.60.252 13.35.68.244 13.35.69.244 13.35.79.243 13.35.83.252 13.35.85.245 13.35.89.244 13.35.95.252 13.35.97.249 13.224.0.253 13.224.110.245 13.224.111.242 13.224.115.244 13.224.127.243 13.224.128.253 13.224.13.253 13.224.130.254 13.224.135.244 13.224.14.253 13.224.143.244 13.224.147.243 13.224.151.249 13.224.161.248 13.224.162.252 13.224.165.251 13.224.174.242 13.224.178.247 13.224.18.248 13.224.181.249 13.224.185.248 13.224.186.242 13.224.19.248 13.224.199.249 13.224.206.253 13.224.211.246 13.224.213.253 13.224.223.245 13.224.225.246 13.224.226.252 13.224.23.253 13.224.234.242 13.224.241.242 13.224.243.245 13.224.26.254 13.224.30.253 13.224.31.254 13.224.34.241 13.224.46.244 13.224.53.246 13.224.54.249 13.224.62.242 13.224.69.240 13.224.78.251 13.224.85.243 13.224.86.250 13.224.90.253 13.224.93.249 13.224.97.241 13.225.1.250 13.225.106.251 13.225.110.242 13.225.114.245 13.225.122.253 13.225.128.241 13.225.132.246 13.225.143.249 13.225.150.246 13.225.151.241 13.225.153.246 13.225.163.251 13.225.166.250 13.225.17.242 13.225.173.243 13.225.174.249 13.225.176.253 13.225.186.249 13.225.189.243 13.225.198.247 13.225.2.252 13.225.205.245 13.225.207.243 13.225.213.247 13.225.217.247 13.225.225.248 13.225.227.240 13.225.234.250 13.225.238.250 13.225.242.240 13.225.243.241 13.225.254.246 13.225.26.254 13.225.30.248 13.225.36.246 13.225.4.252 13.225.46.247 13.225.52.249 13.225.54.241 13.225.63.241 13.225.69.241 13.225.70.250 13.225.78.245 13.225.82.240 13.225.84.240 13.225.9.251 13.225.90.246 13.225.93.253 13.225.96.240 13.226.1.243 13.226.101.253 13.226.105.243 13.226.106.245 13.226.114.249 13.226.131.249 13.226.137.254 13.226.140.245 13.226.146.242 13.226.148.248 13.226.150.250 13.226.154.245 13.226.155.245 13.226.164.245 13.226.166.249 13.226.169.247 13.226.180.249 13.226.188.244 13.226.19.245 13.226.193.243 13.226.201.253 13.226.209.240 13.226.21.246 13.226.210.245 13.226.212.243 13.226.219.254 13.226.22.251 13.226.228.245 13.226.233.252 13.226.238.241 13.226.243.242 13.226.253.253 13.226.32.247 13.226.34.243 13.226.39.243 13.226.48.247 13.226.5.249 13.226.50.254 13.226.51.241 13.226.62.247 13.226.64.246 13.226.67.249 13.226.74.250 13.226.86.241 13.226.87.247 13.226.88.248 13.226.89.240 13.226.96.245 13.227.102.242 13.227.107.245 13.227.108.248 13.227.109.246 13.227.12.242 13.227.121.243 13.227.124.241 13.227.129.245 13.227.131.254 13.227.134.242 13.227.137.243 13.227.152.240 13.227.157.247 13.227.168.241 13.227.171.241 13.227.174.247 13.227.184.246 13.227.187.245 13.227.19.242 13.227.190.250 13.227.195.250 13.227.205.247 13.227.207.248 13.227.21.244 13.227.211.253 13.227.214.247 13.227.218.250 13.227.22.250 13.227.220.250 13.227.232.240 13.227.237.240 13.227.251.244 13.227.252.254 13.227.253.254 13.227.26.249 13.227.3.246 13.227.41.247 13.227.44.252 13.227.45.253 13.227.5.243 13.227.53.254 13.227.54.247 13.227.57.244 13.227.62.251 13.227.63.240 13.227.73.250 13.227.8.242 13.227.82.252 13.227.88.241 13.227.91.245 13.249.102.250 13.249.104.250 13.249.119.242 13.249.120.245 13.249.121.249 13.249.128.243 13.249.135.245 13.249.136.252 13.249.144.242 13.249.146.243 13.249.153.243 13.249.16.248 13.249.166.251 13.249.167.251 13.249.173.249 13.249.18.248 13.249.181.243 13.249.184.244 13.249.190.254 13.249.203.252 13.249.204.254 13.249.205.241 13.249.214.245 13.249.215.251 13.249.219.247 13.249.224.241 13.249.231.252 13.249.232.251 13.249.242.241 13.249.248.243 13.249.31.240 13.249.33.254 13.249.34.247 13.249.39.254 13.249.42.251 13.249.5.243 13.249.50.254 13.249.53.250 13.249.59.242 13.249.69.248 13.249.7.243 13.249.75.240 13.249.77.248 13.249.87.249 13.249.89.253 13.249.95.246 13.249.98.251 18.64.102.240 18.64.109.241 18.64.114.249 18.64.119.251 18.64.125.242 18.64.128.254 18.64.131.245 18.64.138.242 18.64.140.250 18.64.144.249 18.64.154.250 18.64.159.242 18.64.161.251 18.64.17.248 18.64.171.246 18.64.173.240 18.64.179.243 18.64.184.248 18.64.185.249 18.64.186.246 18.64.198.247 18.64.2.243 18.64.201.253 18.64.206.240 18.64.212.247 18.64.217.251 18.64.22.253 18.64.220.240 18.64.23.250 18.64.232.252 18.64.233.246 18.64.236.243 18.64.243.245 18.64.246.251 18.64.254.254 18.64.36.249 18.64.39.244 18.64.4.240 18.64.43.247 18.64.47.245 18.64.48.252 18.64.50.251 18.64.71.246 18.64.72.252 18.64.74.244 18.64.79.254 18.64.8.250 18.64.85.246 18.64.89.252 18.64.95.241 18.64.99.241 18.65.106.251 18.65.107.247 18.65.115.250 18.65.122.242 18.65.125.243 18.65.127.244 18.65.136.243 18.65.141.254 18.65.142.241 18.65.155.245 18.65.156.242 18.65.159.252 18.65.166.251 18.65.167.253 18.65.170.253 18.65.189.249 18.65.19.254 18.65.190.246 18.65.191.246 18.65.198.243 18.65.203.242 18.65.207.248 18.65.214.241 18.65.217.246 18.65.221.253 18.65.227.240 18.65.23.254 18.65.230.242 18.65.238.251 18.65.244.247 18.65.245.253 18.65.252.247 18.65.26.252 18.65.3.246 18.65.33.243 18.65.35.245 18.65.43.254 18.65.46.254 18.65.47.254 18.65.5.245 18.65.57.249 18.65.62.245 18.65.67.241 18.65.7.250 18.65.73.254 18.65.77.249 18.65.80.243 18.65.82.252 18.65.94.244 18.65.96.240 18.65.99.243 18.66.10.251 18.66.111.252 18.66.113.245 18.66.115.250 18.66.125.243 18.66.130.242 18.66.131.245 18.66.137.252 18.66.138.245 18.66.141.240 18.66.152.241 18.66.155.245 18.66.156.254 18.66.167.247 18.66.169.248 18.66.176.245 18.66.18.242 18.66.180.242 18.66.182.249 18.66.192.244 18.66.198.248 18.66.2.250 18.66.202.247 18.66.205.240 18.66.211.252 18.66.212.252 18.66.221.253 18.66.228.246 18.66.229.252 18.66.236.242 18.66.242.252 18.66.245.249 18.66.249.251 18.66.25.244 18.66.27.249 18.66.3.248 18.66.36.244 18.66.37.250 18.66.38.241 18.66.46.242 18.66.51.247 18.66.57.246 18.66.60.246 18.66.62.251 18.66.63.242 18.66.81.249 18.66.84.249 18.66.86.244 18.66.91.251 18.66.94.249 18.66.99.251 18.67.0.245 18.67.1.253 18.67.104.248 18.67.106.254 18.67.110.252 18.67.121.241 18.67.124.244 18.67.125.249 18.67.139.240 18.67.140.246 18.67.142.252 18.67.149.249 18.67.150.245 18.67.158.242 18.67.16.251 18.67.23.254 18.67.26.241 18.67.30.254 18.67.37.254 18.67.40.252 18.67.48.251 18.67.49.246 18.67.54.244 18.67.59.245 18.67.63.242 18.67.68.249 18.67.75.252 18.67.77.254 18.67.86.247 18.67.9.254 18.67.90.248 18.67.91.241 18.67.96.249 52.84.10.251 52.84.100.250 52.84.102.245 52.84.103.241 52.84.106.250 52.84.108.244 52.84.11.252 52.84.116.248 52.84.117.245 52.84.123.243 52.84.126.246 52.84.137.246 52.84.145.254 52.84.154.253 52.84.158.240 52.84.161.254 52.84.166.254 52.84.169.253 52.84.175.251 52.84.179.251 52.84.18.248 52.84.186.242 52.84.197.248 52.84.213.244 52.84.22.240 52.84.220.250 52.84.227.249 52.84.228.241 52.84.235.246 52.84.244.240 52.84.248.241 52.84.39.250 52.84.42.250 52.84.5.253 52.84.52.242 52.84.64.254 52.84.79.246 52.84.80.251 52.84.93.247 52.85.102.247 52.85.109.243 52.85.112.250 52.85.123.243 52.85.124.252 52.85.125.249 52.85.130.253 52.85.137.241 52.85.149.249 52.85.15.245 52.85.156.249 52.85.159.244 52.85.160.254 52.85.166.251 52.85.183.254 52.85.188.240 52.85.195.252 52.85.208.252 52.85.213.247 52.85.223.249 52.85.228.249 52.85.231.250 52.85.232.246 52.85.25.241 52.85.254.242 52.85.27.244 52.85.28.247 52.85.3.246 52.85.41.242 52.85.42.241 52.85.46.253 52.85.49.248 52.85.53.244 52.85.56.244 52.85.64.244 52.85.67.240 52.85.73.254 52.85.76.250 52.85.77.246 52.85.82.241 52.85.87.244 52.85.92.243 52.222.133.253 52.222.134.240 52.222.139.253 52.222.141.252 52.222.144.252 52.222.149.253 52.222.152.243 52.222.153.244 52.222.160.243 52.222.162.249 52.222.170.243 52.222.176.240 52.222.183.245 52.222.184.249 52.222.186.247 52.222.189.247 52.222.192.241 52.222.200.240 52.222.202.244 52.222.216.241 52.222.218.245 52.222.220.244 52.222.233.247 52.222.237.248 52.222.241.247 52.222.243.254 52.222.247.252 52.222.248.241 54.182.7.248 54.192.100.251 54.192.104.251 54.192.107.248 54.192.113.247 54.192.121.240 54.192.127.245 54.192.129.251 54.192.13.243 54.192.138.241 54.192.145.253 54.192.155.248 54.192.156.249 54.192.16.240 54.192.169.253 54.192.173.252 54.192.178.246 54.192.188.252 54.192.191.242 54.192.193.254 54.192.195.249 54.192.196.247 54.192.199.252 54.192.218.244 54.192.219.252 54.192.225.245 54.192.227.253 54.192.235.250 54.192.255.250 54.192.29.240 54.192.30.242 54.192.33.247 54.192.49.254 54.192.52.250 54.192.56.245 54.192.57.244 54.192.59.241 54.192.65.242 54.192.66.249 54.192.75.240 54.192.76.254 54.192.85.247 54.192.92.251 54.192.94.248 54.192.97.248 54.192.98.248 54.230.105.251 54.230.11.248 54.230.111.252 54.230.119.253 54.230.121.241 54.230.123.240 54.230.138.243 54.230.145.242 54.230.15.251 54.230.151.247 54.230.158.244 54.230.160.247 54.230.167.249 54.230.174.254 54.230.176.251 54.230.178.240 54.230.181.248 54.230.182.246 54.230.183.246 54.230.189.245 54.230.20.250 54.230.209.244 54.230.217.247 54.230.228.253 54.230.229.247 54.230.238.254 54.230.247.253 54.230.248.245 54.230.254.254 54.230.31.244 54.230.33.244 54.230.42.254 54.230.49.240 54.230.61.254 54.230.69.250 54.230.76.242 54.230.77.253 54.230.82.253 54.230.85.248 54.230.87.254 54.230.96.253 54.239.163.245 54.239.164.249 54.239.165.250 54.239.195.252 54.239.216.253 54.240.172.248 54.240.175.249 54.240.187.245 65.8.1.251 65.8.106.247 65.8.11.241 65.8.111.252 65.8.119.247 65.8.122.252 65.8.126.249 65.8.129.245 65.8.137.252 65.8.142.240 65.8.149.242 65.8.154.254 65.8.157.251 65.8.158.254 65.8.165.244 65.8.166.252 65.8.181.241 65.8.184.254 65.8.185.253 65.8.19.245 65.8.192.253 65.8.199.246 65.8.201.244 65.8.204.240 65.8.213.250 65.8.220.253 65.8.222.240 65.8.227.241 65.8.235.251 65.8.236.248 65.8.241.254 65.8.245.252 65.8.254.247 65.8.26.249 65.8.32.245 65.8.34.241 65.8.42.252 65.8.44.247 65.8.52.246 65.8.57.253 65.8.58.252 65.8.65.247 65.8.66.249 65.8.72.248 65.8.80.251 65.8.81.241 65.8.88.241 65.8.98.253 65.8.99.244 65.9.108.242 65.9.109.241 65.9.11.243 65.9.115.240 65.9.118.253 65.9.126.254 65.9.129.248 65.9.133.241 65.9.142.242 65.9.143.254 65.9.144.244 65.9.151.243 65.9.164.243 65.9.166.240 65.9.167.250 65.9.177.252 65.9.179.243 65.9.180.245 65.9.19.250 65.9.20.246 65.9.26.254 65.9.32.243 65.9.34.254 65.9.40.248 65.9.43.244 65.9.48.248 65.9.49.243 65.9.66.247 65.9.69.252 65.9.71.254 65.9.72.252 65.9.79.250 65.9.86.250 65.9.89.253 65.9.97.251 99.84.102.242 99.84.104.243 99.84.114.241 99.84.117.246 99.84.126.248 99.84.133.245 99.84.136.248 99.84.14.246 99.84.142.254 99.84.149.240 99.84.154.250 99.84.159.244 99.84.16.250 99.84.167.242 99.84.169.252 99.84.174.245 99.84.182.246 99.84.185.249 99.84.186.250 99.84.201.240 99.84.205.246 99.84.207.247 99.84.216.254 99.84.221.250 99.84.222.240 99.84.229.241 99.84.230.248 99.84.234.249 99.84.240.240 99.84.250.241 99.84.253.243 99.84.27.246 99.84.30.248 99.84.34.246 99.84.40.241 99.84.47.242 99.84.53.243 99.84.59.242 99.84.62.252 99.84.69.243 99.84.7.253 99.84.73.240 99.84.75.253 99.84.80.249 99.84.88.246 99.84.89.248 99.84.9.241 99.84.98.245 99.86.10.251 99.86.102.241 99.86.103.249 99.86.111.252 99.86.113.252 99.86.117.246 99.86.122.241 99.86.126.253 99.86.129.250 99.86.133.247 99.86.145.243 99.86.147.243 99.86.157.245 99.86.163.242 99.86.166.248 99.86.173.247 99.86.175.250 99.86.183.241 99.86.185.249 99.86.19.244 99.86.190.248 99.86.193.246 99.86.194.253 99.86.207.240 99.86.208.245 99.86.209.250 99.86.210.246 99.86.218.246 99.86.22.241 99.86.226.253 99.86.239.247 99.86.244.240 99.86.246.244 99.86.3.252 99.86.42.254 99.86.49.247 99.86.5.250 99.86.53.248 99.86.58.243 99.86.6.252 99.86.63.254 99.86.66.246 99.86.72.240 99.86.79.254 99.86.84.245 99.86.88.246 99.86.90.253 143.204.106.248 143.204.114.252 143.204.119.246 143.204.126.248 143.204.130.249 143.204.134.249 143.204.137.243 143.204.138.248 143.204.141.243 143.204.15.242 143.204.153.250 143.204.159.241 143.204.165.249 143.204.174.246 143.204.177.248 143.204.178.253 143.204.19.240 143.204.190.252 143.204.191.243 143.204.199.251 143.204.209.247 143.204.210.246 143.204.212.243 143.204.217.251 143.204.22.251 143.204.222.243 143.204.226.248 143.204.239.253 143.204.242.251 143.204.244.248 143.204.25.248 143.204.250.242 143.204.253.252 143.204.32.254 143.204.33.245 143.204.47.246 143.204.5.246 143.204.51.250 143.204.53.241 143.204.57.253 143.204.6.240 143.204.67.249 143.204.73.247 143.204.78.248 143.204.85.247 143.204.90.253 143.204.97.253 143.204.98.249 204.246.177.250 205.251.212.243 205.251.222.254 205.251.253.248 216.137.34.240 216.137.39.253 216.137.40.242 216.137.41.243 216.137.46.244 |
Additional IP ranges
Additional IP ranges to be allowed can also be found in the following lists:
Proxy server
We support https/SSL proxy server via port 443 for Zoom traffic.
Note: This does not apply to the Zoom Phone service.
Zoom automatically detects your proxy settings. In some instances, you may be prompted to enter the proxy username/password.
Note: We recommend allowing zoom.us and *.zoom.us from proxy or SSL inspection.
