As a general matter, you will not need to do anything with these IP addresses as our provisioning servers will take care of SIP device configuration.  Each client's dedicated domain name will resolve to the appropriate server automatically.

In certain situations, however, it may be necessary to open ports in the client site firewall.  We recommend utilizing the subnet ranges, as there may be more than one server on a given Geo-Node that can serve the same function.  The following are Subnet Ranges and IP Addresses that are in use by our system:

70.42.44.0/24 (Secaucus Geo-Node)

75.98.50.0/24 (Dallas Geo-Node)

216.24.144.0/24 (Las Vegas Geo-Node)

199.21.246.224/27 (Minneapolis Geo-Node)

207.254.80.0/22 (Overlay Cluster)
- 207.254.80.0/24 (Atlanta)
- 207.254.81.0/24 (Secaucus)
- 207.254.82.0/24 (Dallas)
- 207.254.83.0/24 (Las Vegas)

18.209.52.107/32 (Instant FAX ATA System)

54.219.249.208/32 (Instant FAX ATA System)

Our Modern UC Apps (ConnectUC and MeetingsUC) utilize Amazon's Elastic Load Balancer Service.  We recommend you allow traffic to the following domains:

- *.gazelletel.com
- ws.connectuc.io
- api.connectuc.io
- *.reachuc.com
- *.ws-messaging.chime.aws

The following protocols and ports are used by our systems: