Since we use a firewall to protect our network and your phone system from intrusion, we need your Public IP address so that we can add it to the accepted IP Address list.
This becomes a chore to manage and will result in downtime affecting your service, so we highly recommend obtaining this add-on from Comcast
Contact Comcast Business to Add the Static IP Service
You can request it through:
- Comcast Business Support (phone); you will need your Account number
- Your Comcast Business account rep
- Comcast Business online portal → Billing → Purchase Services
Static IPs are not self‑provisioned—you must order them.
1️⃣ What you request:
- “A single static public IP address”
(Comcast calls this a /30 block, which gives you 1 usable IP.)
Once ordered, Comcast will push the configuration to your modem.
2️⃣ Wait for Comcast to Provision the IP
After ordering, Comcast will:
- Assign your static IP
- Assign the gateway IP
- Assign the subnet mask
- Push the configuration to your Comcast Business Gateway
You do not manually enter the static IP into the Comcast modem—Comcast provisions it remotely.
They will inform you when the process is completed; at this point, you should provide it to us by emailing:
Subject: Static IP Registered
In the body of the message, provide the Static IP Address.
It will look something like 123.456.789.100