I currently have AT&T Fiber internet service. It ranges anywhere from 300Mbps to 1,000 Mbps (Gigabit). If you are interested in renting static IPs along with internet service, AT&T customer service stated the following rental cost for a block of usable static IPs.
The block of addresses you receive will always have 3 deducted for the network base address, gateway, and broadcast address. For example, if you purchase a block of 8, you will only have 5 usable addresses. Below is a chart showing you the cost per IP based on the usable addresses you receive.
| Usable Address | Price Per Month | Cost Per IP |
| 5 | $15 | $3.00 |
| 13 | $25 | $1.923 |
| 29 | $30 | $1.034 |
| 61 | $35 | $0.574 |
| 125 | $40 | $0.320 |
More details here if you want to learn about static IPs: https://www.att.com/support/smallbusiness/article/smb-internet/KM1181996/
They bill you immediately and charge a percentage based on the number of days left in your current billing cycle. Customer service did not immediately tell me what my network settings would be, so I had to call them the next day to get the full network details.
Below is the guide I followed after customer service gave me the details. They offered to plug the details into the modem for me, but I chose to perform the steps myself. Up to you depending on your comfort level.
The instructions below are perfect and worked exactly how I needed them to.
Remember, once you enter your network details, you have to navigate to IP Allocation to allocate an existing device to the WAN IP.
The URL is http://192.168.1.254/cgi-bin/ipalloc.ha
If you want to navigate to the screen manually:
- Navigate to 192.168.1.254
- Enter the access code that is on the modem
- Click on Home Network
- Click on IP Allocation
Note: There is a limit to the number of devices you can allocate (17?). If you want to fully use all IPs you have rented, you will need to use different hardware or manually assign a WAN IP on the device itself.
If you know how to release an IP allocated to a device, please let me know.
IP Allocation policy
They don’t mention a policy of renting more than 128 IPs (125 usable IPs).
https://globalnetwork.support.att.com/att/downloads/vpn_ip_allocation.pdf