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Monday, April 24th, 2017 7:11 PM

How do I setup an AT&T Internet Static IP?

AT&T Static IPs are available as a bolt-on; priced at a premium on top of the price of AT&T Internet service.

A static IP address is an IP Address associated with your account that never changes and can be assigned to a specific device. Every time that you connect to the AT&T network the static IP address routes traffic to the computer or device that can be assigned an IP (such as a router or firewall). This allows you to host a variety of applications that can be accessed remotely.

Static IP Block sizes come in 8, 16, 32, 64, & 128 at this time


How dynamic and static IP addresses differ

A dynamically assigned IP (Internet Protocol) address is one that is assigned by a DHCP (Dynamic Host Configuration Protocol) server, contributing to a transparent experience. This is how most ISP and corporate networks are configured.

A static or fixed IP address requires you to manually configure your IP address, along with other settings such as the gateway, the subnet mask, and DNS (Domain Name Service) settings into your network properties. Computers do not require static IP addresses for basic connectivity to the Internet and access to email. However, some networks and ISPs do not provide a DHCP server; in that case, the computer must have a static/fixed configuration.

When a static IP might be useful

A Static IP is useful for consumers and many small businesses that have minor needs such as:


  • Host a web, mail or FTP server
  • Access a corporate network remotely
  • Host a webcam for video streaming
  • Use video conference applications

Static IP Calculator

A Static IP Calculator uses the customer's CIDR block to determine the correct static IP provisioning information for that customer's gateway.

A CIDR block is the IP address/prefix size combination (e.g
The customer should receive the CIDR block when ordering service and can be provided by customer care.
Enter the CIDR block in your favorite CIDR calculator or you can use this CIDR calculator at your convenience.

AT&T Static IP Eligibility

Eligible customers include consumer and business, new install and existing, AT&T Internet customers. The customer needs one of the following RGs:



Note: An AT&T Static IP cannot be provisioned with the Motorola 2210-02-1ATT modem or the Motorola 2310-51 modem.

Static IP Block Example

In this example, the customer has a block of eight (Static IP Addresses):


This is the network base address is not usable as a host address.


Usable host address: 


This is the last usable address. Assign this address to the gateway/RG. 


This is the broadcast address and not usable as a host address. 


Note: In all Static IP block options, always assign the first and last IP address as the network base address and the broadcast address. Always assign the second to the last as the gateway/RG. The customer cannot assign these three IP addresses to any of their local devices. However, any IP address between the first, second to the last, and the last IP addresses are eligible to assign to local devices.



  • Block of 08: (05 are usable by the customer)
  • Block of 16: (13 are usable by the customer)
  • Block of 32: (29 are usable by the customer)
  • Block of 64: (61 are usable by the customer)
  • Block of 128: (125 are usable by the customer)

Gateway/RG IP address is always an even number. See example address above (

Subnet Mask

Use the following chart to determine the correct subnet to use.



Gateway Settings

Note: In this example, you are seeing screen shots from an ARRIS router model. The view may vary depending on your router model.



Public Static IP Subnet Setup

1. Launch a browser window and navigate to IP address
2. Click Home Network > Subnets & DHCP.
3. If prompted, enter the device access code. The device access code (system password) is a 10-digit code found on the side of the RG.

  • If you changed the system password, enter that new password.

4. Under Public Subnet heading, toggle the Public Subnet Enable from Off to On.

  • Choose either Public or Private IPs. Do not mix these two selections.

5. In the Public Gateway Address field, enter the router address of the public static block. This is the second from the last IP address in the IP block.
6. In the Subnet Mask field, enter the subnet mask.
7. In the DHCPv4 Start Address and DHCPv4 End Address fields, enter the first and last usable IP address.
8. In the Primary DHCP Pool section, click either Public or Private IPs. Do not mix these two selections.

  • Private means the next IP the RG assigns to a device is a local address.
  • Public means the next IP the RG assigns to a device is one of the five public IP addresses. In this case, one of the addresses.

9. Click Save.

Assign an IP

1. Sign in to your router/gateway using in your web browser.
2. Once signed into router then click 'Home Network' tab
3. Next 'IP Allocation
4. Then click 'Allocate'
5. Then you can choose a public IP to assign to your specific device you are allocating the IP.


This will tell the router to always assign that IP to a particular device and it is not necessary to make changes to device IP settings.


Heads up: MAC Filtering has been disabled on the 5268AC. If you are in need of a modem that requires MAC Filtering, please reach out to us in the AT&T Community

Jared, AT&T Community Specialist


*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

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Accepted Solution

Official Solution

Community Support


6.7K Messages

7 years ago

Thanks for visiting our AT&T Internet Static IP article. We hope this answers many of the questions for your static IP setups and general knowledge for it. Be sure to post any feedback and thanks for being the best part of the community forums.



ATTJohnCS, AT&T Community Specialist




5 Messages

6 years ago

Want to use your own router?


The feature set of the AT&T gateway may not match the needs of your local network. You may prefer to configure routing using your own router. With a static IP block, you will want to use a "Cascaded Router". Here's how I set up the configuration on my own network:

Screenshot_2018-07-18 Broadband link configuration.pngSetup of a PACE Gateway for cascaded Static IP routing

My local network is on an entirely different subnet, and all of my routing and port forwarding is handled by the MikroTik router which has much more powerful configuration options. Hopefully I can save you some of the trial and error I went through getting it all to work!


1 Attachment



1 Message

5 years ago

Hi, I would appreciate of someone can help with telling me if I can assign my static IP address to a server that is not on my LAN (it is in my office at work)?



6 Messages

4 years ago

This is old and outdated. As of 1/30/2020 the GUI in the Pace 5268AC doesn't look this way, has different terms for features and there is NO help file on the side explaining this info. Should really stop sending this as an example for setting up.

New Member


1 Message

4 years ago

When filling in the Public Gateway Address, I keep getting the message "Public subnet must be a WAN-side subnet" and it doesn't allow me to save. I'm using the second to last in my block like step 5 says to.

New Member


1 Message

4 years ago

I purchased 13 Static Address from AT&T. These are the addresses, only last digits, from 193 thru 207. I was bale to assigned 201 thru 205 with gateway 206 on the router. But my prom is the IP addresses 193 thru 200. How do I assigned the rest of them to my Motorola NGV589 Modem/router?

New Member


7 Messages

3 years ago

How about what one needs to do to GET their 8-pack or more of the things?



37 Messages

2 years ago

Field tech came. Filled out these fields exactly how it is here.

Didn't work.

12 hours of escalation later by Tier I lead to them closing the case and referring me to this article.

The article that the tech used.

New Member


8 Messages

2 years ago

I have a router with a AT&t prepaid sim card installed. The router works perfectly, but I need to purchase a public IPv4 IP address from at&t prepaid for this router. I have a device, a helium hotspot, that will not properly connect by ethernet if it does not have this type of IP address to reference, or so I've been told.

However, when I call AT&t prepaid and tell them I need to purchase a IPv4 address, although perfectly polite, they tell me that they don't know what IPv4 is. Can anyone tell me where and how I can purchase such an address?  I'm still learning myself and don't know how to explain this to the AT&t prepaid salesperson.



31 Messages

1 year ago

If you need to change the pointer records associated with your Static IP you can email and ask them to change: to point to

include your Uverse/Fiber account number, name, email address, with the subject of the email to be "Modify PTR ".

Once updated you can ping and it will resolve to:

This type of update is required if you are running a web server or email server to verify authenticity of the domain server.

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