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ABOUT STATIC IP ADDRESSES

Learn whether you need a static IP addresses. How does it differ from dynamic IP
addresses?

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DETAILED INFO


HOW DYNAMIC AND STATIC IP ADDRESSES DIFFER

A dynamic IP address changes from time to time. It is how most ISP and corporate
networks assign IP addresses to their customers. It’s easy to manage for
internet users because it doesn't require any additional setup or network
configuration. 

A static IP address, however, never changes and can be assigned to a specific
device. It allows you to host applications that can be accessed remotely. You
must manually add static IP address settings into your network properties.

AT&T Wi-Fi can support PCs with fixed or static IP addresses, although in some
cases these do require configuration changes. Some applications such as VPNs
(Virtual Private Network) and routers may require a static IP address provided
by AT&T Wi-Fi in order to gain access to the internet. An AT&T Wi-Fi provided
static IP is only available in meeting rooms.


WHEN A STATIC IP MIGHT BE USEFUL

A static IP is useful for consumers and many small businesses that have minor
needs such as:
 * Hosting a web, mail or FTP server
 * Accessing a corporate network remotely
 * Hosting a webcam for video streaming
 * Using video conference applications


NUMBER OF STATIC IP ADDRESSES AVAILABLE

When you buy a block of static IP addresses, three will be used right away.
These will be for the network base address, your Wi-Fi gateway, and your
broadcast address. See the table below for specifics.


BLOCK SIZES

Total Block SizeUsable Addresses85161332296461


HOW MULTI STATIC IP ADDRESSES WORK

When you connect to the AT&T network, you’ll get a Dynamic WAN address. It acts
as a gateway for the static IP addresses to reach the network. AT&T doesn't
automatically assign static IP addresses to devices connected to the Dynamic
WAN. In order to use your static IP addresses, you will need to contact us to
have your equipment set up.


STATIC DSL IP TO STATIC INTERNET IP

If you change internet services, you’ll have to change your static IP address.
Internet static IP addresses are taken from a different pool. You may be able to
add a generic reverse DNS service to all internet static blocks like DSL as well
as establishing a delegation of authority for DNS. Please contact us to discuss
your options.


ADDITIONAL HELP

Many static IP address issues can be resolved by AT&T Customer Support,
including the following:
 * IP address changes
 * IP address cost
 * Lost IP addresses
 * Gateway is missing static IP addresses




Last updated: November 10, 2023

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