If you need to find your fire department's National Emergency Response Information System (NERIS) ID, there are a few ways to do so. Your department may have an internal identifier, like the "subscriber number" for IaR, but it is separate from a NERIS ID.
Contacting Your State Fire Authority
The best place to start is by contacting your state's State Fire Authority. They are the official source for this information and can provide you with your department's specific NERIS ID.
Using the U.S. Fire Administration (USFA) Website
You can also visit the U.S. Fire Administration (USFA) website. While there is no public lookup tool for NERIS IDs on their site, the USFA is a valuable resource for information about the system and can guide you on how to obtain your ID.
Here is the link to their NERIS page: https://www.usfa.fema.gov/nfirs/neris/
Third-Party Resources
Some third-party websites, such as Responserack, may have publicly available lists of fire department IDs. An internet search can sometimes help you find this information, but it's always best to verify it with an official source.