---
title: "E911 Glossary"
slug: "e911-glossary"
updated: 2026-08-10T20:22:32Z
published: 2026-08-10T20:22:32Z
canonical: "help.idibilling.com/e911-glossary"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.idibilling.com/llms.txt
> Use this file to discover all available pages before exploring further.

# E911 Glossary

| ALI | Automatic Location Information. A database that contains the caller's name, telephone number, address, and other supporting information for use by PSAPs. |
| --- | --- |
| E911 Batch | Based on the E911 provider, the E911 Batch is a placeholder referenced by E911 Batch Details. |
| E911 Batch Detail | An E911 Batch Detail is a record containing the information specifying the location of a service number for emergency purposes. |
| E911 Provider | An organization that provides necessary information to the ALI database and disperses the information to the appropriate PSAP when an emergency call is made. This organization is often a County, but can also be a company contracted to maintain the information, such as Frontier. |
| ESN | Emergency Service Number. The number designating the emergency services applicable to that locale of the originating 911 call. |
| FIPS code | Federal Information Processing Standard. Standards used for data communication. |
| MSAG | Master Street Address Guide. A database of address information, dispatch community name, and ESNs used to validate customer address and to assign an ESN to each customer telephone number record. |
| MSAG Provider | An organization that supplies the MSAG used to validate service addresses for E911. An MSAG Provider is usually a County. |
| NENA | National Emergency Number Association. The governing agency for E911 recommendations and specifications. |
| PSAP | Public Safety Answering Point. The location where E911 calls are received from the public. |
| TAR Code | Taxing Area Rate Code. |