---
title: "Local Calling Area Rating Glossary"
slug: "local-calling-area-rating-glossary-1"
updated: 2026-08-10T20:22:26Z
published: 2026-08-10T20:22:26Z
canonical: "help.idibilling.com/local-calling-area-rating-glossary-1"
---

> ## 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.

# Local Calling Area Rating Glossary

| EAA | Exchange Area Address. The NPANXX location of a service number maintained by CCMI. |
| --- | --- |
| RLR | Rate Line Reference. A number associated with a Call Plan to determine the rate local calls are charged. |
| RCF | Rate Center File. A file maintained by CCMI for Local Calling Area rating. |
| RLRN | Rate Line Reference Number. Same as RLR. |
| CP | Call Plan. Rate plans that are maintained by CCMI for Local Calling Area rating. |
| OCN | Operating Company Number. The four-digit number for an ILEC. |
| ILEC | Incumbent Local Exchange Carrier. The local telephone company that supplies local access, often the local Regional Bell Operating Company. |