---
title: This CDR has been brought to you from the letters B, F, and the - ECG
description: TWICE in the past month, I've bumped into CDRs from SS7 equipment in Atlanta that include alphabetic characters and pound signs in the calling party number
---

[VoIP & Network Technology Latest News & Insights | ECG](https://www.ecg.co/blog)

# [This CDR has been brought to you from the letters B, F, and the - ECG](https://www.ecg.co/blog/50-this-cdr-has-been-brought-to-you-from-the-letters-b-f-and-the-symbol)

 Written by [Mark Lindsey](https://www.ecg.co/blog/author/mark-lindsey) | Aug 13, 2008, 4:00:00 AM

TWICE in the past month, I've bumped into CDRs from SS7 equipment in   
Atlanta that include alphabetic characters and pound signs in the   
calling party number (ANI) field of the CDR.

One of the calls was from 5176#0B600. (That's a phone number.)

What's going on here?

[View full post](https://www.ecg.co/blog/50-this-cdr-has-been-brought-to-you-from-the-letters-b-f-and-the-symbol)

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