Tags: osint
Rating:
# Identifications
**Category: OSINT**
Challenge prompt:
> Hey man. I'm standing in front of this Verizon central office building. What's its CLLI code?
> What? No, I don't know where I am, my GPS is broken. I tried to connect to some Wi-Fi so I could download a map or something, but I don't know the password to any of these networks.
I looked up what CLLI meant:
> CLLI (pronounced "silly") is a Bell System acronym standing for Common Language Location Identifier. It was a standardized way of describing locations and significant pieces of hardware at those locations.
The challenge included two photos:
The last network looked pretty uniquely named. I went to https://wigle.net/ and typed in the details. It was able to highlight the geographic location of the network on a map:
Looking on Google Street View at that location, I was able to find the building:
The address is `1305 S Main St, Mt Airy, MD 21771, USA`. Next, I started to dig for the CLLI.
This site let me search for CLLI codes by zip code: https://www.telcodata.us/search-switches-by-zip-code?zip=21771. Putting in the zip from Google Maps shows:
CLLI| LATA| English Name| Switch Type| Street Address| City| State| Zip
---|---|---|---|---|---|---|---
MTARMDMARS0| 240| N/A| WECO 5ESS Remote (5B RSM)| MAIN ST| MOUNT AIRY| MD| 21771
MTARMDMARS1| 240| MOUNT AIRY| 5ESS-EXM| MAIN ST| MOUNT AIRY| MD| 21771
MTARMDSD00T| 240| N/A| N/A| 9625-A BROWN CHURCH RD| MOUNT AIRY| MD| 21771
MTARMDSDD20| N/A| N/A| N/A| 9625-A BROWN CHURCH RD| MOUNT AIRY| MD| 21771
MTARMDSDDS0| 240| N/A| N/A| 9625-A BROWN CHURCH RD| MOUNT AIRY| MD| 21771
The one named `Mount Airy` looked like a good candidate. Submitting its CLLI (`MTARMDMARS1`) as the flag solved this challenge.
`DawgCTF{MTARMDMARS1}`
