DIVER OSINT CTF 2026 "where" Writeup

This article was automatically translated from Japanese by AI.

Challenge

DIVER OSINT CTF 2026 “where”

Solution

The utility pole number seemed to be the only readable clue in the photo, so I looked into how to interpret these numbers and whether there were any search services. The reference links on Plonk It and a Daum Cafe post helped me understand the basics, but finding the location this way seemed quite difficult.

While looking for services to convert or search utility pole numbers, I found a YouTube video introducing a search service from around 1:32. I searched for a service using the text shown on screen, 전주 번호 검색, and found the location by searching for 0224F9811 on ElecMap. The result also displayed the coordinates as 위도 37.542512 / 경도 127.057041 (latitude 37.542512 / longitude 127.057041), which I used to confirm the location on Google Maps.

Source: ElecMap. Screenshot taken on September 9, 2026.

Flag

Around 37.5425, 127.0570