Nob

~/about

Hi, I'm Nob

I like understanding how things work on the inside, and I usually end up building something to get there

Most of these projects started with something small: knowing when the next bus was coming, playing with friends without keeping a server online, a phone IP that refused to change. Some turned out better than others; these are the ones that work

01 · mobile networks

IP Rotator

Changing an Android phone's public IP from a PC, over ADB

1. Dec 2025The research Does toggling airplane mode over ADB change the public IP? With settings put global airplane_mode_on, no: it only flips a setting, and the radio never actually goes down. The verdict in v0.1.0: "ADB can't do it"
2. Jun 30, 2026The breakthrough While building Goket, my network panel, Claude (Anthropic's AI) found cmd connectivity airplane-mode: it goes through Android's connectivity service and really powers the radio off, no root needed, on Android 16. That one's on Claude
3. Sep 30, 2026Back to the repo Mode C: the phone's Wi-Fi stays off during the test, short cycles repeat until the carrier's CGNAT lets go of a new IP, and the IP is measured through the tethering interface. Real test: new IP on the first try, in 20 s. Shipped as v0.2.0

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02 · android + python

celltrace

Finding cell towers without GPS

CellTraceLogger is an Android app that listens to the cellular network (Cell ID, LTE, 5G NR, signal strength) from a foreground service and logs every observation. celltrace is the Python library that matches those observations against OpenCellID and infers the infrastructure around you

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03 · minecraft mod

jukz

A Minecraft world that lives wherever its host is online

A Fabric 1.21.1 mod. Every world gets a permanent UUID; when you open it, the network asks whether someone is already hosting it. If so, you join as a guest. If not, you become the host and announce it. Nobody has to keep a Minecraft server running

1. Jun 9, 2026Finding each other Multicast discovery on the local network, plus a rendezvous server for the internet; UPnP and STUN to get through each home's NAT
2. Jun 10, 2026First game Host and guest playing end to end. The DHT I had planned got dropped: the rendezvous server was simpler and more reliable
3. Jun 11, 2026The world fell out of sync Handing the world to the next host was losing changes. The fix: a WebSocket relay on the rendezvous server that carries the world snapshot
4. Jun 13–14, 2026Never lose the world If the last player closes the game with nobody else online, the world is uploaded to the cloud (R2) and the next player picks it up from there. Also fixed the case of two hosts at once
5. Oct 3, 2026Moving to Cloudflare The rendezvous server moved to a Cloudflare Worker with Durable Objects, the screens were rebuilt on one shared theme, and closing access no longer splits the world in two

164 commits over 13 days

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04 · desktop app

ExphoraDB

Open huge datasets in under two seconds, no cloud involved

Explore JSON, CSV, SQLite, XML and more: filter, search, export, and share over end-to-end encrypted P2P. Local performance first

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06 · my personal system

gok-

A family of apps I use every day, sharing one look and one infrastructure

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private code · built for me

07 · minecraft + networking

AccessScope

What does a Minecraft server tell a player who tries to join?

It connects with a real session (Mineflayer), reads what the server sends back (kick message, MOTD, icon, server brand) and classifies the response. It can go out directly or through Tor, to compare what each route gets

1. Jul 29, 2026The foundation Every scan runs in its own isolated Node.js process that can be cancelled at any moment. The rules vote: if two disagree, the result is "ambiguous" instead of a guess. Tested live against real servers
2. Jul 30, 2026Polish Configurable timeouts, result export, automated tests, and a shareable image card showing what each server replied

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private code

08 · library

pane

A real browser inside your Java app, drawn however you like

Chromium without a window: every page comes out as pixels your app draws, and takes mouse and keyboard input in GLFW codes. It's how Ko-fi opens inside Minecraft, in jukz. It's mine and MIT, built on java-cef

1. Oct 9, 2026My own library MCEF stops at 1.21.4 and is LGPL, so I wrote pane from java-cef's API. It works on all three Minecraft versions jukz supports
2. Oct 9, 2026My own copy of Chromium All six builds live at chromium.nuulm.com. Copying them uncovered a Windows bug, fixed in v0.1.1

2 commits over 1 day

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~/numbers

By the numbers

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live from GitHub and the MIO · the little city of bars is my contribution calendar for the past year