Portcyou

What it does

Tired of port conflicts? Portcyou is the comprehensive port database every developer needs. Search 10,000+ ports, discover which services use them, and avoid conflicts before they happen. Multi-language support, smart search, and developer API included.

Professional port lookup database helping developers quickly find port usage information to avoid port conflicts during development

OpenSSH listens on TCP 22 by default. Its SFTP subsystem transfers files over SSH, not the historical protocol assigned port 115. TCP 25 carries SMTP mail transfer, commonly between mail servers. Mail clients should use the submission endpoint specified by their provider. Conventional DNS uses port 53 over UDP and TCP. Treating DNS as a UDP-only service can cause incomplete or intermittent resolution. DHCPv4 servers use UDP 67 and clients use UDP 68. This is an address-lease protocol, not a website to open in a browser. An HTTP URL without an explicit port normally uses 80. The actual web-server configuration determines whether and where a listener exists. IANA assigns TCP 115 to the…from portcyou.com

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  Portrackr2024 · ▲92

  Control development ports with ease

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  Port Zero – How I learned to stop worrying and love PORT=0Jul 2026 · portzero.net · ▲19

  Hi HN, Recently I wasted several hours wrangling my dev environment only to find out that the browser frontend was talking to the wrong version of the backend. This got me thinking--why on earth are we still using simple numbers to describe which process to connect to? Why not use names instead? I thought of all the times a program wouldn't start because of port conflicts. The more I thought about it, the crazier it seemed. Modern operating systems already offer no-conflict ports: if you make your TCP server listen on port 0, the OS assigns you a random available port. But that only solves…

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  PortTraceXNov 2025 · porttracex.com · ▲76

  Reveal why a port is in use

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  Portainer – A lightweight management UI for Docker2016 · portainer.io · ▲146

  Portainer is one platform to deploy, run, secure, and govern Kubernetes across your whole fleet, from a single control plane. A platform is a product, not a project.

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  Portr – open-source ngrok alternative designed for teams2024 · github.com · ▲172

  Expose local http, tcp or websocket connections to the public internet - amalshaji/portr

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  Port Kill – A lightweight macOS status bar development port monitor2025 · github.com · ▲128

  Port Kill helps you find and free ports and caches blocking your dev work. - treadiehq/port-kill

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  Run full iOS 16.5 firmware on Android Devices▲517

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 2d ago · github.com

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  /dev/null▲492

  a social network for devs

  Dev tools · 5d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 30d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 25d ago · openbot.run

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  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 22d ago · talanoa.email

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  I'm an airline pilot – I built interactive graphs/globes of my flights▲1,539

  Hey HN! Pilots everywhere are required to keep a logbook of all their flying hours, aircraft, airports, and so on. Since I track everything digitally (some people still just use paper logbooks!), I put together some data visualizations and a few 3D globes to show my flying history. This globe is probably my favourite so far: https://jameshard.ing/pilot/globes/all If you’ve got ideas for other graphs or ways to show this kind of data, I’d love to hear them!

  Life & fun · 2025 · jameshard.ing

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  Chronicle: Cursor for Slides▲1,212

  Stunning presentations with AI. No design skills required.

  AI · 2025 · chroniclehq.com

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  Bubble for native mobile apps (beta)▲1,026

  Build native mobile apps for iOS and Android without code.

  Dev tools · 2025 · bble.io

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  Twenty▲989

  Build your Enterprise CRM with an AI-friendly SDK

  Dev tools · 2025 · twenty.com

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  Pally - AI Relationship Management▲949

  All your connections, across all your socials.

  AI · 2025 · pally.com

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  Workout.cool – Open-source fitness coaching platform▲827

  I was the main contributor to workout.lol, an open-source fitness app to easily build a workout routine. The project had traction (1.4k GitHub stars, 95 forks, ~20K visits/month), but was eventually sold due to video licensing hurdles. The new owner stopped maintaining it, and the repo went abandoned. Over the next 9 months, I sent 15 emails to try to save it : no replies. Feature requests & issues were ignored. The community was left with a "broken" tool let's say. I couldn't just let it die So I built the new version from scratch with the same open-source spirit, but a better…

  Dev tools · 2025 · github.com