ipv4.cat – your public IP address from any OS terminal
ipv4.cat – your public IP address from any OS terminal launched on November 4, 2019 with 20 votes, #746 of 3,203 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
ipv4.cat is a command-line tool that displays a user's public IP address from any operating system terminal. Launched in 2019, it provides a simple way for developers to quickly retrieve their public IP information without opening a web browser. The tool works across different operating systems, making it convenient for developers who spend significant time in terminal environments.
written from the facts on this page · September 2026
From the sources
ipv4.cat is a server that simply replies with your IP address on all TCP ports. This provides a way of determining your public IP address from command line with the least amount of typing possible, without requiring the installation of any software. Similar to portquiz.net, it also provides a way of checking for outbound firewall blocks. ipv4.cat differs from services like ifconfig.me in that it returns a raw TCP response and therefore doesn't require a HTTP client. ftp is recommended, as it is short, the most universal method across operating systems and is included in Windows by default (unlike telnetfrom about.ipv4.cat
Does a similar job
all alternatives →
aws_public_ips, a tool to fetch all public IPs tied to an AWS account2018 · github.com · ▲36Fetch all public IP addresses tied to your AWS account. Works with IPv4/IPv6, Classic/VPC networking, and across all AWS services - arkadiyt/aws_public_ips
More dev tools this month
the category →
Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.
Dev tools · 23h ago · github.com
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 29d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 27d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 24d ago · openbot.run
Talanoa▲346Hi 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
Source: Show HN post ↗
