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wtf is github520?

521xueweihan/github520 — explained in plain English

Analysis updated 2026-05-18

★ 28,631PythonAudience · generalComplexity · 1/5Setup · easy

TL;DR

Speed up GitHub access by adding direct IP-to-hostname mappings to your computer's hosts file, bypassing slow DNS lookups.

Mindmap

mindmap
  root((repo))
    What it does
      Speeds up GitHub
      Bypasses DNS delays
      Maps IPs to domains
    How to use
      Edit hosts file
      Use SwitchHosts tool
      Shell commands
    Setup methods
      Manual copy-paste
      Auto-update hourly
      AdGuard integration
    Who needs it
      Slow GitHub regions
      Unreliable connections
      No install required
    Tech approach
      Python verification
      IP discovery
      Regular updates

Code map

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filefunction / class

Why would anyone build with this?

REASON 1

Speed up GitHub page loads and image display in regions with slow or unreliable DNS.

REASON 2

Automate hourly updates of IP mappings using SwitchHosts without manual intervention.

REASON 3

Subscribe to the mappings URL in AdGuard to filter DNS requests for faster GitHub access.

REASON 4

Apply a one-time hosts file update via shell command on Linux or macOS servers.

What's in the stack?

PythonHosts fileSwitchHostsAdGuardShell scripting

How it stacks up

521xueweihan/github520genesis-embodied-ai/genesis-worlddeepinsight/insightface
Stars28,63128,62528,609
LanguagePythonPythonPython
Setup difficultyeasyhardmoderate
Complexity1/54/53/5
Audiencegeneralresearcherresearcher

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 5min
License could not be detected automatically. Check the repository's LICENSE file before use.

Wtf does this do

GitHub520 is a project that speeds up access to GitHub by modifying your computer's "hosts" file, a local text file that maps website names to IP addresses. When GitHub loads slowly or images in GitHub projects fail to display, it is often because DNS resolution (the process of converting a website name like github.com into a numeric address) is taking a roundabout or blocked path. By adding a curated list of direct IP address mappings to your hosts file, this project bypasses the slow DNS lookup and connects you straight to GitHub's servers. The README is written primarily in Chinese and is aimed at users in regions where GitHub access is slow or unreliable. No software installation is needed, you copy a block of pre-tested IP-to-hostname mappings into your hosts file, which takes about five minutes. The project provides a URL that serves an always-updated version of these mappings, so you can refresh them regularly. For those who prefer automation, the README shows how to use a tool called SwitchHosts to subscribe to the mappings URL and auto-update hourly, as well as single-line shell commands for Linux and macOS to fetch and apply updates via a scheduled job. AdGuard (a DNS filtering app) users can also subscribe to the same URL as a custom DNS blocklist. The project is maintained using Python to find and verify the best IP addresses for each GitHub domain. It is relevant for anyone who finds GitHub slow to load and wants a no-cost, no-software fix.

Yoink these prompts

Prompt 1
How do I add the GitHub520 IP mappings to my hosts file on Windows/Mac/Linux?
Prompt 2
Show me how to set up SwitchHosts to auto-update GitHub IP addresses every hour.
Prompt 3
What's the shell command to fetch and apply GitHub520 mappings on my Linux server?
Prompt 4
Can I use GitHub520 with AdGuard, and if so how do I subscribe to the URL?
Prompt 5
Why is GitHub slow in my region, and will GitHub520 actually fix it?

Frequently asked questions

wtf is github520?

Speed up GitHub access by adding direct IP-to-hostname mappings to your computer's hosts file, bypassing slow DNS lookups.

What language is github520 written in?

Mainly Python. The stack also includes Python, Hosts file, SwitchHosts.

What license does github520 use?

License could not be detected automatically. Check the repository's LICENSE file before use.

How hard is github520 to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is github520 for?

Mainly general.

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