Supabase Unbanned but Still Not Working? How to Flush Your DNS Cache on Windows and Mac

On March 3, 2026, Supabase officially confirmed the end of an agonizing 8-day backend nightmare for the Indian developer community, successfully engaging with the Ministry of Electronics and Information Technology (MeitY) to reverse an ISP-level block. However, while the ban is officially lifted, thousands of developers on networks like Jio and Airtel are waking up to find their applications still timing out. Because ISP DNS propagation can take up to 24 hours, your local machine might still be clinging to outdated, blocked routing data; here is how to force your system to recognize the unban immediately.

Supabase Ban Resolution: What Just Happened?

Between February 24 and March 3, 2026, Indian internet service providers, including Reliance Jio, Airtel, and ACT Fibernet, implemented a DNS-level block on all *.supabase.co domains. This was executed under Section 69A of the Information Technology Act.

The block caused catastrophic disruptions for India’s thriving startup ecosystem, breaking authentication flows, database queries, and API calls for hundreds of thousands of live production applications. Following intense public outcry and direct negotiations with MeitY, Supabase successfully resolved the issue, and the government order was withdrawn.

Why is Supabase Still Down for You? (The DNS Propagation Problem)

To understand why your app is still throwing 525 SSL handshake errors or connection timeouts, you have to understand how the ban was implemented: DNS Poisoning.

When the government ordered the block, ISPs did not turn off Supabase’s servers. Instead, they altered their Domain Name System (DNS) ledgers. When your computer asked, “Where is supabase.co?”, the ISP returned a fake “sinkhole” IP address instead of Supabase’s real location.

Even though the ISPs have now corrected their ledgers, your local computer’s operating system is designed to remember (or “cache”) recent DNS lookups to load websites faster. Your machine is currently remembering the government’s “poisoned” IP address. You must manually clear this memory to force your computer to ask the ISP for the updated, unbanned IP address.

How to Flush Your DNS Cache on Windows

For developers using Windows 10 or Windows 11, clearing the DNS resolver cache requires a simple command line execution.

Step-by-Step Command Prompt Guide

1. Open the Start Menu: Press the Windows key on your keyboard.
2. Search for Command Prompt: Type cmd into the search bar.
3. Run as Administrator: Right-click on the “Command Prompt” app and select Run as administrator. (Click “Yes” if prompted by User Account Control).
4. Execute the Command: In the black terminal window, type the following command exactly as written and press Enter:
   • ipconfig /flushdns
5. Confirmation: You should immediately see a message stating: “Successfully flushed the DNS Resolver Cache.”
6. Restart your Browser: Close and reopen your browser or local development server, and attempt to access your Supabase dashboard.

How to Flush Your DNS Cache on Mac (macOS)

Apple’s macOS handles DNS caching slightly differently depending on the operating system version, but the Terminal command for modern macOS versions (Monterey, Ventura, Sonoma, and newer) remains consistent.

Step-by-Step Terminal Guide

1. Open Spotlight Search: Press Command + Space on your keyboard.
2. Open Terminal: Type Terminal and press Enter.
3. Execute the Command: Copy and paste the following string into the terminal window and press Enter:
   • sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
4. Enter Your Password: Because this is a sudo (Superuser DO) command, macOS will ask for your computer’s login password. Note: As you type your password, no characters will appear on the screen. This is normal. Just type it and press Enter.
5. Completion: macOS does not provide a success message. If it returns to a new command line prompt without an error, the cache has been successfully flushed.

What to Do If Flushing DNS Doesn’t Work

If you have flushed your local cache and Supabase is still inaccessible, the delay is likely sitting at your router or your specific local ISP node.

Reverting Temporary Workarounds

During the 8-day outage, many developers implemented temporary survival tactics. Now that the native block is lifted, these workarounds might actually cause conflicts.

• Revert Custom DNS: If you switched your router or OS network settings to Cloudflare (1.1.1.1) or Google (8.8.8.8), you can now safely revert to your ISP’s default automated DNS (though keeping Cloudflare is generally a good practice for speed and privacy).
• Disable VPNs/WARP: Turn off Cloudflare WARP or any commercial VPNs you used to bypass the block.
• Restart Your Router: Your home or office Wi-Fi router also has a DNS cache. Unplug your router from the wall, wait 30 seconds, and plug it back in to force it to pull fresh routing tables from Jio or Airtel.

The resolution of the Supabase ban is a massive relief for India’s tech sector, proving the efficacy of constructive dialogue between global platforms and regulatory bodies. By taking 60 seconds to flush your DNS cache on Windows or Mac, you can bypass the tedious 24-hour ISP propagation window and get your backend infrastructure and your business back online immediately.

Tags: Flush DNS Cache Windows and Mac, Supabase Unbanned India, Supabase MeitY Block, Clear DNS Mac, ipconfig flushdns, Fix Supabase Timeout, DNS Propagation, Developer Tools 2026.