Fast IP Ping Mod (1.21.11, 1.20.6) – Disables Reverse DNS Lookup

Fast IP Ping is a client-side optimization mod that eliminates laggy reverse DNS lookups when pinging or connecting to Minecraft servers using literal IP addresses, available for Fabric, Forge, and NeoForge mod loaders.

Every Minecraft player who connects to private servers, SMPs, or LAN worlds using raw IP addresses has experienced the same frustrating pause — you click "Refresh" on your server list, and it takes several seconds before the ping even shows up. The culprit is a reverse DNS lookup that Java performs on literal IP addresses, a process that's completely unnecessary for servers that don't have associated domain names. Fast IP Ping, created by fallen-breath, solves this problem with surgical precision. Originally extracted from the yeetServerIpReversedDnsLookup option in the TweakerMore mod, it has since earned over 14 million downloads as a standalone solution — a testament to just how widespread this annoyance really is.

Key Features of Fast IP Ping

• Eliminates Reverse DNS Lookup Delays — When Java encounters a literal IP address, it attempts a reverse DNS lookup to find a hostname. For most non-loopback IPs, no domain name exists, so the lookup hangs for 1 to 5 seconds before timing out. Fast IP Ping bypasses this entirely by setting the domain directly to the IP string, giving you near-instant server pings.
• Faster Server List Pinging — The server list screen is where most players notice the lag. Without this mod, every IP-based server in your list triggers its own reverse DNS lookup when refreshing. With Fast IP Ping installed, your server list populates noticeably faster, especially if you have multiple direct-IP servers saved.
• Faster Server Connections — The same reverse DNS delay that slows down pinging also affects the actual connection process. Fast IP Ping shaves those wasted seconds off your join time, getting you into the game quicker when connecting via literal IP addresses.
• Client-Side Only — You don't need to convince your server admin to install anything. Fast IP Ping runs entirely on your client, which means you can drop it into your mods folder and immediately benefit regardless of what the server is running. No server-side configuration needed.
• Multi-Loader Support — Whether you use Fabric, Forge, or NeoForge, Fast IP Ping has you covered. This flexibility means you don't have to switch mod loaders just to get this quality-of-life fix, and it slots neatly into whatever modpack setup you already have.
• No Extra Dependencies — Unlike many optimization mods that require Fabric API or other library mods, Fast IP Ping works completely standalone. Install the jar file and you're done — no dependency chains to manage or version conflicts to troubleshoot.
• Broad Version Coverage — With support spanning from Minecraft 1.17 all the way through 26.1, Fast IP Ping covers virtually every modern Minecraft version. You won't lose this quality-of-life improvement when updating your game.

How to Install Fast IP Ping

1. Install your preferred mod loader: Fabric, Forge, or NeoForge. Make sure the loader version matches your Minecraft version.
2. Download the correct Fast IP Ping jar file for your Minecraft version and mod loader from the download table below.
3. Open your Minecraft installation directory. On Windows, press Win + R, type %appdata%\.minecraft, and hit Enter.
4. Place the downloaded .jar file into the mods folder. If the folder doesn't exist, create it.
5. Launch Minecraft through your mod loader profile. The mod activates automatically — no configuration is needed.

Requirements & Compatibility

What's New

• Added support for Minecraft 26.1 (Fabric only for now)
• Build artifact: fast-ip-ping-v1.0.9-mc26.1-fabric.jar
• Forge and NeoForge support for 26.1 is expected in a future update
• Continued maintenance from the open-source repository on GitHub

Pros and Cons

Alternatives to Fast IP Ping

• TweakerMore — The parent mod that Fast IP Ping was originally extracted from, offering dozens of client-side tweaks and quality-of-life improvements including the same DNS fix plus many more options.
• Sodium — A widely-used rendering optimization mod that dramatically improves FPS and overall client performance, complementing the network-side fix that Fast IP Ping provides.
• Krypton — A network stack optimization mod for Fabric that improves Minecraft's networking code, making it a natural companion alongside Fast IP Ping for a smoother multiplayer experience.

Download Fast IP Ping

Always download mods from official sources to stay safe.

Frequently Asked Questions

Does Fast IP Ping work on servers that use domain names?

No — Fast IP Ping only affects servers whose addresses are literal IP addresses (like 192.168.2.10:25565). If you connect using a domain name such as play.example.com, the mod has no effect because the reverse DNS lookup issue does not apply to those connections.

Is Fast IP Ping compatible with other optimization mods like Sodium or Lithium?

Yes — Fast IP Ping is fully compatible with other optimization mods. It targets a very specific part of Java's networking stack (reverse DNS lookups) that doesn't overlap with rendering or server-tick optimizations. You can safely run it alongside Sodium, Lithium, Krypton, and similar mods.

Do I need Fabric API or any other library mod to run Fast IP Ping?

No — Fast IP Ping has zero dependencies. You only need your chosen mod loader (Fabric, Forge, or NeoForge) installed. Drop the jar file into your mods folder and it works immediately without any additional libraries.

Does this mod affect server-side performance or require server installation?

No — Fast IP Ping is entirely client-side. It modifies how your game client resolves server addresses before connecting, so the server never knows it's installed. No server-side setup or admin permission is required.

How much faster will my server list load with Fast IP Ping?

You can expect a 1 to 5 second reduction in ping time per IP-based server, according to the mod's documentation. The actual improvement depends on your network environment and how many literal-IP servers you have in your list. Players with several direct-IP servers saved will notice the most dramatic difference when refreshing the server list.

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