The downloads on this page are not yet ready for general-purpose production use. We’d love to hear what works and what doesn’t (that’s why they’re posted here), but don’t use them in any situation where failure could result in consequences that you’re unwilling to accept. For example, don’t use them with wallets that contain coins or names that you aren’t willing to sacrifice to science.

The more people test these downloads, the faster they’ll be ready for release. However, there are no guarantees of when, or if, these downloads will be released in final form.

As usual, it is a good idea to verify the hashes and signatures of these downloads (especially the ones not hosted on namecoin.org). The more people reproduced the hashes, the better. If you’re paranoid, run them inside an isolated virtual machine.

Namecoin Core

Things to Test

  • Full flow for registering names.
  • Full flow for updating and renewing names.
  • State display in the names list.
  • The above with mainnet, testnet, and regtest networks.
  • The above with encrypted locked, encrypted unlocked, and unencrypted wallets.

Known Issues

  • Windows builds not working (should be fixed in Beta 2)
  • macOS builds not working (should be fixed in Beta 2)

Lightweight SPV BitcoinJ Name Lookup Client

This is a drop-in replacement for Namecoin Core’s name lookup functionality (e.g. for browsing .bit domains with ncdns), which synchronizes faster and uses less storage, but trusts Namecoin miners more than Namecoin Core does.

You need to have Java installed:

  • If you’re using GNU/Linux, use your package manager.
  • If you’re using Windows, download it from the Oracle website. Make sure you right-click the .exe installer, click Properties, and click Digital Signatures. It should be signed by Oracle America, Inc. If it is not, do not install it.
  • We’re not sure about OS X. If anyone can contribute instructions for OS X, let us know.

If you’re using Windows, you will need to install the Microsoft Visual C++ 2010 Redistributable Package. Download for 64-bit Windows is here. Download for 32-bit Windows is here.

Download 0.1.1 Beta 1 (cross-platform JAR) (Hosted by Google Drive).

Hash: SHA256

bitcoinj-addons Namecoin Name Lookup Client
Version 0.1.1 Beta 1

db19dfcc23b750c799152d3ed8ff91bf67d8c64ea98992c4fe7940c75daa3514  bitcoinj-daemon-0.1.1-SNAPSHOT.jar
Version: GnuPG v2


Preliminary instructions are here.


ncdns is software for accessing .bit domain names. If you want to access .bit domain names, ncdns is most likely what you want to install.

See the ncdns documentation.

The ncdns Windows installer also automatically installs and configures Namecoin Core and Dnssec-Trigger/Unbound, and sets up TLS certificate validation in any supported web browsers that are installed (see documentation for a list of supported browsers). It’s basically all you need for browsing .bit domain names. Release signed by Hugo Landau.

Before running the ncdns Windows installer, you will need to install the Visual C++ Redistributable for Visual Studio 2012.

ncdns plain binaries are also available for most major operating systems. These are useful for advanced users or for users who are not on Windows. Using these will require setting up Namecoin Core and a recursive DNS resolver (e.g. Unbound) separately; they do not support TLS certificate validation (except for the Windows plain binaries, with additional setup required).

Known Issues

  • Build is not yet reproducible.


This is a tool that permits Namecoin naming (or any other naming method that speaks the DNS protocol) to be used with Tor, via the draft Prop279 pluggable naming API. .bit domains can point to IP addresses (A/AAAA records), DNS names (CNAME records), and onion services.

See the Namecoin Tor resolution documentation

Source code at GitHub.

Known Issues

  • Prop279 is still an early draft, and might change heavily. dns-prop279 will change accordingly.
  • tor doesn’t implement Prop279 (see above point); the TorNS shim is required if you want to use or test dns-prop279.
  • dns-prop279 doesn’t follow the current Namecoin Domain Names specification for onion service records (we might amend the specification to match dns-prop279’s behavior).
  • dns-prop279 doesn’t properly return error codes; all errors will be treated as NXDOMAIN.
  • dns-prop279 hasn’t been carefully checked for proxy leaks.
  • Using dns-prop279 will make you stand out from other Tor users.
  • Stream isolation for streams opened by applications (e.g. Tor Browser) should work fine. However, stream isolation metadata won’t propagate to streams opened by the DNS server. That means you should only use dns-prop279 with a DNS server that will not generate outgoing traffic when you query it. ncdns is probably fine as long as it’s using a full-block-receive Namecoin node such as Namecoin Core or libdohj-namecoin in leveldbtxcache mode. Unbound is not a good idea.
  • Nothing in dns-prop279 prevents the configured DNS server from caching lookups. If lookups are cached, this could be used to fingerprint users. ncdns has caching enabled by default.
  • DNSSEC support hasn’t been tested at all, and is probably totally unsafe right now. Only use dns-prop279 when you fully trust the configured DNS server and your network path to it.
  • No binaries available yet.
  • Build is not yet reproducible.