The Spamhaus Project1d ago

With ongoing discussion around a potential sixth Regional Internet Registry (RIR) for outer space allocations, as outlined in: https://datatracker.ietf.org/doc/draft-li-tiptop-address-space/ …it has become clear that governance of interplanetary IP allocations is no longer hypothetical.

🛰️ Recent incidents involving interference with critical satellite infrastructure demonstrate that space-based threats are no longer theoretical: https://news.satnews.com/2026/02/04/russia-intercepts-europes-key-satellites-placing-nato-satellite-at-risk/

For this reason... ⤵️

Show threadThe Spamhaus Project1d ago

...we're reviving and expanding a project that has contributed greatly to securing the Internet over decades: the CBL 🤩

Now reborn as the "Cosmic Blocklist", it's being expanded to allow the listing of IP addresses even in multiple planetary networks across the solar system, by appending the planet name to the actual internet address, thereby taking into account the inevitable existence of multiple internets in the near future! 🪐 ⤵️

Show threadThe Spamhaus Project1d ago

Learn more ➡️ https://www.spamhaus.org/resource-hub/spamhaus/spamhaus-cbl-is-reborn-now-interplanetary/

You can look up the status of an IP on another planet via:
<reverse-IP>.<PLANET>.cbl.spamhaus.org.

Try it with your favorite planet! 🪐

Resources | Spamhaus CBL is reborn… now interplanetary! | Spamhaus Project

From today, the CBL now extends beyond Earth, allowing the listing of IP addresses across multiple planetary networks in the solar system!

The Spamhaus Project
Show threadhallunke23 🇺🇦20h ago

CBL seems to be broken. Just tried to query an address and I got a "blocklist address is wrong" error. What's going on here?

host 5.3.6.1.6.3.8.2.4.1.8.3.2.4.7.4.1.8.3.6.2.4.7.4.9.4.2.4.7.3.5.1.sun.cbl.spamhaus.org
5.3.6.1.6.3.8.2.4.1.8.3.2.4.7.4.1.8.3.6.2.4.7.4.9.4.2.4.7.3.5.1.sun.cbl.spamhaus.org is an alias for blocklist.address.is.wrong.spamhaus.org.
blocklist.address.is.wrong.spamhaus.org has address 127.255.255.252

@spamhaus

Show threadThe Spamhaus Project
@hallunke23 inspect the announcement page and you might discover something hidden...
Apr 1 at 3:06pmWeb
Show threadhallunke23 🇺🇦16h ago
Ah, I see. The error is because the sun is too hot. (Other planets work.) I'll retry my query tonight when it's dark outside.🧌
@spamhaus