Good news (at first glance): Silent Connection Ltd and Dolphin 1337 Limited, two UK-based corporations flagged by Spamhaus as being used for bulletproof hosting, were compulsory dissolved on January 28th and January 14th, respectively.

Unfortunately, their networks (AS215240 and AS215208) remain active...

Silent Connection quickly secured fresh IP blocks on January 26th through ZeXoTeK IT-Services (whose website, zexotek.de, oddly redirects to Google ). Similarly, Dolphin 1337 Limited acquired new IP space on February 4th.

Even after both companies' were dissolved, these IPs are still operational - effectively making them digital no man’s land.

Luckily, Spamhaus DROP users are protected by the following listings:

DROP 176.65.134.0/24 -> https://check.spamhaus.org/results?query=SBL673819

DROP 176.65.139.0/24 -> https://check.spamhaus.org/results?query=SBL673820

DROP 176.65.140.0/23 -> https://check.spamhaus.org/results?query=SBL673821

DROP 176.65.142.0/24 -> https://check.spamhaus.org/results?query=SBL673822

DROP 176.65.144.0/24 -> https://check.spamhaus.org/results?query=SBL673823

DROP 176.65.143.0/24 -> https://check.spamhaus.org/results?query=SBL673922

This incident highlights why robust customer vetting is a necessity. Silent Connection's imminent dissolution was already visible on the UK company register as of November 5th - a clear red flag.

Spamhaus recommends always vetting new customers, and checking their commercial registry data before providing services.

Find a link to the DROP Lists in the comments