AS15447 — AS-CM

Network type: hosting

AS15447 announces 5 IPv4 prefixes covering 5,632 addresses and 1 IPv6 prefixes.

About this network

Every answering address is a mail sender, named and grouped on purpose.

What it's used for

• A business messaging provider. Five IPv4 prefixes and one IPv6 /29 announced from the Netherlands, five and a half thousand addresses, across one hundred and thirty-five observed BGP neighbours.

Notable

• All six answering addresses use one form: the word mail, two octets, and a subdomain for email under the company's own domain.
• Those addresses fall in the two blocks whose netname marks them as infrastructure rather than customer space.
• The company's registered name contains a dot, so the holder is spelled like a domain name.
• The other three netnames follow country code, company and allocation date, spread across many years.
• Fifteen addresses were queried for reverse DNS and six returned a name.

Interesting

• Naming mail senders explicitly is the opposite of a leak. Receiving systems check that an address resolves and resolves back, so a sender that publishes clear names gets its mail delivered.
• Keeping those senders inside blocks labelled as infrastructure separates them from everything else the company runs, which limits the damage when one address gets a bad reputation.
• One hundred and thirty-five neighbours is a lot of direct connections, and for a messaging business it is the product: reaching networks directly is what makes delivery reliable.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 31.169.56.0/21
• 85.119.48.0/21
• 185.162.145.0/24
• 185.162.146.0/24
• 188.94.184.0/22
• 2a10:9d80::/29

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS20562 Broadband Hosting B.V.
• AS8220 COLT Technology Services Group Limited
• AS9002 RETN Limited
• AS24785 Broadband Hosting B.V.
• AS34549 meerfarbig GmbH & Co. KG
• AS174 Cogent Communications, LLC
• AS37721 Virtual Technologies & Solutions
• AS204092 Association GRIFON
• AS48362 Stadtwerke Feldkirch
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS48185 team.blue NV
• AS57463 NetIX Communications JSC
• AS34800 Securebit AG
• AS50673 Serverius Holding B.V.
• AS212024 Marc Schmitt
• AS6696 VERIXI SA
• AS20485 Joint Stock Company TransTeleCom
• AS50300 CustodianDC Limited
• AS56655 Gigahost AS
• AS12552 GlobalConnect AB

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS20562 Broadband Hosting B.V.
• AS8220 COLT Technology Services Group Limited
• AS9002 RETN Limited
• AS24785 Broadband Hosting B.V.
• AS34549 meerfarbig GmbH & Co. KG
• AS174 Cogent Communications, LLC
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS48362 Stadtwerke Feldkirch
• AS48185 team.blue NV
• AS17639 Converge ICT Solutions Inc.
• AS204092 Association GRIFON
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS57463 NetIX Communications JSC
• AS20485 Joint Stock Company TransTeleCom
• AS50673 Serverius Holding B.V.
• AS6696 VERIXI SA
• AS34800 Securebit AG
• AS212024 Marc Schmitt
• AS50300 CustodianDC Limited
• AS12552 GlobalConnect AB
• AS56655 Gigahost AS

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Neutral Internet Exchange — Amsterdam, Netherlands
• DE-CIX Dusseldorf — Düsseldorf, Germany
• DE-CIX Munich — Munich, Germany
• DE-CIX Hamburg — Hamburg, Germany