AS12355 — HAMCOM-DE HeLi NET Telekommunikation GmbH & Co.

Network type: residential

AS12355 announces 5 IPv4 prefixes covering 66,560 addresses and 1 IPv6 prefixes.

About this network

A regional carrier in Westphalia, based in Hamm and trading its network under the HAMCOM name.

What it's used for

• Residential and business access over DSL and fibre. 66,560 addresses across twelve prefixes, one IPv6 /29, and 146 observed BGP neighbours.

Notable

• Reverse DNS labels both the technology and the town. Names run adsl-dyn-, adsl-fixed-, ftth-dyn- and ftth-mpc-dyn- under heliweb.de, with dsl-ham-dyn for Hamm and dsl-kam-dyn for Kamen.
• One sampled address answers as 212-37-55-254.as12355.net. The company registered its own AS number as a domain and puts reverse names under it.
• The netnames date the buildout from DE-HAMCOM-990310 through 20040227, 20051028, a large 20090504 batch covering seven of the twelve prefixes, and 20160906. One block breaks the pattern entirely and is named HELINET-FTTH.
• 146 neighbours against 66,560 addresses. That is a great deal of peering for a network of this size.

Interesting

• The name reads as its own history. HeLi NET is a municipal-utility venture out of Hamm and Lippstadt, and both ham and kam turn up in the reverse names as separate exchanges. City utilities in Germany had the ducts, the rights of way and the billing relationships already, which is why so many of them ended up selling broadband.
• Announcing seven prefixes registered on a single day in May 2009 is what a fibre build looks like in the registry: one application, one justification, and then years of announcing it piece by piece as the trenches were dug.

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

Announced prefixes

• 83.216.224.0/19
• 88.208.128.0/18
• 185.166.176.0/22
• 188.136.0.0/17
• 212.37.32.0/19
• 2001:14f0::/29

Upstream networks

• AS6939 Hurricane Electric LLC
• AS50629 LWLcom GmbH
• AS24482 SG.GS
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50300 CustodianDC Limited
• AS17639 Converge ICT Solutions Inc.
• AS42708 Glesys Sweden AB
• AS48185 team.blue NV
• AS34549 meerfarbig GmbH & Co. KG
• AS8551 Bezeq International Ltd.
• AS37721 Virtual Technologies & Solutions
• AS1836 green.ch AG
• AS48362 Stadtwerke Feldkirch
• AS34019 Hivane Association
• AS4657 StarHub Ltd
• AS12779 IT.Gate S.p.A.
• AS3216 PJSC "Vimpelcom"
• AS12552 GlobalConnect AB
• AS37100 SEACOM Limited
• AS3257 GTT Communications Inc.
• AS213241 TECHIT.BE SRL
• AS29632 Netassist International EOOD
• AS13030 Init7 (Switzerland) Ltd.
• AS293 ESnet
• AS50673 Serverius Holding B.V.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS50629 LWLcom GmbH
• AS24482 SG.GS
• AS48185 team.blue NV
• AS42708 Glesys Sweden AB
• AS17639 Converge ICT Solutions Inc.
• AS50300 CustodianDC Limited
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS34549 meerfarbig GmbH & Co. KG
• AS48362 Stadtwerke Feldkirch
• AS12552 GlobalConnect AB
• AS8551 Bezeq International Ltd.
• AS3216 PJSC "Vimpelcom"
• AS34019 Hivane Association
• AS4657 StarHub Ltd
• AS37721 Virtual Technologies & Solutions
• AS1836 green.ch AG
• AS37100 SEACOM Limited
• AS12779 IT.Gate S.p.A.
• AS3257 GTT Communications Inc.
• AS213241 TECHIT.BE SRL
• AS13030 Init7 (Switzerland) Ltd.
• AS29632 Netassist International EOOD
• AS293 ESnet
• AS33891 Core-Backbone GmbH

Routing security

• RPKI: 26 valid, 0 invalid and 0 not-found announcements; 15 ROAs.
• ASPA: none published.
• IRR: 96% of announcements registered; 26 route objects.
• Listed in as-sets: AS-DDITS:AS-PEERS, AS-DOCLER:AS-PEERS, AS-ECIX-DUS, AS-GREEN-PEERS, AS-GTTCUST, AS-GTTCUST6, AS-HELINET-V4, AS-HELINET-V6, AS-HURRICANEV6, AS-KPN, AS-MANDA-AMSIX-PEERS-V4, AS-MANDA-AMSIX-PEERS-V6, AS-MANDA-DECIX-PEERS-V4, AS-MANDA-DECIX-PEERS-V6, AS-RIS-RRC12, AS-TITANDECIX, AS1200:AS-AMS-IX-PEERS, AS203462:AS-NVC-DECIX_FRA_RS, AS34968:AS-AMS-IX-PEERS, AS34968:AS-AMS-IX-V6-PEERS, AS47841:AS-OPEN-PEERING, AS61180:AS-PEERS-AMSIX, AS6695:AS-DECIX-FRA-CONNECTED, AS6695:AS-DECIX-FRA-RS, AS6695:AS-DECIX-FRA-RS-V6.

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Megaport Dusseldorf IX — Düsseldorf, Germany
• Dortmund Internet exchange — Dortmund, Germany