Autonomous system
AS12355 HAMCOM-DE Hamm, Germany
Residential RIPE
Summary
HeLi NET Telekommunikation
isp eyeball fiber legacy
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-andftth-mpc-dyn-underheliweb.de, withdsl-ham-dynfor Hamm anddsl-kam-dynfor 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-990310through20040227,20051028, a large20090504batch covering seven of the twelve prefixes, and20160906. One block breaks the pattern entirely and is namedHELINET-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
hamandkamturn 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 4 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.240 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.208.76 |
| Megaport Dusseldorf IX | Düsseldorf, Germany | 194.146.118.144 |
| Dortmund Internet exchange | Dortmund, Germany | 185.1.18.35 |
Transit providers
31 upstream, 0 downstream and 44 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 12 prefixes · 66.56K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 13 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS12355- Registry name
- HAMCOM-DE
- Registrant
- AS12355-MNT
- Abuse contact
- abuse@helinet.de
- Registered
- 2002-01-04
- Last changed
- 2025-05-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 26 valid, 0 with no ROA
- ROAs
- 15 authorising AS12355
- ASPA
- no ASPA record
- IRR
- 100% registered · 26 of 26 announcements
- Route objects
- 26 naming AS12355
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-17. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere