Autonomous system
AS12329 TMR
Unclassified RIPE NSP
Summary
TMR / Glasfaser Ruhr
isp fiber business legacy
Glasfaser Ruhr is a fibre network in the Ruhr, Germany's old industrial heartland, and it carries other companies' address space as well as its own.
What it's used for
- Regional fibre connectivity. 24,832 addresses across 20 announced prefixes, with 156 observed BGP neighbours — far more interconnection than a network this size needs for itself.
Notable
- Four different companies appear as registrants. Alongside the
DE-GLASFASER-*blocks there isDE-SKYSYSTEMS-20170811registered to SkySystems IT GmbH,SYMRISE-194-45-52-0-22registered to Symrise AG, and two blocks registered to spaixx AG. - The
DE-GLASFASER-*netnames date the growth:20030210,20030219,20160531,20180314. - One IPv6 allocation,
2001:7d8::/32. Reverse DNS runs underglabodns.dewith the octets written backwards, as in254-114-154-185-glabodns.de.
Interesting
- One block carries the netname
NET-19840101— a netname that is nothing but a date, the 1st of January 1984. That is far earlier than the address range it sits on could have been assigned, so it reads as a default value that got written into the registry and stayed there, the way a placeholder date does when nothing downstream validates it. - Symrise makes flavours and fragrances, and its network appearing here is the ordinary case for a regional fibre operator: the customers are the industrial firms in its footprint, and they keep their own address space while the carrier does the announcing.
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 6 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.194.80 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.210.117 |
| DE-CIX Dusseldorf | Düsseldorf, Germany | 185.1.171.17 |
| Megaport Frankfurt IX | Frankfurt, Germany | 62.69.146.37 |
| Megaport Dusseldorf IX | Düsseldorf, Germany | 194.146.118.48 |
| RUHR-CIX | Ruhr, Germany | 185.1.197.3 |
Transit providers
27 upstream, 10 downstream and 58 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 20 prefixes · 24.83K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 21 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS12329- Registry name
- TMR
- Registrant
- glabo
- Abuse contact
- abuse@glasfaser-ruhr.net
- Registered
- 2002-08-11
- Last changed
- 2026-07-07
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Glasfaser Ruhr
- Network type
- NSP
- Scope
- Regional
- Traffic ratio
- Balanced
- Peering policy
- Open
- IRR as-set
RIPE::AS-TMR- Present at
- 6 exchanges
- Facilities
- 5 facilities
- Website
- https://www.glasfaser-ruhr.de/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 62% valid · 13 valid, 8 with no ROA
- ROAs
- 14 authorising AS12329
- ASPA
- no ASPA record
- IRR
- 100% registered · 21 of 21 announcements
- Route objects
- 92 naming AS12329
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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