Autonomous system
AS33891 CORE-BACKBONE
Hosting RIPE
Summary
Core-Backbone GmbH
transit backbone hosting
A German network operator running a large European Tier-2 IP transit and backbone network (CORE-BACKBONE), based in Nuremberg. It sells transit, peering, and connectivity to ISPs, hosting companies, and enterprises across Europe.
What it's used for
- Carrying transit and peering traffic for downstream networks, plus some directly hosted infrastructure and colocation customers.
Notable
- Primarily a carrier/transit backbone rather than a retail hosting brand, so addresses here are often upstream connectivity for other networks.
- Densely peered at major European internet exchanges (DE-CIX and others).
Interesting
- Core-Backbone is well known in the European peering community for its broad exchange presence and open peering posture.
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 25 exchanges in 14 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.195.147 |
| LINX LON1 | London, United Kingdom | 195.66.224.238 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.209.128 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.119.245 |
| France-IX Paris | Paris, France | 37.49.237.55 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.116 |
| TPIX - Internet Exchange | Warsaw, Poland | 195.149.234.87 |
| London Network Access Point | London, United Kingdom | 5.57.82.220 |
Transit providers
1 upstream, 1,848 downstream and 2,022 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS56655 | Gigahost AS | 1 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 0 prefixes · 0 addresses IPv6 0 prefixes
This network announces no prefixes we can see.
Registry
Allocation record
- Registry
- RIPE
- Handle
AS33891- Registry name
- CORE-BACKBONE
- Registrant
- CORE-BACKBONE
- Abuse contact
- abuse@core-backbone.com
- Registered
- 2004-09-01
- Last changed
- 2023-07-20
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 57 authorising AS33891
- ASPA
- 4 declared providers
- IRR
- 0% registered · 0 of 1 announcements
- Route objects
- 25 naming AS33891
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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