Autonomous system
AS8422 NETCOLOGNE
Residential RIPE
Summary
NetCologne
isp residential legacy
NETCOLOGNE is NetCologne GmbH, the city carrier of Cologne and the surrounding Rhineland. It is one of Germany's largest municipal-utility-backed telecoms, running its own fibre, cable and DSL access network rather than reselling Deutsche Telekom's.
What it's used for
- Residential broadband and telephony across Cologne, Bonn, Leverkusen and the Rhine-Erft area, plus business connectivity and services for the region's schools and public bodies.
- The reverse DNS is decisive: subscriber addresses resolve as
cable-IP-ADDR.nc.deandxdsl-IP-ADDR.nc.deacross the big78.34.0.0/15,87.78.0.0/15and89.0.0.0/15blocks.
Notable
- A genuine eyeball network of roughly 570,000 IPv4 addresses, with heavy IPv6 deployment alongside it. Addresses here overwhelmingly front households in one German metropolitan region, so they geolocate tightly to Cologne.
- Its peering footprint is unusually large for a regional carrier: it is a long-standing presence at DE-CIX and neighbouring exchanges, which is how a city network keeps local traffic local.
Interesting
- NetCologne grew out of the city's public utility company, a distinctly German model in which the municipal power and water provider also lays the fibre. That is why an operator this size exists at all in a market otherwise dominated by national incumbents.
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 4 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.212 |
| LINX LON1 | London, United Kingdom | 195.66.224.172 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.209.62 |
| Peering.cz | Prague, Czech Republic | 185.0.20.68 |
| Megaport Frankfurt IX | Frankfurt, Germany | 62.69.146.5 |
| Megaport Dusseldorf IX | Düsseldorf, Germany | 194.146.118.3 |
Transit providers
30 upstream, 35 downstream and 105 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 47 prefixes · 572K addresses IPv6 11 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 58 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8422- Registry name
- NETCOLOGNE
- Registrant
- NETCOLOGNE-MNT
- Abuse contact
- abuse@netcologne.de
- Registered
- 2002-09-24
- Last changed
- 2026-07-28
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 4% valid · 2 valid, 49 with no ROA
- ROAs
- 4 authorising AS8422
- ASPA
- no ASPA record
- IRR
- 100% registered · 51 of 51 announcements
- Route objects
- 64 naming AS8422
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: 431 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