Autonomous system
AS16024 GELSEN-NET Willy-Brandt-Allee 26
Unclassified RIPE
Summary
GELSEN-NET
isp telecom business
One netname is a sentence describing the equipment: access protocol, access server and address sharing.
What it's used for
- A city network operator. Fifteen IPv4 prefixes and two IPv6 prefixes announced from Germany, sixteen thousand six hundred and forty addresses, across one hundred and thirteen observed BGP neighbours.
Notable
- One block's netname is a phrase joined by hyphens: the dial-up-style access protocol, the word for a broadband access server, and a contraction for the system that shares one address between many subscribers. It describes the equipment rather than the customers.
- Four blocks carry a date of the first day of a year long before the registry existed, which is the placeholder used when the real date is unknown.
- The other netnames use the same country code and brand with real dates spread across three decades.
- The AS handle is the brand followed by a street name and a house number, with no city or country.
- One hundred and thirteen neighbours on sixteen thousand addresses is a very high ratio, the shape of a network that peers widely rather than buying transit.
- Two of eighteen queried addresses answered, the four octets hyphenated on a subdomain for the provider business.
Interesting
- Naming a block after address sharing is useful information leaking out of a form. It tells anyone reading that many subscribers sit behind each address, which matters for anyone trying to block, rate limit or geolocate one of them.
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 5 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.194.76 |
| DE-CIX Dusseldorf | Düsseldorf, Germany | 185.1.170.98 |
| DE-CIX Munich | Munich, Germany | 185.1.208.120 |
| DE-CIX Hamburg | Hamburg, Germany | 185.1.210.122 |
| RUHR-CIX | Ruhr, Germany | 185.1.197.2 |
Transit providers
19 upstream, 5 downstream and 40 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 15 prefixes · 16.64K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 17 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS16024- Registry name
- GELSEN-NET
- Registrant
- GR2386-RIPE-MNT
- Abuse contact
- noc@gelsen-net.de
- Registered
- 1970-01-01
- Last changed
- 2026-04-16
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 25 valid, 0 with no ROA
- ROAs
- 29 authorising AS16024
- ASPA
- no ASPA record
- IRR
- 100% registered · 25 of 25 announcements
- Route objects
- 85 naming AS16024
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: 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