Autonomous system
AS15594 NETZQUADRAT Gladbacherstr. 74
Unclassified RIPE
Summary
netzquadrat
isp hosting transit business
Ninety-six neighbours on four blocks, and the AS handle ends in a house number.
What it's used for
- A provider's network. Four IPv4 prefixes and three IPv6 prefixes announced from Germany, twenty-four thousand addresses, across ninety-six observed BGP neighbours.
Notable
- The AS handle runs the company name straight into a street name and a house number, so the field that should identify the network gives a postal address instead.
- All four blocks follow one netname scheme: country code, a two-letter company abbreviation and the allocation date, with dates spread across eight years.
- The IPv4 holding is two
/19blocks and two/20blocks, an unusually regular shape for space collected over that long. - The three IPv6 prefixes are one
/34and two/36pieces carved out of it at widely separated offsets. - Twelve addresses were queried for reverse DNS and none returned a name.
Interesting
- Ninety-six neighbours is a peering-heavy network, far more connections than twenty-four thousand addresses would need for their own traffic. The value is in what passes through.
- A consistent netname scheme across four allocations and eight years means one person's convention outlived several rounds of paperwork, which is rarer in this data than it should be.
- Announcing two more specific pieces of an IPv6 block alongside the block itself is traffic engineering, and it is still uncommon enough on that protocol to be worth noting.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.75 |
| Megaport Dusseldorf IX | Düsseldorf, Germany | 194.146.118.43 |
Transit providers
14 upstream, 0 downstream and 22 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 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 24.58K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS15594- Registry name
- NETZQUADRAT
- Registrant
- NETZQUADRAT-MNT
- Abuse contact
- abuse@netzquadrat.de
- Registered
- 2002-04-21
- Last changed
- 2024-06-12
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 10 valid, 0 with no ROA
- ROAs
- 13 authorising AS15594
- ASPA
- 5 declared providers
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 157 naming AS15594
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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