asn.dev

Autonomous system

AS21324 OSW

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly PL
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

OSW Osrodek Studiów Wschodnich

Poland · AI-generated

education business poland

The AS handle OSW is held by OSW Osrodek Studiów Wschodnich im. Marka Karpia w Warszawie.

What it's used for

  • The space carries a single IPv4 prefix, 195.187.133.0/24, with the netname OSW-NET and registrant IRT-CERT-GOV-PL; NASK LIR.
  • The inventory consists of 256 IPv4 addresses across 1 prefix, with 0 IPv6 prefixes announced.
  • With 1 observed neighbour, the low address-to-neighbour ratio suggests a small, isolated site or internal corporate estate rather than a transit or large access network.

Notable

  • The registrant IRT-CERT-GOV-PL; NASK LIR is a Polish government and national registry entity, which may indicate the address space is managed under national infrastructure or leased from a government body.
  • The address inventory is minimal, consisting of a single /24 block, which fits the profile of a specific institutional site rather than a broad service provider.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS8308PANSTWOWY INSTYTUT BADAWCZY59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
PLPoland1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21324
Registry name
OSW
Registrant
OSRODEK STUDIoW WSCHODNICH IM. MARKA KARPIA W WARSZAWIE
Abuse contact
abuse@osw.waw.pl
Registered
2001-11-01
Last changed
2020-11-16
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS21324
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS21324

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: 442 networks and 1,779 prefixes, as published 2026-10-21. 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

Cross-check