Autonomous system
AS8267 CYFRONET-AS Metropolitan Area Network Autonomous System
Education RIPE
Summary
ACC Cyfronet AGH (Kraków MAN)
education research university legacy
CYFRONET-AS belongs to the Academic Computer Centre Cyfronet AGH at the AGH University of Science and Technology in Kraków. Cyfronet operates the Kraków metropolitan academic network (the Kraków MAN) and is one of Poland's national high-performance computing centres.
What it's used for
- Serving the universities, institutes and schools connected to the Kraków MAN, and Cyfronet's own supercomputing and research infrastructure.
- The bulk of the space is the classic academic
149.156.0.0/16, alongside195.150.224.0/19and193.193.64.0/21. - Reverse DNS confirms the shape: campus hosts under
cyfro.net, and connected institutions carrying their own academic domains, for examplestatic-10.pwsztar.edu.plfor a state higher school in Tarnów.
Notable
- Institutional, not consumer. Addresses here belong to universities, research institutes and HPC systems, plus student and staff campus networks. There are no dynamic subscriber pools.
- The AS is an aggregator: a chunk of the space is not Cyfronet's own machines but the connected member institutions, so an address in the /16 may belong to any of several Kraków-area organisations.
- The
Metropolitan Area Networkin the AS description is literal — this is a city-scale academic network, the Polish MAN model, not a single campus.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
3 upstream, 0 downstream and 5 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 6 prefixes · 76.54K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8267- Registry name
- CYFRONET-AS
- Registrant
- AS8267-MNT
- Abuse contact
- abuse@cyfronet.pl
- Registered
- 1970-01-01
- Last changed
- 2017-11-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 71% valid · 5 valid, 2 with no ROA
- ROAs
- 5 authorising AS8267
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 7 naming AS8267
Reputation
Classification and threat
Education University, school or national research and education network.
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