AS679

AS679 (TUNET-AS) is the actively routed autonomous system of Technische Universität Wien (TU Wien, Vienna University of Technology), Austria's public technical university, and it is announcing live production traffic today — two IPv4 prefixes and one IPv6 prefix — not a dormant or legacy-inactive ASN despite its low-numbered, pre-RIR origin.

The ASN carries a RIPE RDAP top-level registration date of 2002-08-28 and a last-changed date of 2025-06-13, corroborated independently by bgp.he.net. It sits within the original IANA 16-bit AS 1–1876 block once assigned by ARIN, and is now administered under RIPE NCC via ACOnet, Austria's national research-and-education network (NREN), which serves as its sole upstream.

Routing data is consistent across sources: 128.130.0.0/15 and 192.35.240.0/22 (132,096 IPv4 addresses total), seen by all 325 RIPE RIS IPv4 peers, plus a thinly-visible IPv6 prefix (2001:629::/32, 1 of 321 RIS v6 peers). CAIDA ranks it #13,009 globally with a customer cone limited to itself — one upstream (AS1853/ACOnet), zero peers, zero customers, and no recorded IXP membership.

Operationally, AS679 underlies "TUnet," TU Wien's campus network (TUwired, TUwlan, TUvpn, TUfirewall), run by the university's Campus IT division (formerly ZID). It serves roughly 26,585 students and 6,029 employees across roughly 19,479 networked systems, per the operator's own site.

Operator

Technische Universität Wien (TU Wien), operated by its Campus IT division (formerly ZID) [Confirmed] — https://www.tuwien.at/en/, https://www.it.tuwien.ac.at/en/

Country / RIR

AT, RIPE NCC (legacy IANA 1–1876 block, originally ARIN-assigned, now RIPE/ACOnet-administered) [Confirmed] — https://rdap.db.ripe.net/autnum/679, https://stat.ripe.net/AS679

Allocated / last changed

2002-08-28 (RDAP autnum top-level registration event) / 2025-06-13 (last changed) [Confirmed] — https://rdap.db.ripe.net/autnum/679, https://bgp.he.net/AS679

Org status

active public Austrian technical university, founded 1815; Campus IT is an active operating division [Confirmed] — https://www.tuwien.at/en/

Contacts

abuse@tuwien.ac.at; trouble@noc.tuwien.ac.at; security@tuwien.ac.at [Confirmed] — https://stat.ripe.net/data/abuse-contact-finder/data.json?resource=679, https://whois.ipip.net/AS679

Security/abuse context

no ASN-level abuse/blocklist signal found as of 2026-07-18; TU Wien disclosed an Active Directory security incident in January 2026 (institutional, not ASN-routing abuse) [Confirmed for the incident; Likely for the absence-of-abuse-signal finding] — https://www.tuwien.at/en/tu-wien/organisation/central-divisions/information-security/security-incident-jaenner-2026

Network & routing

Network type

Academic/R&E campus network ("TUnet"); transit via ACOnet (Austrian NREN) onward to GÉANT [Confirmed] — https://www.it.tuwien.ac.at/en/services/network-infrastructure-and-server-services

Size

2 IPv4 prefixes / 132,096 addresses (128.130.0.0/15, 192.35.240.0/22); 1 IPv6 prefix (2001:629::/32) [Confirmed for IPv4; Likely for IPv6 identity] — https://stat.ripe.net/data/announced-prefixes/data.json?resource=679, https://bgp.he.net/AS679

Routing/peering

sole upstream AS1853 (ACOnet); zero settlement-free peers; zero customers; CAIDA AS rank 13,009 [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/679

Peering policy

Unknown/not published — no public peering-policy page on TU Wien's own site; connectivity obtained as an ACOnet NREN participant, not direct settlement-free peering [Unknown] — https://www.it.tuwien.ac.at/en/

RPKI

mixed — IPv6 prefix flagged ROA-signed/Invalid by bgp.he.net; IPv4 not independently re-verified live [Likely] — https://bgp.he.net/AS679

IX presence

none confirmed; RDAP remarks list AS64765/AS-ACO-IX alongside ACOnet as a route-object legend, not confirmed direct IX membership [Unknown] — https://rdap.db.ripe.net/autnum/679

Notable usage

campus network for ~26,585 students and ~6,029 employees across ~19,479 networked systems; underlies TUcloud, TUfiles, TUWEL, TUaccount [Confirmed] — https://www.tuwien.at/en/, https://www.it.tuwien.ac.at/en/

Related ASNs

AS1853 (ACOnet, upstream); AS64765 (AS-ACO-IX, remark reference); AS6830 (teleweb, remark reference) [Confirmed for AS1853; Likely for the other two] — https://rdap.db.ripe.net/autnum/679, https://bgp.he.net/AS679

ASN / name

AS679, TUNET-AS [Confirmed] — https://rdap.db.ripe.net/autnum/679

Analyst note

actively routed academic ASN, not dormant; the only genuinely uncertain items are IPv6 prefix confirmation, IX presence, and live per-prefix RPKI validation, all honestly tagged rather than asserted.