Autonomous system
AS45576 CERNET2-TSINGHUA6-AS-AP Tsinghua University
Unclassified APNIC Educational/Research
Summary
Tsinghua University
education research ipv6 china
CERNET2-TSINGHUA6-AS-AP is operated by Tsinghua University.
What it's used for
- The address space carries IPv6 prefixes under the
2402:f000::/46block, consistent with the CERNET2 (China Education and Research Network) infrastructure. - The AS announces 17 IPv6 prefixes and 0 IPv4 addresses, with 3 observed neighbours, indicating a research and education network focused on IPv6 connectivity within China.
- Traffic from this AS consists of academic research, educational services, and institutional endpoints associated with Tsinghua University's campus and research facilities.
Notable
- The registry holder is listed as Tsinghua University, matching the announcer identity.
- Tsinghua University is a public research university in Beijing, China, founded in 1911, and this AS represents its participation in the national education and research network.
- The inventory consists entirely of IPv6 space, with no IPv4 prefixes announced or held in inventory.
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
1 upstream, 1 downstream and 3 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS24348 | CERNET2 IX at Tsinghua University | 147 |
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 0 prefixes · 0 addresses IPv6 17 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CN | China | 17 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS45576- Registry name
- CERNET2-TSINGHUA6-AS-AP
- Abuse contact
- abuse@cernet.edu.cn
- Registered
- 2008-12-12
- Last changed
- 2020-09-03
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Tsinghua University
- Network type
- Educational/Research
- Scope
- Asia Pacific
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- Website
- http://www.tsinghua.edu.cn
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS45576
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 2 naming AS45576
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