AS681

AS681 is an actively-routed campus network ASN registered to the University of Waikato in Hamilton, New Zealand, currently announcing three IPv4 prefixes (768 addresses) and no IPv6 space, reaching the internet as a single-homed stub through New Zealand's national research-and-education network operator, REANNZ.

The registry record (APNIC RDAP, since APNIC is the delegated RIR for this range) lists AS681 as active under the name WAIKATOUNI-AS-AP, with a top-level registration event dated 2023-02-03. That is the RIR record's own registration/last-changed timestamp for the autnum object, not necessarily the date the ASN first went into service — live BGP visibility for this ASN traces back to at least August 2000, so the RDAP date likely reflects a database re-registration or record migration rather than original allocation. A third-party aggregator figure of "2002-08-01" surfaced during research but could not be traced to any first-party APNIC document, so it is treated as an unverified database artifact and not recorded.

Routing telemetry is fully consistent across sources: RIPEstat shows all three announced /24s (192.73.21.0/24, 192.107.171.0/24, 192.107.172.0/24) visible to 325 of 325 RIS peers, and CAIDA AS Rank places AS681 at global rank 54406 with a customer cone limited to itself (2 prefixes, 512 addresses) — a single-homed stub network with one upstream provider, zero peers, and zero customers.

The likely upstream is AS38022 (REANNZ), based on a single third-party BGP looking-glass source rather than a first-party confirmation, and no documented peering policy or PeeringDB network record exists for AS681, consistent with a campus network that reaches the internet solely through its NREN rather than operating open peering of its own.

Operator

University of Waikato, Hamilton, New Zealand [Confirmed] — https://rdap.apnic.net/autnum/681, https://www.waikato.ac.nz/

Country / RIR

NZ, APNIC [Confirmed] — https://rdap.apnic.net/autnum/681

Allocated (RIR registration event)

2023-02-03 (APNIC autnum top-level registration/last changed event, timestamp 2023-02-03T04:32:34Z); an unsourced third-party "2002-08-01" figure could not be traced to a first-party APNIC record and was not adopted [Confirmed] — https://rdap.apnic.net/autnum/681

Org status

active; abuse contact operator@waikato.ac.nz validated by APNIC 2026-01-06; NOC noc@waikato.ac.nz, +64 7 838 4381 [Confirmed] — https://rdap.apnic.net/autnum/681

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-18 in Spamhaus DROP/ASN-DROP, NANOG archives, or BGP hijack-incident sources; unrelated to the 2021 Waikato DHB ransomware incident (separate organization) [Likely] — https://www.spamhaus.org/blocklists/do-not-route-or-peer/, https://www.rnz.co.nz/news/national/442795/waikato-hospitals-hit-by-cyber-security-incident

Network & routing

Network type

higher-education/research campus network, connected via New Zealand's NREN operator REANNZ; not a commercial ISP or transit provider [Likely] — https://www.reannz.co.nz/

Routing/peering

single-homed stub, CAIDA degree provider:1, customer:0, peer:0; observed upstream AS38022 REANNZ (single-source) [Likely] — https://bgp.he.net/AS681; full RIS visibility 325/325 v4 peers [Confirmed] — https://stat.ripe.net/AS681

CAIDA AS Rank

54406; clique member; customer cone = 1 ASN (itself), 2 prefixes, 512 addresses [Confirmed] — https://asrank.caida.org/asns/681

Peering policy

not publicly documented; no PeeringDB network record found [Unknown] — https://bgpview.io/asn/681

RPKI

Originated Valid for all 3 announced prefixes per bgp.he.net; one prefix shows an IRR-registration mismatch; not cross-verified against RIPEstat's own validator [Likely] — https://bgp.he.net/AS681

ASN / name

AS681, WAIKATOUNI-AS-AP [Confirmed] — https://rdap.apnic.net/autnum/681

Announced prefixes

3x IPv4 /24 (192.73.21.0/24, 192.107.171.0/24, 192.107.172.0/24; 768 addresses); 0 IPv6 [Confirmed] — https://stat.ripe.net/AS681, https://bgp.he.net/AS681

First/last seen

first seen 2000-08-18 (140.200.128.0/24); last seen 2026-07-18 (192.107.172.0/24) [Confirmed] — https://stat.ripe.net/AS681

Analyst note

Actively-routed campus ASN; RDAP top-level registration date (2023-02-03) likely reflects a registry record update rather than original allocation, since BGP visibility predates it back to 2000, but per project policy the RIR's own top-level event is recorded as allocated_date.