AS693

AS693 is a live, actively-routed autonomous system registered to the University of Notre Dame, currently announcing 4 IPv4 prefixes and 1 IPv6 prefix — this is a campus network in production use, not a dormant or legacy registration.

ARIN RDAP records the autnum's top-level registration event as 1990-07-23, making AS693 a long-tenured allocation; the record was last changed 2024-09-25. The registrant organization handle is UND-Z, with the AS name NOTRE-DAME-AS. Two separate routing-data sources (bgp.he.net and bgp.tools) corroborate the same prefix counts independently.

Notre Dame reaches the Internet through exactly two upstream providers, Indiana University / Indiana GigaPOP (AS19782) and Cogent Communications (AS174); CAIDA's AS-degree data confirms this precisely (2 provider relationships, 0 settlement-free peers, 0 customers), so AS693 has no distinct BGP peers beyond its two transit providers. The IPv4 footprint (~77,824 addresses, 304 x /24 equivalents) is fully covered by valid RPKI ROAs; the single IPv6 /41 relies on unauthenticated IRR-source matching, with no ROA published.

Operator-official detail beyond RDAP is thin: Notre Dame's IT site (oit.nd.edu) has no dedicated network-operations or peering-policy page, and AS693 has no PeeringDB profile, so its peering policy is not publicly documented. CAIDA's ASRank does, however, measure and rank the ASN directly: rank 13,386 globally, seen and clique-member-eligible in CAIDA's measurement graph, with a customer cone of 1 ASN (itself), 4 prefixes, and 77,824 addresses, and an AS-degree profile of 2 provider relationships with zero customers and zero peers — consistent with a single-campus stub network reaching the Internet solely via its two upstreams.

Exposure

Academic/eyeball network confined to the University of Notre Dame campus (Notre Dame, Indiana); no evidence of transit, hosting, or VPN-style third-party traffic that would broaden its abuse surface.

Abuse signal

No notable public abuse signal found as of 2026-07-18 — AS693 does not appear on the Spamhaus ASN-DROP list, and no NANOG-archive or seclists.org threads referencing abuse, spam, or botnet activity for AS693 were found via web search. This is a dated, sourced null finding, not a guarantee of a clean history.

RPKI

IPv4 announcements are fully ROA-covered (route-origin validated); the sole IPv6 prefix is unauthenticated, a modest residual hijack-risk gap typical of smaller R&E networks.

Operator

University of Notre Dame (ARIN org handle UND-Z; AS name NOTRE-DAME-AS) [Confirmed] — https://rdap.arin.net/registry/autnum/693

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/693

Allocated

1990-07-23 (ARIN RDAP autnum top-level registration event); last changed 2024-09-25 [Confirmed] — https://rdap.arin.net/registry/autnum/693 (corroborated by bgp.tools "Registration: July 23, 1990")

Org status

active [Confirmed] — https://rdap.arin.net/registry/autnum/693

Contacts

Admin/Tech — DomainAdmin, domainadmin@nd.edu, +1-574-631-5000, 370 ITC, Notre Dame, IN 46556; Abuse — University of Notre Dame Abuse, abuse@nd.edu, +1-574-631-8111 [Confirmed] — https://rdap.arin.net/registry/autnum/693

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-18 — not in Spamhaus ASN-DROP; no NANOG/seclists.org abuse threads found via web search

Network & routing

Network type

higher-education / research-and-education campus network (non-commercial); reaches Internet2's R&E backbone via the Indiana GigaPoP regional network [Likely] — https://internet2.edu/community/membership/member-list/, https://www.thequilt.net/members/indiana-gigapop/

Size

4 IPv4 prefixes announced (~77,824 addresses / 304 x /24 equivalents); 1 IPv6 prefix (a single /41, 128 x /48 equivalents) [Confirmed] — https://bgp.he.net/AS693, https://bgp.tools/as/693

Routing/peering

announced and live; two upstream providers, AS19782 (Indiana University / Indiana GigaPOP) and AS174 (Cogent Communications); CAIDA AS-degree confirms 2 provider / 0 peer / 0 customer relationships, so AS693 has no distinct settlement-free peers beyond its two transit upstreams

[Confirmed] — https://asrank.caida.org/asns/693 (corroborated by https://bgp.he.net/AS693, https://bgp.tools/as/693)

Peering policy

not publicly published; AS693 has no PeeringDB profile (as693.peeringdb.com redirects to a 404) [Unknown] — https://oit.nd.edu/services/

RPKI

IPv4 fully covered by valid ROAs; IPv6 prefix unauthenticated (IRR-source matching only, no ROA) [Likely] — https://bgp.tools/as/693

CAIDA AS rank / customer cone

rank 13,386 (seen=true, cliqueMember=true); customer cone = 1 ASN, 4 prefixes, 77,824 addresses; AS-degree = 2 total / 0 customer / 0 peer / 2 provider [Confirmed] — https://asrank.caida.org/asns/693

Notable usage

campus network for University of Notre Dame — wired and wireless (eduroam, ND-Guest, 12,000+ indoor access points) connectivity for students, faculty, staff, and research computing (Notre Dame Center for Research Computing) [Likely] — https://oit.nd.edu/initiatives/wireless-first/, https://news.nd.edu/news/notre-dame-center-for-research-computing-established/

Related ASNs

none identified in this pass [Unknown]

Analyst note

Live, routed campus ASN with a first-party ARIN allocation date of 1990-07-23; CAIDA ASRank confirms a measured (not merely absent) footprint — rank 13,386, singleton customer cone, two provider relationships, zero customers/peers, consistent with a single-campus stub network. Peering policy remains genuinely Unknown due to sparse public disclosure typical of smaller academic networks.