Autonomous system
AS7973 MAYO - Mayo Foundation for Medical Education and Research
Unclassified ARIN
Summary
Mayo Foundation for Medical Education and Research
enterprise healthcare research legacy
MAYO is the Autonomous System of the Mayo Foundation for Medical Education and Research — the legal entity behind Mayo Clinic, the nonprofit academic medical center headquartered in Rochester, Minnesota.
What it's used for
- Mayo Clinic's enterprise network: hospitals, clinics, research institutes and the Mayo Clinic College of Medicine and Science, across its Minnesota, Arizona and Florida campuses and its regional health system.
- Clinical and corporate IT. rDNS across the space is uniformly
mayo.edu—router-128.mayo.eduandrouter2-128.mayo.edufor edge routing, plus internal-looking application and management hosts.
Notable
- Despite the
.edudomain and the "Medical Education and Research" name, this behaves as a large institutional enterprise network, not a campus ISP and not a public research network. There are no subscriber pools of any kind. - It announces
129.176.0.0/16, a legacy Class B, deaggregated into /19s — roughly 65,000 addresses. Traffic from this AS is clinicians, researchers and staff on Mayo's own estate, and its public-facing patient-portal and web presence. - Healthcare networks of this size are heavily segmented and egress through enterprise proxies, so outbound addresses are shared by very large numbers of users.
Interesting
- Mayo has held the AS number since 1997, and its
.edudomain reflects a genuine degree-granting medical school rather than a marketing choice.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 19 prefixes · 64.00K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 19 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS7973- Registry name
- MAYO
- Registrant
- Mayo Foundation for Medical Education and Research
- Abuse contact
- csoc@mayo.edu
- Registered
- 1997-03-10
- Last changed
- 2023-11-21
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 15 with no ROA
- ROAs
- 0 authorising AS7973
- ASPA
- no ASPA record
- IRR
- 100% registered · 15 of 15 announcements
- Route objects
- 6 naming AS7973
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: 449 networks and 1,846 prefixes, as published 2026-11-02. 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