subnet.im

AS7973Mayo Foundation for Medical Education and Research

United StatesRegistryARIN

As of 10th November 2026, AS7973 (Mayo Foundation for Medical Education…), a network registered in the United States with ARIN, originates 15 IPv4 prefixes covering 137k addresses. By IPv4 address space that makes it the 1,827th-largest of the 80,733 networks we see originating IPv4, and the 545th-largest of 18,751 in the United States. It is seen behind 5 upstream networks, most often AS32787 (Akamai (Prolexic)) and AS15830 (Equinix, Inc.). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

15

IPv6 prefixes

0

IPv4 addresses

137k

IPv6 /64s

0

Upstream graph

The networks AS7973 is seen behind, one and two hops out, drawn from real AS paths.

AS7973Toward the internet core
Upstream graph for AS7973: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7973Mayo Foundation f…This networkAS57Northern Lights G…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS15830Equinix, Inc.AS32787Akamai (Prolexic)AS2381WiscNetAS6939Hurricane Electri…AS3549Lumen (fka. Globa…AS32590Valve CorporationAS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS7973 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

11

adjacent networks

Upstreams
545%
Peers
655%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS7973
NetworkCountryRelationshipPathsVantage pts
AS32787Akamai (Prolexic)USPeer91276
AS15830Equinix, Inc.NLPeer15276
AS3356Lumen (Level 3)USPeer3838
AS6461Zayo BandwidthUSPeer3636
AS57Northern Lights GigaPoPUSPeer22

Prefixes

The largest blocks AS7973 originates, widest first.

Largest prefixes originated by AS7973
PrefixAddressesVisibility
129.176.0.0/1665.5k76/76
129.176.0.0/198.2k76/76
129.176.32.0/198.2k76/76
129.176.64.0/198.2k76/76
129.176.96.0/198.2k76/76
129.176.128.0/198.2k76/76
129.176.160.0/198.2k76/76
129.176.192.0/198.2k76/76
129.176.224.0/198.2k76/76
129.176.136.0/212k76/76

Routing health

How AS7973's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%15

Propagation

  • Globally propagated90% of full-feed peers or more100.0%15
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 15 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS7973 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.