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AS33587Breckinridge Capital Advisors

United StatesRegistryARIN

As of 10th November 2026, AS33587 (Breckinridge Capital Advisors), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 512 addresses. By IPv4 address space that makes it the 49,308th-largest of the 80,723 networks we see originating IPv4, and the 10,553rd-largest of 18,750 in the United States. It is seen behind 2 upstream networks, most often AS46887 (Zayo (fka. Crown Castle)) and AS174 (Cogent Communications, LLC), and in front of 1 downstream network. None of its announcements have a valid RPKI ROA. 50% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

2

IPv6 prefixes

0

IPv4 addresses

512

IPv6 /64s

0

Upstream graph

The networks AS33587 is seen behind, one and two hops out, drawn from real AS paths.

AS33587Toward the internet core
Upstream graph for AS33587: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33587Breckinridge Capi…This networkAS174Cogent Communicat…AS46887Zayo (fka. Crown …AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS6461Zayo BandwidthAS47065USC / UFMG PEERIN…

Networks observed one and two hops upstream of AS33587 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

6

adjacent networks

Upstreams
233%
Peers
350%
Downstreams
117%

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

Upstreams of AS33587
NetworkCountryRelationshipPathsVantage pts
AS46887Zayo (fka. Crown Castle)USPeer7676
AS174Cogent Communications, LLCUSPeer6464

Prefixes

The largest blocks AS33587 originates, widest first.

Largest prefixes originated by AS33587
PrefixAddressesVisibility
38.97.57.0/2425657/76
162.212.110.0/2425676/76

Routing health

How AS33587'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%2

Propagation

  • Globally propagated90% of full-feed peers or more50.0%1
  • Partially propagated40% to 90%50.0%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS33587 started or stopped in this period.

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