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AS53873Bexar Datacenter

United StatesRegistryARIN

As of 11th November 2026, AS53873 (Bexar Datacenter), a network registered in the United States with ARIN, originates 4 IPv4 prefixes covering 1.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 30,398th-largest of the 80,747 networks we see originating IPv4, and the 6,908th-largest of 18,752 in the United States. It is seen behind 1 upstream network, most often AS3356 (Lumen (Level 3)), and in front of 1 downstream network. 40% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

1.8k

IPv6 /64s

4.3B

Upstream graph

The networks AS53873 is seen behind, one and two hops out, drawn from real AS paths.

AS53873Toward the internet core
Upstream graph for AS53873: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS53873Bexar DatacenterThis networkAS3356Lumen (Level 3)AS2914NTT America, Inc.AS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS53873 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

4

adjacent networks

Upstreams
125%
Peers
250%
Downstreams
125%

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

Upstreams of AS53873
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer505138

Prefixes

The largest blocks AS53873 originates, widest first.

Largest prefixes originated by AS53873
PrefixAddressesVisibility
64.132.4.0/221k76/76
74.203.171.0/2425676/76
74.203.251.0/2425676/76
97.77.87.0/2425676/76
2604:520::/324.3B × /6462/63

Routing health

How AS53873'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

  • Valid40.0%2
  • Invalid0.0%0
  • No ROA60.0%3

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS53873 started or stopped in this period.

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