subnet.im

AS21641VIRTUASYS America, Inc.

United StatesRegistryARINTypeCarrier

As of 27th September 2026, AS21641 (VIRTUASYS America, Inc.), a transit carrier registered in the United States with ARIN, originates 1 IPv6 prefix. It is seen behind 1 upstream network, most often AS197959 (VIRTUA SYSTEMS SAS). None of its announcements have a valid RPKI ROA. 0% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

0

IPv6 prefixes

1

IPv4 addresses

0

IPv6 /64s

4.3B

Upstream graph

The networks AS21641 is seen behind, one and two hops out, drawn from real AS paths.

AS21641Toward the internet core
Upstream graph for AS21641: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21641VIRTUASYS America…This networkAS197959VIRTUA SYSTEMS SASAS6939Hurricane Electri…AS35661VIRTUA SYSTEMS SAS

Networks observed one and two hops upstream of AS21641 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

15

adjacent networks

Upstreams
17%
Peers
1493%
Downstreams
00%

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

Upstreams of AS21641
NetworkCountryRelationshipPathsVantage pts
AS197959VIRTUA SYSTEMS SASFRPeer77

Prefixes

The largest blocks AS21641 originates, widest first.

Largest prefixes originated by AS21641
PrefixAddressesVisibility
2607:8bc0::/324.3B × /647/64

Routing health

How AS21641'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%1

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%1

Prefix sizes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS21641 started or stopped in this period.

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