subnet.im

AS397933Clark Associates, Inc.

United StatesRegistryARIN

As of 23rd October 2026, AS397933 (Clark Associates, Inc.), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 768 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 44,959th-largest of the 79,652 networks we see originating IPv4, and the 9,395th-largest of 18,475 in the United States. It is seen behind 1 upstream network, most often AS23005 (SWITCH, LTD). 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

3

IPv6 prefixes

1

IPv4 addresses

768

IPv6 /64s

65.5k

Upstream graph

The networks AS397933 is seen behind, one and two hops out, drawn from real AS paths.

AS397933Toward the internet core
Upstream graph for AS397933: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS397933Clark Associates,…This networkAS23005SWITCH, LTDAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS397933 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS397933
NetworkCountryRelationshipPathsVantage pts
AS23005SWITCH, LTDUSPeer295141

Prefixes

The largest blocks AS397933 originates, widest first.

Largest prefixes originated by AS397933
PrefixAddressesVisibility
67.159.200.0/2425677/77
158.51.243.0/2425677/77
198.246.233.0/2425677/77
2606:a600:4::/4865.5k × /6464/64

Routing health

How AS397933'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%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS397933 started or stopped in this period.

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