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AS397868Black Duck Software, Inc.

United StatesRegistryARIN

As of 22nd October 2026, AS397868 (Black Duck Software, Inc.), a network registered in the United States with ARIN, originates 1 IPv4 prefix covering 256 addresses. By IPv4 address space that makes it the 59,188th-largest of the 79,663 networks we see originating IPv4, and the 12,886th-largest of 18,476 in the United States. It is seen behind 2 upstream networks, most often AS174 (Cogent Communications, LLC) and AS3356 (Lumen (Level 3)). Every one of its announcements has 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

1

IPv6 prefixes

0

IPv4 addresses

256

IPv6 /64s

0

Upstream graph

The networks AS397868 is seen behind, one and two hops out, drawn from real AS paths.

AS397868Toward the internet core
Upstream graph for AS397868: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS397868Black Duck Softwa…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS397868 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS397868
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer6565
AS3356Lumen (Level 3)USPeer1111

Prefixes

The largest blocks AS397868 originates, widest first.

Largest prefixes originated by AS397868
PrefixAddressesVisibility
162.244.4.0/2425676/77

Routing health

How AS397868'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

  • Valid100.0%1
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

  • Withdrawn162.223.124.0/2415th Oct 2026

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