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AS398816Flume

United StatesRegistryARIN

As of 24th October 2026, AS398816 (Flume), a network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 8.4k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 11,606th-largest of the 79,671 networks we see originating IPv4, and the 3,451st-largest of 18,487 in the United States. It is seen behind 3 upstream networks, most often AS174 (Cogent Communications, LLC) and AS46887 (Zayo (fka. Crown Castle)). 39% 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

17

IPv6 prefixes

6

IPv4 addresses

8.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS398816 is seen behind, one and two hops out, drawn from real AS paths.

AS398816Toward the internet core
Upstream graph for AS398816: 7 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS398816FlumeThis networkAS174Cogent Communicat…AS29838Atlantic Metro Co…AS46887Zayo (fka. Crown …AS151326DCConnect Communi…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS398816 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

7

adjacent networks

Upstreams
343%
Peers
457%
Downstreams
00%

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

Upstreams of AS398816
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer61790
AS46887Zayo (fka. Crown Castle)USPeer594138
AS29838Atlantic Metro Communications II, Inc.USPeer44590

Prefixes

The largest blocks AS398816 originates, widest first.

Largest prefixes originated by AS398816
PrefixAddressesVisibility
38.20.120.0/212k75/76
38.20.112.0/221k75/76
38.46.252.0/221k75/76
206.109.120.0/221k76/76
38.20.116.0/2425675/76
38.20.117.0/2425675/76
38.20.118.0/2425676/76
38.20.119.0/2425676/76
38.89.152.0/2425676/76
38.89.153.0/2425676/76

Routing health

How AS398816'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

  • Valid39.1%9
  • Invalid0.0%0
  • No ROA60.9%14

Propagation

  • Globally propagated90% of full-feed peers or more100.0%23
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 6 prefixes

  • /324.3B × /6416.7%1
  • /4016.8M × /6450.0%3
  • /4865.5k × /6433.3%2

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS398816 started or stopped in this period.

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