subnet.im

AS40021Contabo (Nubes, LLC)

United StatesRegistryARINTypeContent

As of 24th October 2026, AS40021 (Contabo (Nubes, LLC)), a content network registered in the United States with ARIN, originates 94 IPv4 prefixes covering 152k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 1,632nd-largest of the 79,642 networks we see originating IPv4, and the 470th-largest of 18,487 in the United States. It is seen behind 3 upstream networks, most often AS174 (Cogent Communications, LLC) and AS3356 (Lumen (Level 3)). 83% 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

94

IPv6 prefixes

5

IPv4 addresses

152k

IPv6 /64s

21.5B

Upstream graph

The networks AS40021 is seen behind, one and two hops out, drawn from real AS paths.

AS40021Toward the internet core
Upstream graph for AS40021: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS40021Contabo (Nubes, L…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS46887Zayo (fka. Crown …AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6461Zayo BandwidthAS47065USC / UFMG PEERIN…

Networks observed one and two hops upstream of AS40021 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

8

adjacent networks

Upstreams
338%
Peers
563%
Downstreams
00%

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

Upstreams of AS40021
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer3,356110
AS3356Lumen (Level 3)USPeer2,82097
AS46887Zayo (fka. Crown Castle)USPeer1,17650

Prefixes

All 99

The largest blocks AS40021 originates, widest first.

Largest prefixes originated by AS40021
PrefixAddressesVisibility
13.140.32.0/204.1k75/76
13.140.224.0/204.1k75/76
144.126.128.0/204.1k75/76
147.93.128.0/204.1k74/76
147.93.176.0/204.1k75/76
157.173.192.0/204.1k75/76
207.244.224.0/204.1k75/76
207.244.240.0/204.1k75/76
209.126.0.0/204.1k75/76
209.145.48.0/204.1k75/76

Routing health

How AS40021'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

  • Valid82.8%82
  • Invalid0.0%0
  • No ROA17.2%17

Propagation

  • Globally propagated90% of full-feed peers or more100.0%99
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 94 prefixes

IPv6 — 5 prefixes

  • /324.3B × /64100.0%5

Recent changes

Announcements that started or stopped since 24th Sept 2026.

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