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AS51167Contabo GmbH

GermanyRegistryRIPE NCCTypeContent

As of 27th September 2026, AS51167 (Contabo GmbH), a content network registered in Germany with RIPE NCC, originates 568 IPv4 prefixes covering 543k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 676th-largest of the 79,525 networks we see originating IPv4, and the 15th-largest of 2,288 in Germany. It is seen behind 4 upstream networks, most often AS3356 (Lumen (Level 3)) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 1 downstream network. 97% 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

568

IPv6 prefixes

5

IPv4 addresses

543k

IPv6 /64s

21.5B

Upstream graph

The networks AS51167 is seen behind, one and two hops out, drawn from real AS paths.

AS51167Toward the internet core
Upstream graph for AS51167: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51167Contabo GmbHThis networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS13768Aptum TechnologiesAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS3257GTT Communication…

Networks observed one and two hops upstream of AS51167 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

11

adjacent networks

Upstreams
436%
Peers
655%
Downstreams
19%

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

Upstreams of AS51167
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer24,117125
AS1299Arelion (fka. Telia Carrier)SEPeer20,650138
AS174Cogent Communications, LLCUSPeer83034
AS13768Aptum TechnologiesCAPeer73564

Prefixes

All 573

The largest blocks AS51167 originates, widest first.

Largest prefixes originated by AS51167
PrefixAddressesVisibility
169.58.0.0/1732.8k81/81
169.58.128.0/1732.8k81/81
13.140.128.0/1816.4k81/81
194.163.128.0/1816.4k81/81
38.242.192.0/198.2k81/81
38.242.224.0/198.2k81/81
75.119.128.0/198.2k81/81
84.247.160.0/198.2k81/81
161.97.128.0/198.2k81/81
173.212.192.0/198.2k81/81

Routing health

How AS51167'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

  • Valid97.4%558
  • Invalid0.0%0
  • No ROA2.6%15

Propagation

  • Globally propagated90% of full-feed peers or more100.0%573
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 568 prefixes

IPv6 — 5 prefixes

  • /324.3B × /64100.0%5

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS51167 started or stopped in this period.

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