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AS42156GNX B.V.

NetherlandsRegistryRIPE NCC

As of 12th November 2026, AS42156 (GNX B.V.), a network registered in the Netherlands with RIPE NCC, originates 11 IPv4 prefixes covering 4.1k addresses and 51 IPv6 prefixes. By IPv4 address space that makes it the 17,386th-largest of the 80,772 networks we see originating IPv4, and the 256th-largest of 1,042 in the Netherlands. It is seen behind 41 upstream networks, most often AS8529 (Zain Omantel International FZ-LLC) and AS200612 (Gulf Bridge International Inc.), and in front of 21 downstream networks. 26% of its announcements have a valid RPKI ROA; 46 are RPKI-invalid. 24% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

11

IPv6 prefixes

51

IPv4 addresses

4.1k

IPv6 /64s

85.9B

Upstream graph

The networks AS42156 is seen behind, one and two hops out, drawn from real AS paths.

AS42156Toward the internet core
Upstream graph for AS42156: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS42156GNX B.V.This networkAS6461Zayo BandwidthAS8529Zain Omantel Inte…AS9002RETN LimitedAS20562Open Peering (Bro…AS200612Gulf Bridge Inter…AS6453TATA Communicatio…AS137409GSL Networks Pty …AS32590Valve CorporationAS3356Lumen (Level 3)AS6667Elisa OyjAS174Cogent Communicat…AS51375STC BAHRAIN B.S.C…

Networks observed one and two hops upstream of AS42156 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

229

adjacent networks

Upstreams
4118%
Peers
16773%
Downstreams
219%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 41.

Upstreams of AS42156
NetworkCountryRelationshipPathsVantage pts
AS8529Zain Omantel International FZ-LLCAEPeer79293
AS200612Gulf Bridge International Inc.VGPeer768137
AS9002RETN LimitedGBPeer36078
AS20562Open Peering (Broadband Hosting B.V.)NLPeer29949
AS6461Zayo BandwidthUSPeer16820
AS6939Hurricane Electric LLCUSPeer16670
AS60068Datacamp Limited (CDN77 / DataPacket)GBPeer16545
AS15802Emirates Integrated Telecommunications Company PJSCAEPeer9579
AS6762Telecom Italia Sparkle (Seabone)ITPeer9026
AS4637Telstra International LimitedHKPeer6720

Prefixes

All 62

The largest blocks AS42156 originates, widest first.

Largest prefixes originated by AS42156
PrefixAddressesVisibility
45.83.172.0/221k78/78
45.83.172.0/2351278/78
45.143.62.0/2351278/78
45.83.174.0/2425678/78
45.83.175.0/2425678/78
45.143.60.0/2425678/78
45.143.61.0/2425678/78
69.48.159.0/2425678/78
185.161.188.0/2425677/78
185.251.180.0/2425678/78

Routing health

How AS42156'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

  • Valid25.8%16
  • Invalid74.2%46
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more24.2%15
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%75.8%47

Prefix sizes

IPv4 — 11 prefixes

IPv6 — 51 prefixes

  • /2934.4B × /643.9%2
  • /324.3B × /647.8%4
  • /49 and longerAggregated88.2%45

Recent changes

Announcements that started or stopped since 13th Oct 2026.

No announcement by AS42156 started or stopped in this period.

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