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AS51519Karabro AB

SwedenRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS51519 (Karabro AB), a transit carrier registered in Sweden with RIPE NCC, originates 2 IPv4 prefixes covering 1.3k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 33,367th-largest of the 79,516 networks we see originating IPv4, and the 283rd-largest of 642 in Sweden. It is seen behind 7 upstream networks, most often AS39351 (31173 Services AB) and AS6939 (Hurricane Electric LLC), and in front of 8 downstream networks. 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

2

IPv6 prefixes

1

IPv4 addresses

1.3k

IPv6 /64s

34.4B

Upstream graph

The networks AS51519 is seen behind, one and two hops out, drawn from real AS paths.

AS51519Toward the internet core
Upstream graph for AS51519: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51519Karabro ABThis networkAS6939Hurricane Electri…AS24940Hetzner Online Gm…AS35280F5 Networks SARLAS3935131173 Services ABAS49544i3D.net B.VAS18106Viewqwest Pte LtdAS20130Depaul UniversityAS32590Valve CorporationAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS174Cogent Communicat…

Networks observed one and two hops upstream of AS51519 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

185

adjacent networks

Upstreams
74%
Peers
17092%
Downstreams
84%

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

Upstreams of AS51519
NetworkCountryRelationshipPathsVantage pts
AS3935131173 Services ABSEPeer649128
AS6939Hurricane Electric LLCUSPeer9616
AS35280F5 Networks SARLFRPeer132
AS49544i3D.net B.VNLPeer132
AS24940Hetzner Online GmbHDEPeer132
AS20473The Constant Company, LLCUSPeer121
AS12552GlobalConnect (IP-Only)SEPeer31

Prefixes

The largest blocks AS51519 originates, widest first.

Largest prefixes originated by AS51519
PrefixAddressesVisibility
45.132.232.0/221k81/81
45.132.235.0/2425681/81
2a0e:73c0::/2934.4B × /6463/64

Routing health

How AS51519'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%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /2934.4B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS51519 started or stopped in this period.

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