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AS208453Johan Karlsson (SweHosting)

SwedenRegistryRIPE NCCTypeContent

As of 27th September 2026, AS208453 (Johan Karlsson (SweHosting)), a content network registered in Sweden with RIPE NCC, originates 5 IPv4 prefixes covering 1.3k addresses and 10 IPv6 prefixes. By IPv4 address space that makes it the 33,373rd-largest of the 79,523 networks we see originating IPv4, and the 283rd-largest of 643 in Sweden. It is seen behind 10 upstream networks, most often AS35133 (Eranium B.V.) and AS3399 (Obenet AB), and in front of 15 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

5

IPv6 prefixes

10

IPv4 addresses

1.3k

IPv6 /64s

319M

Upstream graph

The networks AS208453 is seen behind, one and two hops out, drawn from real AS paths.

AS208453Toward the internet core
Upstream graph for AS208453: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS208453Johan Karlsson (S…This networkAS3399Obenet ABAS6939Hurricane Electri…AS24940Hetzner Online Gm…AS35133Eranium B.V.AS60068Datacamp Limited …AS3257GTT Communication…AS6453TATA Communicatio…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS6830Liberty Global Eu…AS174Cogent Communicat…AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS208453 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

84

adjacent networks

Upstreams
1012%
Peers
5970%
Downstreams
1518%

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

Upstreams of AS208453
NetworkCountryRelationshipPathsVantage pts
AS35133Eranium B.V.NLPeer1,08298
AS3399Obenet ABSEPeer929129
AS60068Datacamp Limited (CDN77 / DataPacket)GBPeer51672
AS6939Hurricane Electric LLCUSPeer16821
AS24940Hetzner Online GmbHDEPeer492
AS39122Blacknight Internet Solutions LimitedIEPeer462
AS49544i3D.net B.VNLPeer372
AS20473The Constant Company, LLCUSPeer351
AS24482SG.GSSGPeer112
AS8298IPng Networks GmbHCHPeer11

Prefixes

The largest blocks AS208453 originates, widest first.

Largest prefixes originated by AS208453
PrefixAddressesVisibility
193.142.4.0/2425681/81
193.181.23.0/2425681/81
193.181.29.0/2425681/81
193.181.243.0/2425681/81
193.181.244.0/2425681/81
2a07:54c1:f000::/36268M × /6463/64
2a14:1ec7:f000::/4016.8M × /6463/64
2a14:1ec7:f500::/4016.8M × /6463/64
2a14:7583:5900::/4016.8M × /6463/64
2a07:54c4:1761::/4865.5k × /6463/64

Routing health

How AS208453'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%15
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%15
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 10 prefixes

  • /36268M × /6410.0%1
  • /4016.8M × /6430.0%3
  • /4865.5k × /6460.0%6

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS208453 started or stopped in this period.

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