subnet.im

AS5578SWAN, a.s.

SlovakiaRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS5578 (SWAN, a.s.), an access network registered in Slovakia with RIPE NCC, originates 53 IPv4 prefixes covering 330k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 921st-largest of the 79,525 networks we see originating IPv4, and the 3rd-largest of 191 in Slovakia. It is seen behind 35 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS174 (Cogent Communications, LLC), and in front of 54 downstream networks. 91% 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

53

IPv6 prefixes

5

IPv4 addresses

330k

IPv6 /64s

51.5B

Upstream graph

The networks AS5578 is seen behind, one and two hops out, drawn from real AS paths.

AS5578Toward the internet core
Upstream graph for AS5578: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5578SWAN, a.s.This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS7713PT Telkom Indones…AS18106Viewqwest Pte LtdAS38880Micron21 Datacent…AS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS6453TATA Communicatio…AS35280F5 Networks SARLAS2914NTT America, Inc.AS9002RETN Limited

Networks observed one and two hops upstream of AS5578 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

304

adjacent networks

Upstreams
3512%
Peers
21571%
Downstreams
5418%

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

Upstreams of AS5578
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer5,55465
AS174Cogent Communications, LLCUSPeer2,19926
AS38880Micron21 Datacentre Pty LtdAUPeer8742
AS7713PT Telkom Indonesia TbkIDPeer7073
AS18106Viewqwest Pte LtdSGPeer5082
AS8888xTom Pty LtdAUPeer4692
AS8298IPng Networks GmbHCHPeer4692
AS7768Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERITRPeer4692
AS213151Christian ElsenDEPeer4682
AS58511Swoop (Anycast Global Backbone)AUPeer4642

Prefixes

All 58

The largest blocks AS5578 originates, widest first.

Largest prefixes originated by AS5578
PrefixAddressesVisibility
85.248.0.0/1665.5k80/81
195.168.0.0/1665.5k80/81
62.168.64.0/1816.4k80/81
62.197.192.0/1816.4k80/81
83.168.128.0/1816.4k80/81
84.245.64.0/1816.4k80/81
213.215.64.0/1816.4k80/81
62.65.160.0/198.2k80/81
62.152.224.0/198.2k80/81
195.12.128.0/198.2k80/81

Routing health

How AS5578'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

  • Valid91.4%53
  • Invalid0.0%0
  • No ROA8.6%5

Propagation

  • Globally propagated90% of full-feed peers or more100.0%58
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 53 prefixes

IPv6 — 5 prefixes

  • /2934.4B × /6420.0%1
  • /324.3B × /6480.0%4

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS5578 started or stopped in this period.

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