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AS214757Jakub Krsa

CzechiaRegistryRIPE NCCTypeEyeball

As of 26th September 2026, AS214757 (Jakub Krsa), an access network registered in Czechia with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 14 IPv6 prefixes. By IPv4 address space that makes it the 59,122nd-largest of the 79,516 networks we see originating IPv4, and the 486th-largest of 574 in Czechia. It is seen behind 46 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS57463 (NetIX Communications JSC), and in front of 22 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

1

IPv6 prefixes

14

IPv4 addresses

256

IPv6 /64s

5.8M

Upstream graph

The networks AS214757 is seen behind, one and two hops out, drawn from real AS paths.

AS214757Toward the internet core
Upstream graph for AS214757: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS214757Jakub KrsaThis networkAS3214xTom GmbHAS6939Hurricane Electri…AS49127Asimo Networks B.…AS50917Diederik Focko de…AS57463NetIX Communicati…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS8283Netwerkvereniging…AS137409GSL Networks Pty …AS174Cogent Communicat…AS20495We Dare B.V.AS32590Valve Corporation

Networks observed one and two hops upstream of AS214757 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

273

adjacent networks

Upstreams
4617%
Peers
20575%
Downstreams
228%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 46.

Upstreams of AS214757
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer53666
AS57463NetIX Communications JSCBGPeer32673
AS50917Diederik Focko de ZeeNLPeer318103
AS49127Asimo Networks B.V.NLPeer309109
AS3214xTom GmbHDEPeer961
AS601443W Infra B.V.NLPeer941
AS34927iFog GmbHCHPeer9064
AS60068Datacamp Limited (CDN77 / DataPacket)GBPeer6663
AS8888xTom Pty LtdAUPeer652
AS34854Maria Merkel trading as Blahaj StudioDEPeer6464

Prefixes

The largest blocks AS214757 originates, widest first.

Largest prefixes originated by AS214757
PrefixAddressesVisibility
169.128.49.0/2425681/81
2a05:dfc3:f800::/441M × /6463/64
2a14:6f44:1000::/441M × /6463/64
2a14:6f44:1010::/441M × /6464/64
2a14:6f44:1020::/441M × /6463/64
2a14:6f44:1030::/441M × /6463/64
2a0a:6044:a1e0::/4865.5k × /6463/64
2a14:6f44:1101::/4865.5k × /6463/64
2a14:6f44:1102::/4865.5k × /6463/64
2a14:6f44:1103::/4865.5k × /6464/64

Routing health

How AS214757'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 — 1 prefixes

IPv6 — 14 prefixes

  • /441M × /6435.7%5
  • /4865.5k × /6464.3%9

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced2a14:6f44:1030::/4422nd Sept 2026
  • Withdrawn2a05:dfc3:f840::/4421st Sept 2026
  • Withdrawn2a0a:6044:a101::/4821st Sept 2026
  • Withdrawn2a0a:6044:a106::/4821st Sept 2026
  • Withdrawn2a14:6f44:1040::/4421st Sept 2026

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