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AS211851SECKIN CAN CELENK trading as Web9 Bilisim ve Yazilim Hizmetleri

TürkiyeRegistryRIPE NCCTypeEyeball

As of 11th November 2026, AS211851 (SECKIN CAN CELENK trading as Web9…), an access network registered in Türkiye with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 49,318th-largest of the 80,743 networks we see originating IPv4, and the 424th-largest of 870 in Türkiye. It is seen behind 2 upstream networks, most often AS218802 (Northshield LLC) and AS219122 (EXPONET VERI MERKEZI HIZMETLERI SAN. VE…). 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

2

IPv4 addresses

512

IPv6 /64s

131k

Upstream graph

The networks AS211851 is seen behind, one and two hops out, drawn from real AS paths.

AS211851Toward the internet core
Upstream graph for AS211851: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS211851SECKIN CAN CELENK…This networkAS218802Northshield LLCAS219122EXPONET VERI MERK…AS203446SMARTNET Germany …AS12735TurkNet Iletisim …AS213382PEERYX NETWORK SAS

Networks observed one and two hops upstream of AS211851 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS211851
NetworkCountryRelationshipPathsVantage pts
AS218802Northshield LLCUSPeer15276
AS219122EXPONET VERI MERKEZI HIZMETLERI SAN. VE TIC. LTD. STI.TRPeer12462

Prefixes

The largest blocks AS211851 originates, widest first.

Largest prefixes originated by AS211851
PrefixAddressesVisibility
37.221.76.0/2425676/76
87.76.159.0/2425676/76
2a06:9801:74e::/4865.5k × /6462/63
2a0f:85c1:bb6::/4865.5k × /6462/63

Routing health

How AS211851'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%4
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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