subnet.im

AS201021Ahmet Onur Guney trading as Onur Bilisim Ve Yazilim Hizmetleri

TürkiyeRegistryRIPE NCC

As of 26th September 2026, AS201021 (Ahmet Onur Guney trading as Onur…), a network registered in Türkiye with RIPE NCC, originates 67 IPv4 prefixes covering 17.2k addresses. By IPv4 address space that makes it the 7,764th-largest of the 79,516 networks we see originating IPv4, and the 36th-largest of 857 in Türkiye. It is seen behind 2 upstream networks, most often AS48678 (Pentech Bilisim Teknolojileri Sanayi Ve…) and AS9121 (Turk Telekom). 96% of its announcements have a valid RPKI ROA; 3 are RPKI-invalid. 96% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

67

IPv6 prefixes

0

IPv4 addresses

17.2k

IPv6 /64s

0

Upstream graph

The networks AS201021 is seen behind, one and two hops out, drawn from real AS paths.

AS201021Toward the internet core
Upstream graph for AS201021: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS201021Ahmet Onur Guney …This networkAS9121Turk TelekomAS48678Pentech Bilisim T…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS15830Equinix, Inc.

Networks observed one and two hops upstream of AS201021 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 AS201021
NetworkCountryRelationshipPathsVantage pts
AS48678Pentech Bilisim Teknolojileri Sanayi Ve Ticaret Limited SirketiTRPeer5,11181
AS9121Turk TelekomTRPeer8080

Prefixes

All 67

The largest blocks AS201021 originates, widest first.

Largest prefixes originated by AS201021
PrefixAddressesVisibility
13.143.211.0/2425681/81
13.143.218.0/2425681/81
13.143.226.0/2425681/81
13.143.238.0/2425681/81
13.143.250.0/2425681/81
31.77.58.0/2425681/81
46.38.141.0/2425681/81
77.81.88.0/2425681/81
77.81.100.0/2425681/81
78.17.182.0/2425681/81

Routing health

How AS201021'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

  • Valid95.5%64
  • Invalid4.5%3
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more95.5%64
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%4.5%3

Prefix sizes

IPv4 — 67 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

8 announced and 17 withdrawn in all; the most recent are shown.

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