subnet.im

AS6663Türk Telekom International

RomaniaRegistryRIPE NCCTypeCarrier

As of 11th November 2026, AS6663 (Türk Telekom International), a transit carrier registered in Romania with RIPE NCC, originates 50 IPv4 prefixes covering 40.4k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 4,958th-largest of the 80,747 networks we see originating IPv4, and the 13th-largest of 913 in Romania. It is seen behind 48 upstream networks, most often AS2914 (NTT America, Inc.) and AS5405 (Inter.link GmbH), and in front of 137 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 96% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

50

IPv6 prefixes

2

IPv4 addresses

40.4k

IPv6 /64s

6.4B

Upstream graph

The networks AS6663 is seen behind, one and two hops out, drawn from real AS paths.

AS6663Toward the internet core
Upstream graph for AS6663: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6663Türk Telekom Inte…This networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS5405Inter.link GmbHAS7713PT Telkom Indones…AS132337AxclusiveAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3491PCCW Global (HK) …AS13237euNetworks GmbHAS35280F5 Networks SARLAS6939Hurricane Electri…AS9002RETN Limited

Networks observed one and two hops upstream of AS6663 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

2,245

adjacent networks

Upstreams
482%
Peers
2,06092%
Downstreams
1376%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 48.

Upstreams of AS6663
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer13,58663
AS5405Inter.link GmbHDEPeer9,604106
AS132337AxclusiveSGAdjacent4,7892
AS7713PT Telkom Indonesia TbkIDPeer4,5473
AS3356Lumen (Level 3)USPeer4,25850
AS1299Arelion (fka. Telia Carrier)SEPeer4,05540
AS7768Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERITRPeer3,2592
AS8888xTom Pty LtdAUPeer3,2422
AS213151Christian ElsenDEPeer2,8032
AS18106Viewqwest Pte LtdSGPeer2,4614

Prefixes

All 52

The largest blocks AS6663 originates, widest first.

Largest prefixes originated by AS6663
PrefixAddressesVisibility
89.238.192.0/1816.4k76/76
81.24.16.0/204.1k76/76
31.210.8.0/212k76/76
81.181.88.0/212k76/76
46.29.0.0/221k76/76
46.29.4.0/221k76/76
85.204.32.0/221k76/76
85.204.100.0/221k76/76
185.74.20.0/221k76/76
86.106.122.0/2351276/76

Routing health

How AS6663'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%52
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more96.2%50
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%3.8%2

Prefix sizes

IPv4 — 50 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /332.1B × /6450.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS6663 started or stopped in this period.

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