subnet.im

AS6663Türk Telekom International

RomaniaRegistryRIPE NCCTypeCarrier

As of 26th September 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 4,900th-largest of the 79,480 networks we see originating IPv4, and the 13th-largest of 903 in Romania. It is seen behind 49 upstream networks, most often AS2914 (NTT America, Inc.) and AS5405 (Inter.link GmbH), and in front of 118 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 networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS5405Inter.link GmbHAS132337AxclusiveAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS3491PCCW Global (HK) …AS13237euNetworks GmbHAS6939Hurricane Electri…

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

2,451

adjacent networks

Upstreams
492%
Peers
2,28493%
Downstreams
1185%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 49.

Upstreams of AS6663
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer14,47159
AS5405Inter.link GmbHDEPeer10,159107
AS132337AxclusiveSGPeer4,0282
AS3356Lumen (Level 3)USPeer4,00350
AS1299Arelion (fka. Telia Carrier)SEPeer3,98839
AS38880Micron21 Datacentre Pty LtdAUPeer2,7972
AS7713PT Telkom Indonesia TbkIDPeer2,1053
AS18106Viewqwest Pte LtdSGPeer1,9244
AS7768Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERITRPeer1,8742
AS8888xTom Pty LtdAUPeer1,8712

Prefixes

All 52

The largest blocks AS6663 originates, widest first.

Largest prefixes originated by AS6663
PrefixAddressesVisibility
89.238.192.0/1816.4k81/81
81.24.16.0/204.1k81/81
31.210.8.0/212k81/81
81.181.88.0/212k81/81
46.29.0.0/221k81/81
46.29.4.0/221k81/81
85.204.32.0/221k81/81
85.204.100.0/221k81/81
185.74.20.0/221k81/81
86.106.122.0/2351281/81

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 27th Aug 2026.

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