subnet.im

AS39543Tennet Telecom SRL

RomaniaRegistryRIPE NCC

As of 27th September 2026, AS39543 (Tennet Telecom SRL), a network registered in Romania with RIPE NCC, originates 30 IPv4 prefixes covering 7.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 12,567th-largest of the 79,523 networks we see originating IPv4, and the 42nd-largest of 903 in Romania. It is seen behind 10 upstream networks, most often AS6204 (TMRC GROUP SRL) and AS41494 (Asociația InterLAN), and in front of 5 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

30

IPv6 prefixes

1

IPv4 addresses

7.9k

IPv6 /64s

65.5k

Upstream graph

The networks AS39543 is seen behind, one and two hops out, drawn from real AS paths.

AS39543Toward the internet core
Upstream graph for AS39543: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS39543Tennet Telecom SRLThis networkAS6204TMRC GROUP SRLAS6939Hurricane Electri…AS8708DIGI ROMANIA S.A.AS41494Asociația InterLANAS49544i3D.net B.VAS1299Arelion (fka. Tel…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS2914NTT America, Inc.AS6910DIGI ROMANIA S.A.AS42089Miss Me Consult C…AS3223Voxility LLP

Networks observed one and two hops upstream of AS39543 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

55

adjacent networks

Upstreams
1018%
Peers
4073%
Downstreams
59%

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

Upstreams of AS39543
NetworkCountryRelationshipPathsVantage pts
AS6204TMRC GROUP SRLROPeer1,94660
AS41494Asociația InterLANROPeer726127
AS8708DIGI ROMANIA S.A.ROPeer15916
AS6939Hurricane Electric LLCUSPeer935
AS49544i3D.net B.VNLPeer792
AS24482SG.GSSGPeer692
AS32590Valve CorporationUSPeer411
AS14537Continent 8 LLCUSPeer411
AS132337AxclusiveSGPeer411
AS24745Orange Romania S.A.ROPeer371

Prefixes

All 31

The largest blocks AS39543 originates, widest first.

Largest prefixes originated by AS39543
PrefixAddressesVisibility
194.150.84.0/2351280/81
86.106.81.0/2425680/81
89.39.111.0/2425680/81
89.40.67.0/2425680/81
89.45.164.0/2425680/81
89.47.96.0/2425680/81
89.47.97.0/2425680/81
89.47.98.0/2425680/81
89.47.101.0/2425680/81
89.47.102.0/2425680/81

Routing health

How AS39543'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%31
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%31
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 30 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS39543 started or stopped in this period.

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