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Autonomous System

AS39543

Tennet Telecom SRL

Announced IPs
7,424
CIDR prefixes
16
ASN
AS39543

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

58/100
Caution
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 1 MOAS prefix — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS39543 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

PrefixOrigin ASNsLast detected (UTC)
89.40.83.0/24 AS16276, AS39543 2026-09-11 16:10:55

Network profile

Source: PeeringDB →
Network type NSP
Traffic level 5-10Gbps
Geographic scope Europe
Traffic ratio Balanced
Peering policy Open
IRR record AS-TENNET

Present at 2 internet exchanges: Balcan-IX, InterLAN-IX: InterLAN Peering Network

Top CIDR ranges

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS39543 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
86.106.81.0/24 499,817 2026-09-12 13:09:55
194.150.84.0/24 498,178 2026-09-12 13:09:55
89.47.111.0/24 491,424 2026-09-12 13:09:55
194.150.85.0/24 473,672 2026-09-12 13:09:56
194.150.86.0/24 429,926 2026-09-12 13:09:56
194.150.84.0/23 392,189 2026-09-12 13:09:56
89.39.111.0/24 389,905 2026-09-12 13:09:56
193.19.194.0/24 362,053 2026-09-12 13:07:52
193.19.195.0/24 358,819 2026-09-12 13:07:52
193.19.192.0/24 349,074 2026-09-12 13:07:52
188.241.3.0/24 329,877 2026-09-12 13:08:51
93.113.204.0/24 307,895 2026-09-12 13:08:51
89.47.120.0/24 185,659 2026-09-12 13:07:52
89.40.67.0/24 185,620 2026-09-12 13:06:42
89.45.164.0/24 181,162 2026-09-12 13:06:42
89.47.122.0/24 175,817 2026-09-12 13:07:52
194.150.87.0/24 170,483 2026-09-12 13:06:42
89.47.107.0/24 121,998 2026-09-12 13:07:52
89.47.108.0/24 121,394 2026-09-12 13:07:52
89.47.109.0/24 120,632 2026-09-12 13:07:52
89.47.110.0/24 119,938 2026-09-12 13:07:52
89.47.103.0/24 42,386 2026-09-12 13:07:52
89.47.104.0/24 42,322 2026-09-12 13:07:52
89.47.105.0/24 42,277 2026-09-12 13:07:52
89.47.106.0/24 42,260 2026-09-12 13:07:52
89.47.101.0/24 42,156 2026-09-12 13:07:52
89.47.102.0/24 42,129 2026-09-12 13:07:52
89.47.96.0/24 42,078 2026-09-12 13:07:52
89.47.97.0/24 42,020 2026-09-12 13:07:52
89.47.98.0/24 41,961 2026-09-12 13:07:52
89.40.83.0/24 1,767 2026-09-10 16:11:53

Frequently Asked Questions

What is AS39543?

AS39543 is an Autonomous System Number assigned to Tennet Telecom SRL. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS39543 announce?

AS39543 announces 7.4K IPv4 addresses distributed across 16 routed CIDR prefixes. The network is registered in Romania.

Who operates AS39543?

AS39543 is operated by Tennet Telecom SRL. The organization is based in Romania. You can view all IP ranges and related ASNs on the organization page.

What country is AS39543 registered in?

AS39543 is registered in Romania. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-12 13:09:07 UTC
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