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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 2026-07-23 12:23:29

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
86.106.81.0/24 255,515 2026-07-24 00:34:33
194.150.84.0/24 254,523 2026-07-24 00:34:34
89.47.111.0/24 248,311 2026-07-24 00:34:34
194.150.85.0/24 241,153 2026-07-24 00:34:34
194.150.86.0/24 212,857 2026-07-24 00:34:34
194.150.84.0/23 188,310 2026-07-24 00:34:34
89.39.111.0/24 186,935 2026-07-24 00:34:34
193.19.194.0/24 183,864 2026-07-24 00:34:34
193.19.195.0/24 182,038 2026-07-24 00:34:34
193.19.192.0/24 176,139 2026-07-24 00:34:34
188.241.3.0/24 159,747 2026-07-24 00:34:34
93.113.204.0/24 150,574 2026-07-24 00:34:34
89.40.67.0/24 99,636 2026-07-24 00:30:47
89.45.164.0/24 97,394 2026-07-24 00:30:47
89.47.120.0/24 97,153 2026-07-24 00:30:47
194.150.87.0/24 92,219 2026-07-24 00:30:47
89.47.122.0/24 91,937 2026-07-24 00:30:47
89.47.107.0/24 62,438 2026-07-24 00:29:00
89.47.108.0/24 61,856 2026-07-24 00:29:00
89.47.109.0/24 61,252 2026-07-24 00:29:00
89.47.110.0/24 60,653 2026-07-24 00:29:00
89.47.102.0/24 9,897 2026-07-24 00:04:23
89.47.106.0/24 9,892 2026-07-24 00:04:23
89.47.103.0/24 9,891 2026-07-24 00:04:23
89.47.96.0/24 9,891 2026-07-24 00:04:23
89.47.98.0/24 9,889 2026-07-24 00:04:23
89.47.104.0/24 9,887 2026-07-24 00:04:23
89.47.101.0/24 9,886 2026-07-24 00:04:23
89.47.105.0/24 9,884 2026-07-24 00:04:23
89.47.97.0/24 9,883 2026-07-24 00:04:23
89.40.83.0/24 1,755 2026-07-22 12:26:40

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: 2026-07-24 00:40:30 UTC
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