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Autonomous System

AS201637

Tomasz Naruszewicz

Announced IPs
2,304
CIDR prefixes
3
ASN
AS201637

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.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Network profile

Source: PeeringDB →
Network type Cable/DSL/ISP
Traffic level 1-5Gbps
Geographic scope Not Disclosed
Traffic ratio Mostly Inbound
Peering policy Open

Top CIDR ranges

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS201637 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
91.196.108.0/22 18,984 2026-07-18 10:51:58
185.140.100.0/22 18,775 2026-07-18 10:51:58
194.116.166.0/24 18,721 2026-07-18 10:51:58
194.116.166.138/32 31 2026-07-09 13:28:44
185.140.100.133/32 22 2026-07-09 10:55:25
194.116.166.8/32 21 2026-07-16 17:28:18
185.140.102.141/32 21 2026-07-09 22:19:43
194.116.166.191/32 16 2026-06-29 15:03:31
194.116.166.152/32 16 2026-07-02 10:12:37
194.116.166.0/32 10 2026-07-17 21:58:41
194.116.166.193/32 10 2026-07-07 13:26:38
194.116.166.13/32 10 2026-07-10 15:59:41
194.116.166.32/32 9 2026-07-12 22:23:39
194.116.166.24/32 8 2026-07-12 22:24:52
91.196.109.93/32 6 2026-07-06 09:29:06
194.116.166.176/32 5 2026-06-21 12:11:57
194.116.166.36/32 5 2026-07-12 07:13:52
194.116.166.23/32 5 2026-06-29 15:17:19
194.116.166.185/32 5 2026-06-15 18:29:16
194.116.166.148/32 5 2026-07-17 21:58:41

Frequently Asked Questions

What is AS201637?

AS201637 is an Autonomous System Number assigned to Tomasz Naruszewicz. 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 AS201637 announce?

AS201637 announces 2.3K IPv4 addresses distributed across 3 routed CIDR prefixes. The network is registered in Poland.

Who operates AS201637?

AS201637 is operated by Tomasz Naruszewicz. The organization is based in Poland. You can view all IP ranges and related ASNs on the organization page.

What country is AS201637 registered in?

AS201637 is registered in Poland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-07-18 11:25:31 UTC
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