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ASN REPORT — AS20539 · Technical Centre Radio Systems Ltd.

First sighted: Aug. 4, 2025, 3 a.m. · Last sighted: Feb. 22, 2026, 2 a.m.

Risk
1 (low)
Total hits
96
Total errors
19
Observed IPs
66
Top country
Ukraine
Top city
Sumy
Top region
Sumy

Risk

Model: v1 Computed: 2026-02-27 17:09:49
Risk score
1
Low
Risk gradient
Key drivers are enriched against the published annotator catalog when available; otherwise sensible defaults are used.
Key drivers
Credential brute forcing
Repeated authentication attempts consistent with password guessing or credential stuffing.
cred
Hits 5
Points 15.40

Traffic

Rollup

Daily activity (hits per day) and basic HTTP rollup counters for this ASN.

Loading activity…
Daily activity (hits per day). Total in window: —.
Traffic rollup
HTTP status classes, URL diversity, and totals.
2xx
77
3xx
0
4xx
19
5xx
0
Unique URLs
0
Total hits
96
First seen
Aug. 4, 2025, 3 a.m.
Last seen
Feb. 22, 2026, 2 a.m.

Annotators (All-time)

Heatmap of annotator × severity. Darker cells mean more volume in that band. Tip: switch to Weighted points to see what drives impact (not just noise).

Severity →
Low High
Credential brute forcing cred
Repeated authentication attempts consistent with password guessing or credential stuffing.
hits 5 pts 15.40
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 2 2 11.00 Feb. 17, 2026, 9:14 p.m. Feb. 20, 2026, 12:25 p.m. —
8 1 1 4.40 Feb. 17, 2026, 9:14 p.m. Feb. 17, 2026, 9:14 p.m. —
0 2 2 0.00 Feb. 17, 2026, 9:14 p.m. Feb. 20, 2026, 12:25 p.m. —

HTTP Status Breakdown

Response mix grouped by status class (2xx/3xx/4xx/5xx). Auto-loads a single aggregation and renders a donut.

Loading status mix…
Running one aggregation and rendering the chart.

Geolocation

Live geolocation and map tiles auto-load for this ASN snapshot (peer IPs with coordinates).

Loading map…

SUBNETS HELD BY THIS ISP

Derived from ISP snapshot peers (Option A). Grouped into IPv4 /24 and IPv6 /48 by default.
IPv4
IPv6
Limit
Loading subnets…

Interesting IPs

Top risky peers inside this ASN (latest snapshot). Sorted by risk score, then hits.

31.135.136.35 low
Open report
1 /100
Last seen 2026-02-21 02:00
Hits
5
Errors
2
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.142.59 low
Open report
0 /100
Last seen 2026-02-21 02:00
Hits
4
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.144.167 low
Open report
0 /100
Last seen 2026-02-15 02:00
Hits
4
Errors
2
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.154.13 low
Open report
0 /100
Last seen 2026-01-21 02:00
Hits
4
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.141.53 low
Open report
0 /100
Last seen 2026-01-27 02:00
Hits
3
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.150.112 low
Open report
0 /100
Last seen 2026-02-19 02:00
Hits
3
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
194.146.231.87 low
Open report
0 /100
Last seen 2026-01-23 02:00
Hits
3
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.132.79 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.134.132 low
Open report
0 /100
Last seen 2026-01-25 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.143.176 low
Open report
0 /100
Last seen 2026-02-18 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.144.208 low
Open report
0 /100
Last seen 2026-01-27 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.146.218 low
Open report
0 /100
Last seen 2026-02-16 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.147.241 low
Open report
0 /100
Last seen 2025-08-05 03:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.151.60 low
Open report
0 /100
Last seen 2026-01-23 02:00
Hits
2
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.153.83 low
Open report
0 /100
Last seen 2026-01-22 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.157.156 low
Open report
0 /100
Last seen 2026-02-12 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
91.201.227.103 low
Open report
0 /100
Last seen 2026-02-21 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.161.200 low
Open report
0 /100
Last seen 2026-01-23 02:00
Hits
2
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.128.77 low
Open report
0 /100
Last seen 2026-02-14 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.129.22 low
Open report
0 /100
Last seen 2026-01-28 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.130.16 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.130.179 low
Open report
0 /100
Last seen 2026-01-29 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.131.38 low
Open report
0 /100
Last seen 2026-02-14 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.131.174 low
Open report
0 /100
Last seen 2026-02-09 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.133.176 low
Open report
0 /100
Last seen 2026-01-25 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.134.56 low
Open report
0 /100
Last seen 2026-01-25 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.135.36 low
Open report
0 /100
Last seen 2025-09-18 03:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.135.208 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.136.30 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.138.84 low
Open report
0 /100
Last seen 2026-01-29 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.139.66 low
Open report
0 /100
Last seen 2026-02-22 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.139.144 low
Open report
0 /100
Last seen 2026-02-19 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.139.206 low
Open report
0 /100
Last seen 2026-02-19 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.143.10 low
Open report
0 /100
Last seen 2026-02-12 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.143.99 low
Open report
0 /100
Last seen 2026-02-14 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.144.58 low
Open report
0 /100
Last seen 2026-02-19 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.144.222 low
Open report
0 /100
Last seen 2026-01-28 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.145.20 low
Open report
0 /100
Last seen 2026-02-16 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.145.108 low
Open report
0 /100
Last seen 2026-02-18 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.145.237 low
Open report
0 /100
Last seen 2026-02-20 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.146.37 low
Open report
0 /100
Last seen 2026-01-23 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.147.99 low
Open report
0 /100
Last seen 2026-02-18 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.147.109 low
Open report
0 /100
Last seen 2026-02-15 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.147.222 low
Open report
0 /100
Last seen 2026-02-15 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.150.83 low
Open report
0 /100
Last seen 2026-02-10 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.151.198 low
Open report
0 /100
Last seen 2026-01-28 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.152.40 low
Open report
0 /100
Last seen 2026-01-25 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.152.115 low
Open report
0 /100
Last seen 2026-01-28 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.154.19 low
Open report
0 /100
Last seen 2026-01-21 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.156.52 low
Open report
0 /100
Last seen 2026-02-17 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.156.58 low
Open report
0 /100
Last seen 2026-02-07 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.156.201 low
Open report
0 /100
Last seen 2026-02-15 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.157.44 low
Open report
0 /100
Last seen 2026-02-17 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.157.135 low
Open report
0 /100
Last seen 2026-01-23 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.157.211 low
Open report
0 /100
Last seen 2026-02-21 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.158.1 low
Open report
0 /100
Last seen 2026-02-20 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
31.135.159.93 low
Open report
0 /100
Last seen 2026-01-27 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
91.201.226.232 low
Open report
0 /100
Last seen 2026-02-18 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.161.10 low
Open report
0 /100
Last seen 2026-02-02 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.161.94 low
Open report
0 /100
Last seen 2026-02-12 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.161.150 low
Open report
0 /100
Last seen 2026-02-14 02:00
Hits
1
Errors
1
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.163.150 low
Open report
0 /100
Last seen 2026-02-09 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.165.117 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.165.227 low
Open report
0 /100
Last seen 2026-02-08 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.166.19 low
Open report
0 /100
Last seen 2025-12-18 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.
94.199.167.82 low
Open report
0 /100
Last seen 2026-02-12 02:00
Hits
1
Errors
0
Country
Ukraine
ASN
AS20539
AS Org
Technical Centre Radio Systems Ltd.