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Subnet Overview

Model: v1 Updated: Jan. 14, 2026, 10:59 a.m.
Report for 109.121.136.0/24 • Bulgaria • NBI Systems Ltd. City report ASN report

High-level context about this subnet: size, density, traffic, risk, and geographic footprint.

Traffic ready Risk ready Snapshot ready Window May 26, 2025, 1 a.m. → June 2, 2025, 1 a.m. Model v1
CIDR
109.121.136.0/24
Prefix
/24
IP Version
IPv4
Subnet Size
256
Network Address
109.121.136.0
Broadcast / Last
109.121.136.255
Observed IPs
1
Footprint
0.391%
Total Hits
297
Total Errors
134
Risk Score
17
Risk Level
low
First Seen
May 28, 2025, 3:37 a.m.
Last Seen
May 28, 2025, 3:39 a.m.
Top Location
Rousse , Ruse • Bulgaria
Top ASN
AS39396 • NBI Systems Ltd.

Risk

Model: v1
Subnet risk score
17
Low
Risk gradient
Contributors are derived from subnet annotator rollups and normalized to your short codes (e.g. sqli, cmdi, trav, sfp, bot).
Contributing annotators
cred 72 hits 237.60 pts
sfp 26 hits 125.84 pts
scan_velocity 36 hits 92.16 pts
ref 9 hits 1.62 pts
Technical summary
Computed at
Jan. 14, 2026, 10:34 a.m.
Raw total
457.22
Total hits
297
Errors
134

Traffic

Rollup

Daily activity (hits per day) plus HTTP response mix and basic counters from the subnet traffic rollup.

Loading activity…
Rendering hits per day for this subnet.
Daily activity (hits per day).

Annotators (All-time)

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

Severity →
Low High
cred
total=72 · weighted=237.60
Breakdown by severity band (all-time). “Weighted” reflects your weight coefficients/squash.
Severity Total Labels Weighted Top labels
10 36 1 198.00
cred 36
8 9 1 39.60
cred 9
0 27 1 0.00
cred 27
sfp
total=26 · weighted=125.84
Breakdown by severity band (all-time). “Weighted” reflects your weight coefficients/squash.
Severity Total Labels Weighted Top labels
22 26 1 125.84
sensitive_file 26
scan_velocity
total=36 · weighted=92.16
Breakdown by severity band (all-time). “Weighted” reflects your weight coefficients/squash.
Severity Total Labels Weighted Top labels
24 6 1 25.92
scan_velocity 6
26 3 1 14.04
scan_velocity 3
22 3 1 11.88
scan_velocity 3
20 3 1 10.80
scan_velocity 3
18 3 1 9.72
scan_velocity 3
16 3 1 8.64
scan_velocity 3
14 2 1 5.04
scan_velocity 2
12 2 1 4.32
scan_velocity 2
10 1 1 1.80
scan_velocity 1
0 10 1 0.00
scan_velocity 10
ref
total=9 · weighted=1.62
Breakdown by severity band (all-time). “Weighted” reflects your weight coefficients/squash.
Severity Total Labels Weighted Top labels
6 9 1 1.62
ref 9

HTTP Status Breakdown

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

Loading status mix…
Fetching one histogram and rendering the chart.

Geolocation

Live geolocation and map tiles auto-load for this subnet (all IPs with coordinates).

Loading map…

Interesting IPs

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

109.121.136.24 low
Open report
17 /100
Last seen 2025-05-28 03:39
Hits
297
Errors
134
Country
Bulgaria
ASN
AS39396
AS Org
NBI Systems Ltd.

Other subnets in this ASN / org

Compares other subnet snapshots matching this report’s ASN/org identity. “Same window” keeps the comparison within the latest snapshot window.

No matching peer subnets in the latest window.