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ASN REPORT — AS21859 · Zenlayer Inc

First sighted: April 30, 2023, 3 a.m. · Last sighted: Feb. 23, 2026, 2 a.m.

Risk
88 (high)
Total hits
13991
Total errors
1779
Observed IPs
4061
Top country
Vietnam
Top city
Tseung Kwan O
Top region
Washington

Risk

Model: v1 Computed: 2026-02-27 17:09:49
Risk score
88
High
Risk gradient
Key drivers are enriched against the published annotator catalog when available; otherwise sensible defaults are used.
Key drivers
Command injection attempts
Request content resembles attempts to execute OS commands via an application.
cmdi
Hits 122
Points 2694.50
Path traversal attempts
Request paths/parameters resemble attempts to access files outside intended directories.
trav
Hits 108
Points 780.00
Automated client behavior
Traffic patterns strongly suggest automation rather than a human-operated browser.
bot
Hits 1070
Points 428.00
Credential brute forcing
Repeated authentication attempts consistent with password guessing or credential stuffing.
cred
Hits 131
Points 404.80
Sensitive file probing
Requests target commonly sensitive files, configs, backups, or administrative resources.
sfp
Hits 51
Points 363.88
Firewall probing
Traffic behavior suggests probing of access controls and protected surfaces.
fwprobe
Hits 31
Points 325.80
Scan velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
scan_velocity
Hits 76
Points 169.20
Protocol anomaly
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
proto
Hits 54
Points 42.24
User-Agent anomaly
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
ua
Hits 242
Points 40.68
HTTP method anomaly
Unusual or unexpected HTTP methods observed for the target endpoints.
method
Hits 38
Points 18.24
Request size anomaly
Requests are unusually large or shaped in a way that suggests abuse or automation.
request_size
Hits 30
Points 3.60
Referrer abuse
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
ref
Hits 12
Points 2.16

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
12212
3xx
0
4xx
1779
5xx
0
Unique URLs
0
Total hits
13991
First seen
April 30, 2023, 3 a.m.
Last seen
Feb. 23, 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
Request content resembles attempts to execute OS commands via an application.
hits 122 pts 2694.50
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
28 49 42 1166.20 Nov. 17, 2024, 1:06 a.m. Aug. 12, 2025, 11:29 a.m.
22 49 42 916.30 Nov. 17, 2024, 1:06 a.m. Aug. 12, 2025, 11:29 a.m.
30 24 20 612.00 Jan. 23, 2025, 10:48 p.m. May 17, 2025, 7:50 a.m.
Request paths/parameters resemble attempts to access files outside intended directories.
hits 108 pts 780.00
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
28 40 8 291.20 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
26 40 8 270.40 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
30 28 8 218.40 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:18 a.m.
Traffic patterns strongly suggest automation rather than a human-operated browser.
hits 1070 pts 428.00
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
8 1070 234 428.00 July 5, 2023, 11:14 p.m. Feb. 16, 2026, 11:51 p.m.
Repeated authentication attempts consistent with password guessing or credential stuffing.
hits 131 pts 404.80
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 72 37 396.00 Nov. 15, 2023, 3:43 a.m. Feb. 18, 2026, 11:36 a.m.
8 2 2 8.80 Jan. 28, 2026, 7:35 a.m. Feb. 18, 2026, 11:36 a.m.
0 57 37 0.00 Nov. 15, 2023, 3:43 a.m. Feb. 18, 2026, 11:36 a.m.
Requests target commonly sensitive files, configs, backups, or administrative resources.
hits 51 pts 363.88
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
34 40 8 299.20 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:29 a.m.
40 3 3 26.40 Jan. 28, 2026, 10:50 p.m. Feb. 1, 2026, 12:42 a.m.
22 5 2 24.20 July 3, 2025, 2:48 p.m. Jan. 27, 2026, 7:45 p.m.
24 2 1 10.56 Jan. 28, 2026, 7:35 a.m. Jan. 28, 2026, 7:35 a.m.
16 1 1 3.52 Jan. 29, 2026, 2:19 a.m. Jan. 29, 2026, 2:19 a.m.
Traffic behavior suggests probing of access controls and protected surfaces.
hits 31 pts 325.80
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
22 24 15 237.60 Nov. 12, 2024, 4:10 a.m. Feb. 14, 2026, 7:27 a.m.
28 7 6 88.20 Nov. 20, 2023, 9:14 p.m. Sept. 20, 2024, 3 a.m.
Scan velocity scan_velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
hits 76 pts 169.20
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
20 18 5 64.80 Nov. 17, 2024, 1:06 a.m. Dec. 5, 2024, 7:25 a.m.
22 12 5 47.52 Nov. 17, 2024, 1:06 a.m. Dec. 5, 2024, 7:25 a.m.
18 10 5 32.40 Nov. 17, 2024, 1:05 a.m. Dec. 5, 2024, 7:25 a.m.
16 6 3 17.28 Nov. 17, 2024, 1:05 a.m. Dec. 5, 2024, 7:24 a.m.
10 4 3 7.20 Dec. 19, 2023, 10:12 p.m. Feb. 2, 2025, 7:44 a.m.
0 26 8 0.00 Dec. 19, 2023, 10:12 p.m. Feb. 2, 2025, 7:44 a.m.
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
hits 54 pts 42.24
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
11 30 20 26.40 Sept. 12, 2024, 4:06 a.m. Jan. 22, 2026, 11:12 a.m.
12 14 8 13.44 Nov. 17, 2024, 1:05 a.m. Aug. 12, 2025, 11:15 a.m.
3 10 9 2.40 Sept. 12, 2024, 11:25 a.m. Aug. 7, 2025, 11:19 p.m.
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
hits 242 pts 40.68
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 118 31 23.60 Aug. 13, 2023, 6:40 p.m. Feb. 11, 2026, 4:56 a.m.
6 77 53 9.24 Nov. 15, 2023, 3:46 a.m. Aug. 7, 2025, 11:19 p.m.
8 43 22 6.88 Aug. 13, 2023, 6:39 p.m. Aug. 19, 2025, 10:24 a.m.
12 4 1 0.96 July 3, 2025, 2:48 p.m. July 3, 2025, 2:48 p.m.
Unusual or unexpected HTTP methods observed for the target endpoints.
hits 38 pts 18.24
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
8 38 7 18.24 Sept. 12, 2024, 4:06 a.m. Jan. 4, 2025, 2:58 a.m.
Requests are unusually large or shaped in a way that suggests abuse or automation.
hits 30 pts 3.60
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
12 5 5 3.60 July 5, 2023, 11:14 p.m. Nov. 28, 2025, 5:27 p.m.
0 25 9 0.00 Dec. 27, 2024, 12:51 p.m. Nov. 28, 2025, 5:27 p.m.
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
hits 12 pts 2.16
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
6 12 10 2.16 Nov. 15, 2023, 3:43 a.m. Feb. 10, 2025, 10:54 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.

156.59.198.136 high
96 /100
Last seen 2026-02-12 02:00
Hits
546
Errors
44
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
128.14.129.10 med
56 /100
Last seen 2024-12-06 02:00
Hits
142
Errors
132
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
156.59.199.78 low
32 /100
Last seen 2024-11-18 02:00
Hits
96
Errors
88
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
128.14.23.34 low
20 /100
Last seen 2025-08-13 03:00
Hits
61
Errors
57
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
156.59.198.135 low
9 /100
Last seen 2026-02-17 02:00
Hits
540
Errors
48
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
107.151.182.58 low
7 /100
Last seen 2024-09-21 03:00
Hits
110
Errors
40
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.23 low
5 /100
Last seen 2025-05-11 03:00
Hits
75
Errors
46
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.60 low
5 /100
Last seen 2025-02-03 02:00
Hits
52
Errors
23
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
156.225.11.231 low
5 /100
Last seen 2025-05-12 03:00
Hits
13
Errors
3
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.22 low
4 /100
Last seen 2025-02-11 02:00
Hits
81
Errors
31
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.24 low
4 /100
Last seen 2025-02-11 02:00
Hits
69
Errors
26
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
107.151.182.62 low
3 /100
Last seen 2024-09-10 03:00
Hits
88
Errors
32
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
128.14.211.194 low
3 /100
Last seen 2024-04-22 03:00
Hits
77
Errors
27
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.58 low
3 /100
Last seen 2025-02-03 02:00
Hits
47
Errors
14
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.59 low
3 /100
Last seen 2025-02-03 02:00
Hits
46
Errors
12
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
107.151.182.54 low
2 /100
Last seen 2024-02-17 02:00
Hits
73
Errors
32
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.63 low
2 /100
Last seen 2025-01-16 02:00
Hits
30
Errors
18
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
193.118.52.30 low
1 /100
Last seen 2024-09-19 03:00
Hits
65
Errors
16
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.57 low
1 /100
Last seen 2025-02-03 02:00
Hits
64
Errors
23
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.25 low
1 /100
Last seen 2025-05-11 03:00
Hits
58
Errors
29
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
193.118.52.22 low
1 /100
Last seen 2024-05-07 03:00
Hits
37
Errors
16
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.69 low
1 /100
Last seen 2025-04-06 03:00
Hits
30
Errors
23
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
107.151.150.64 low
1 /100
Last seen 2024-09-18 03:00
Hits
20
Errors
8
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.17 low
1 /100
Last seen 2025-07-31 03:00
Hits
18
Errors
1
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.90 low
1 /100
Last seen 2026-02-15 02:00
Hits
15
Errors
14
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.85 low
1 /100
Last seen 2025-09-22 03:00
Hits
14
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.82 low
1 /100
Last seen 2025-09-22 03:00
Hits
9
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
156.59.222.145 low
0 /100
Last seen 2025-09-16 03:00
Hits
114
Errors
29
Country
Malaysia
ASN
AS21859
AS Org
Zenlayer Inc
162.221.192.26 low
0 /100
Last seen 2023-12-30 02:00
Hits
53
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
23.251.102.74 low
0 /100
Last seen 2024-01-03 02:00
Hits
45
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.62 low
0 /100
Last seen 2025-01-16 02:00
Hits
39
Errors
33
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
193.118.53.194 low
0 /100
Last seen 2024-01-16 02:00
Hits
37
Errors
2
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
128.14.209.162 low
0 /100
Last seen 2024-01-02 02:00
Hits
36
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
128.14.141.34 low
0 /100
Last seen 2023-10-21 03:00
Hits
35
Errors
1
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
23.90.165.142 low
0 /100
Last seen 2024-09-13 03:00
Hits
34
Errors
0
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
128.14.173.99 low
0 /100
Last seen 2024-09-29 03:00
Hits
33
Errors
2
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.64 low
0 /100
Last seen 2025-01-16 02:00
Hits
31
Errors
27
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.67 low
0 /100
Last seen 2025-04-06 03:00
Hits
31
Errors
21
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
128.1.248.26 low
0 /100
Last seen 2023-10-25 03:00
Hits
30
Errors
2
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
128.1.248.42 low
0 /100
Last seen 2023-10-25 03:00
Hits
23
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
128.14.133.58 low
0 /100
Last seen 2024-01-16 02:00
Hits
23
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
128.14.173.117 low
0 /100
Last seen 2024-09-29 03:00
Hits
23
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.68 low
0 /100
Last seen 2025-04-06 03:00
Hits
22
Errors
16
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
162.128.163.220 low
0 /100
Last seen 2025-11-23 02:00
Hits
20
Errors
3
Country
Singapore
ASN
AS21859
AS Org
Zenlayer Inc
98.96.193.67 low
0 /100
Last seen 2024-02-20 02:00
Hits
18
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
156.59.80.82 low
0 /100
Last seen 2025-02-15 02:00
Hits
18
Errors
0
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.65 low
0 /100
Last seen 2025-01-16 02:00
Hits
18
Errors
9
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
45.156.131.27 low
0 /100
Last seen 2024-11-13 02:00
Hits
17
Errors
11
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
107.151.158.178 low
0 /100
Last seen 2025-10-12 03:00
Hits
17
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.197.70 low
0 /100
Last seen 2025-04-06 03:00
Hits
17
Errors
13
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
188.191.96.29 low
0 /100
Last seen 2025-08-15 03:00
Hits
17
Errors
2
Country
France
ASN
AS21859
AS Org
Zenlayer Inc
98.98.197.211 low
0 /100
Last seen 2024-12-28 02:00
Hits
16
Errors
0
Country
Nigeria
ASN
AS21859
AS Org
Zenlayer Inc
101.33.14.28 low
0 /100
Last seen 2025-12-17 02:00
Hits
16
Errors
2
Country
Vietnam
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.87 low
0 /100
Last seen 2026-02-15 02:00
Hits
16
Errors
12
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
169.197.125.14 low
0 /100
Last seen 2024-12-06 02:00
Hits
16
Errors
8
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
43.174.120.153 low
0 /100
Last seen 2026-02-02 02:00
Hits
15
Errors
4
Country
Vietnam
ASN
AS21859
AS Org
Zenlayer Inc
128.1.171.2 low
0 /100
Last seen 2025-05-09 03:00
Hits
15
Errors
0
Country
United Kingdom
ASN
AS21859
AS Org
Zenlayer Inc
155.2.219.244 low
0 /100
Last seen 2025-09-30 03:00
Hits
15
Errors
0
Country
Brazil
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.19 low
0 /100
Last seen 2025-07-31 03:00
Hits
15
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
108.165.116.157 low
0 /100
Last seen 2026-02-01 02:00
Hits
14
Errors
0
Country
Philippines
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.83 low
0 /100
Last seen 2025-09-22 03:00
Hits
14
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
185.226.196.18 low
0 /100
Last seen 2025-07-31 03:00
Hits
14
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
193.118.51.150 low
0 /100
Last seen 2024-01-26 02:00
Hits
14
Errors
0
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
43.174.120.170 low
0 /100
Last seen 2025-11-29 02:00
Hits
13
Errors
1
Country
Vietnam
ASN
AS21859
AS Org
Zenlayer Inc
43.174.120.171 low
0 /100
Last seen 2025-11-26 02:00
Hits
13
Errors
0
Country
Vietnam
ASN
AS21859
AS Org
Zenlayer Inc
45.43.33.218 low
0 /100
Last seen 2025-09-21 03:00
Hits
13
Errors
0
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
128.14.209.34 low
0 /100
Last seen 2024-05-21 03:00
Hits
13
Errors
0
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
103.122.177.150 low
0 /100
Last seen 2025-04-30 03:00
Hits
12
Errors
3
Country
Hong Kong
ASN
AS21859
AS Org
Zenlayer Inc
108.165.138.206 low
0 /100
Last seen 2026-01-31 02:00
Hits
12
Errors
1
Country
Vietnam
ASN
AS21859
AS Org
Zenlayer Inc
193.118.51.126 low
0 /100
Last seen 2024-05-14 03:00
Hits
12
Errors
0
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
23.90.165.133 low
0 /100
Last seen 2024-09-19 03:00
Hits
11
Errors
2
Country
The Netherlands
ASN
AS21859
AS Org
Zenlayer Inc
45.156.131.29 low
0 /100
Last seen 2024-11-13 02:00
Hits
11
Errors
7
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc
108.165.129.147 low
0 /100
Last seen 2026-02-01 02:00
Hits
11
Errors
0
Country
Malaysia
ASN
AS21859
AS Org
Zenlayer Inc
108.165.215.168 low
0 /100
Last seen 2026-01-30 02:00
Hits
11
Errors
0
Country
Malaysia
ASN
AS21859
AS Org
Zenlayer Inc
109.105.210.89 low
0 /100
Last seen 2026-02-15 02:00
Hits
11
Errors
10
Country
United States
ASN
AS21859
AS Org
Zenlayer Inc