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Interesting Subnets

Directory of active subnets observed by Syndu. Each row is the latest cached SubnetSnapshot per subnet and includes: density, traffic, geo/ASN representatives, and risk distribution.

20.194.161.0/24

Risk Max 33 LOW Footprint 0.391% Hits 94
Prefix / IP version
/24 · IPv4
Network
20.194.161.0
Broadcast
20.194.161.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
94 hits · 35 errors
First / Last seen
2024-01-24 06:36 · 2024-01-24 17:32
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-01-22 → 2024-01-29 · Updated 2026-01-14 · v2

52.185.158.0/24

Risk Max 12 LOW Footprint 0.391% Hits 332
Prefix / IP version
/24 · IPv4
Network
52.185.158.0
Broadcast
52.185.158.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
332 hits · 125 errors
First / Last seen
2025-07-22 00:52 · 2025-07-22 00:53
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-21 → 2025-07-28 · Updated 2026-01-14 · v2

172.207.242.0/24

Risk Max 11 LOW Footprint 0.391% Hits 286
Prefix / IP version
/24 · IPv4
Network
172.207.242.0
Broadcast
172.207.242.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
286 hits · 109 errors
First / Last seen
2025-07-22 01:13 · 2025-07-22 01:14
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-21 → 2025-07-28 · Updated 2026-01-14 · v2

20.18.48.0/24

Risk Max 10 LOW Footprint 0.391% Hits 408
Prefix / IP version
/24 · IPv4
Network
20.18.48.0
Broadcast
20.18.48.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
408 hits · 202 errors
First / Last seen
2025-10-16 12:19 · 2025-10-16 12:47
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-13 → 2025-10-20 · Updated 2026-01-14 · v2

20.18.34.0/24

Risk Max 10 LOW Footprint 0.391% Hits 160
Prefix / IP version
/24 · IPv4
Network
20.18.34.0
Broadcast
20.18.34.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
160 hits · 148 errors
First / Last seen
2023-08-25 09:12 · 2023-08-26 21:22
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2023-08-21 → 2023-08-28 · Updated 2026-01-14 · v2

4.189.255.0/24

Risk Max 9 LOW Footprint 0.391% Hits 47
Prefix / IP version
/24 · IPv4
Network
4.189.255.0
Broadcast
4.189.255.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
47 hits · 44 errors
First / Last seen
2024-10-15 00:14 · 2024-10-15 00:16
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-10-14 → 2024-10-21 · Updated 2026-01-14 · v2

172.207.241.0/24

Risk Max 7 LOW Footprint 0.391% Hits 274
Prefix / IP version
/24 · IPv4
Network
172.207.241.0
Broadcast
172.207.241.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
274 hits · 102 errors
First / Last seen
2025-07-15 10:00 · 2025-07-15 10:03
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-14 → 2025-07-21 · Updated 2026-01-14 · v2

172.192.49.0/24

Risk Max 7 LOW Footprint 0.391% Hits 237
Prefix / IP version
/24 · IPv4
Network
172.192.49.0
Broadcast
172.192.49.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
237 hits · 74 errors
First / Last seen
2025-07-23 11:06 · 2025-07-23 11:07
Top ASN
AS18747 · IFX Corporation
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-21 → 2025-07-28 · Updated 2026-01-14 · v2

172.207.228.0/24

Risk Max 7 LOW Footprint 0.391% Hits 226
Prefix / IP version
/24 · IPv4
Network
172.207.228.0
Broadcast
172.207.228.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
226 hits · 65 errors
First / Last seen
2025-07-23 22:55 · 2025-07-23 22:56
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-21 → 2025-07-28 · Updated 2026-01-14 · v2

48.218.113.0/24

Risk Max 4 LOW Footprint 0.391% Hits 182
Prefix / IP version
/24 · IPv4
Network
48.218.113.0
Broadcast
48.218.113.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
182 hits · 90 errors
First / Last seen
2025-10-15 15:49 · 2025-10-15 15:49
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-13 → 2025-10-20 · Updated 2026-01-14 · v2

74.176.69.0/24

Risk Max 3 LOW Footprint 0.391% Hits 281
Prefix / IP version
/24 · IPv4
Network
74.176.69.0
Broadcast
74.176.69.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
281 hits · 139 errors
First / Last seen
2025-10-11 14:10 · 2025-10-11 14:37
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-06 → 2025-10-13 · Updated 2026-01-14 · v2

172.192.51.0/24

Risk Max 3 LOW Footprint 0.391% Hits 163
Prefix / IP version
/24 · IPv4
Network
172.192.51.0
Broadcast
172.192.51.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
163 hits · 80 errors
First / Last seen
2025-10-28 01:09 · 2025-10-28 01:10
Top ASN
AS18747 · IFX Corporation
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-27 → 2025-11-03 · Updated 2026-01-14 · v2

74.176.199.0/24

Risk Max 3 LOW Footprint 0.391% Hits 150
Prefix / IP version
/24 · IPv4
Network
74.176.199.0
Broadcast
74.176.199.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
150 hits · 73 errors
First / Last seen
2025-10-15 07:53 · 2025-10-15 07:54
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-13 → 2025-10-20 · Updated 2026-01-14 · v2

74.176.198.0/24

Risk Max 3 LOW Footprint 0.391% Hits 150
Prefix / IP version
/24 · IPv4
Network
74.176.198.0
Broadcast
74.176.198.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
150 hits · 73 errors
First / Last seen
2025-10-15 04:04 · 2025-10-15 04:05
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-13 → 2025-10-20 · Updated 2026-01-14 · v2

20.222.237.0/24

Risk Max 3 LOW Footprint 0.391% Hits 8
Prefix / IP version
/24 · IPv4
Network
20.222.237.0
Broadcast
20.222.237.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
8 hits · 0 errors
First / Last seen
2025-05-26 02:21 · 2025-05-26 02:21
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-05-26 → 2025-06-02 · Updated 2026-01-14 · v2

4.189.152.0/24

Risk Max 2 LOW Footprint 0.391% Hits 196
Prefix / IP version
/24 · IPv4
Network
4.189.152.0
Broadcast
4.189.152.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
196 hits · 79 errors
First / Last seen
2025-11-25 18:57 · 2025-11-25 18:59
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-11-24 → 2025-12-01 · Updated 2026-01-14 · v2

4.241.208.0/24

Risk Max 2 LOW Footprint 0.391% Hits 160
Prefix / IP version
/24 · IPv4
Network
4.241.208.0
Broadcast
4.241.208.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
160 hits · 57 errors
First / Last seen
2025-11-25 23:07 · 2025-11-25 23:10
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-11-24 → 2025-12-01 · Updated 2026-01-14 · v2

48.218.66.0/24

Risk Max 2 LOW Footprint 0.391% Hits 46
Prefix / IP version
/24 · IPv4
Network
48.218.66.0
Broadcast
48.218.66.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
46 hits · 23 errors
First / Last seen
2025-11-10 00:56 · 2025-11-10 00:56
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-11-10 → 2025-11-17 · Updated 2026-01-14 · v2

20.194.193.0/24

Risk Max 2 LOW Footprint 0.391% Hits 31
Prefix / IP version
/24 · IPv4
Network
20.194.193.0
Broadcast
20.194.193.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
31 hits · 26 errors
First / Last seen
2025-08-17 14:05 · 2025-08-17 14:07
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-08-11 → 2025-08-18 · Updated 2026-01-14 · v2

20.18.71.0/24

Risk Max 2 LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
20.18.71.0
Broadcast
20.18.71.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
1 hits · 0 errors
First / Last seen
2024-12-28 23:00 · 2024-12-28 23:00
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-12-23 → 2024-12-30 · Updated 2026-01-14 · v2

4.241.179.0/24

Risk Max 1 LOW Footprint 0.391% Hits 80
Prefix / IP version
/24 · IPv4
Network
4.241.179.0
Broadcast
4.241.179.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
80 hits · 39 errors
First / Last seen
2025-11-25 15:34 · 2025-11-25 15:35
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-11-24 → 2025-12-01 · Updated 2026-01-14 · v2

52.185.159.0/24

Risk Max 1 LOW Footprint 0.391% Hits 58
Prefix / IP version
/24 · IPv4
Network
52.185.159.0
Broadcast
52.185.159.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
58 hits · 28 errors
First / Last seen
2025-10-22 08:29 · 2025-10-22 08:29
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-20 → 2025-10-27 · Updated 2026-01-14 · v2

48.210.8.0/24

Risk Max 1 LOW Footprint 0.391% Hits 49
Prefix / IP version
/24 · IPv4
Network
48.210.8.0
Broadcast
48.210.8.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
49 hits · 17 errors
First / Last seen
2025-10-22 11:20 · 2025-10-22 11:21
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-10-20 → 2025-10-27 · Updated 2026-01-14 · v2

20.63.140.0/24

Risk Max 1 LOW Footprint 0.391% Hits 12
Prefix / IP version
/24 · IPv4
Network
20.63.140.0
Broadcast
20.63.140.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
12 hits · 6 errors
First / Last seen
2023-11-14 08:06 · 2023-11-14 08:06
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2023-11-13 → 2023-11-20 · Updated 2026-01-14 · v2

20.243.200.0/24

Risk Max 1 LOW Footprint 0.391% Hits 8
Prefix / IP version
/24 · IPv4
Network
20.243.200.0
Broadcast
20.243.200.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
8 hits · 4 errors
First / Last seen
2024-11-27 17:46 · 2024-11-27 17:46
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-11-25 → 2024-12-02 · Updated 2026-01-14 · v2

20.63.136.0/24

Risk Max 1 LOW Footprint 0.391% Hits 8
Prefix / IP version
/24 · IPv4
Network
20.63.136.0
Broadcast
20.63.136.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
8 hits · 4 errors
First / Last seen
2023-08-21 18:15 · 2023-08-21 21:37
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2023-08-21 → 2023-08-28 · Updated 2026-01-14 · v2

20.222.230.0/24

Risk Max 1 LOW Footprint 0.391% Hits 7
Prefix / IP version
/24 · IPv4
Network
20.222.230.0
Broadcast
20.222.230.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
7 hits · 3 errors
First / Last seen
2024-01-21 20:38 · 2024-01-21 20:38
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-01-15 → 2024-01-22 · Updated 2026-01-14 · v2

172.207.80.0/24

Risk Max 1 LOW Footprint 0.391% Hits 6
Prefix / IP version
/24 · IPv4
Network
172.207.80.0
Broadcast
172.207.80.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
6 hits · 2 errors
First / Last seen
2025-06-19 18:28 · 2025-06-19 18:28
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-06-16 → 2025-06-23 · Updated 2026-01-14 · v2

52.156.36.0/24

Risk Max 1 LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
52.156.36.0
Broadcast
52.156.36.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
3 hits · 0 errors
First / Last seen
2025-03-12 22:34 · 2025-03-12 22:34
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-03-10 → 2025-03-17 · Updated 2026-01-14 · v2

20.89.177.0/24

Risk Max 1 LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
20.89.177.0
Broadcast
20.89.177.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
2 hits · 0 errors
First / Last seen
2024-12-17 15:17 · 2024-12-17 15:17
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-12-16 → 2024-12-23 · Updated 2026-01-14 · v2

48.218.168.0/24

Risk Max LOW Footprint 0.781% Hits 6
Prefix / IP version
/24 · IPv4
Network
48.218.168.0
Broadcast
48.218.168.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
6 hits · 0 errors
First / Last seen
2025-05-20 19:44 · 2025-05-21 03:33
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-05-19 → 2025-05-26 · Updated 2026-01-14 · v2

172.192.59.0/24

Risk Max LOW Footprint 0.781% Hits 3
Prefix / IP version
/24 · IPv4
Network
172.192.59.0
Broadcast
172.192.59.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
3 hits · 0 errors
First / Last seen
2025-08-12 14:38 · 2025-08-16 10:26
Top ASN
AS18747 · IFX Corporation
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-08-11 → 2025-08-18 · Updated 2026-01-14 · v2

172.207.159.0/24

Risk Max LOW Footprint 0.781% Hits 3
Prefix / IP version
/24 · IPv4
Network
172.207.159.0
Broadcast
172.207.159.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
3 hits · 0 errors
First / Last seen
2025-07-31 19:56 · 2025-08-02 13:07
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-28 → 2025-08-04 · Updated 2026-01-14 · v2

48.210.47.0/24

Risk Max LOW Footprint 0.781% Hits 3
Prefix / IP version
/24 · IPv4
Network
48.210.47.0
Broadcast
48.210.47.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
3 hits · 0 errors
First / Last seen
2025-07-28 22:31 · 2025-07-31 05:47
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-28 → 2025-08-04 · Updated 2026-01-14 · v2

20.194.157.0/24

Risk Max LOW Footprint 0.781% Hits 2
Prefix / IP version
/24 · IPv4
Network
20.194.157.0
Broadcast
20.194.157.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-12-17 07:24 · 2025-12-17 10:40
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-12-15 → 2025-12-22 · Updated 2026-01-14 · v2

172.207.240.0/24

Risk Max LOW Footprint 0.781% Hits 2
Prefix / IP version
/24 · IPv4
Network
172.207.240.0
Broadcast
172.207.240.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-08-12 02:17 · 2025-08-13 11:39
Top ASN
Top organization / ISP
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-08-11 → 2025-08-18 · Updated 2026-01-14 · v2

130.33.59.0/24

Risk Max LOW Footprint 0.781% Hits 2
Prefix / IP version
/24 · IPv4
Network
130.33.59.0
Broadcast
130.33.59.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-07-29 00:29 · 2025-07-29 15:51
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-07-28 → 2025-08-04 · Updated 2026-01-14 · v2

48.210.68.0/24

Risk Max LOW Footprint 0.391% Hits 140
Prefix / IP version
/24 · IPv4
Network
48.210.68.0
Broadcast
48.210.68.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
140 hits · 63 errors
First / Last seen
2024-11-19 10:12 · 2024-11-20 20:44
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-11-18 → 2024-11-25 · Updated 2026-01-14 · v2

74.226.144.0/24

Risk Max LOW Footprint 0.391% Hits 100
Prefix / IP version
/24 · IPv4
Network
74.226.144.0
Broadcast
74.226.144.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
100 hits · 45 errors
First / Last seen
2024-11-11 19:15 · 2024-11-12 14:47
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2024-11-11 → 2024-11-18 · Updated 2026-01-14 · v2

4.216.96.0/24

Risk Max LOW Footprint 0.391% Hits 63
Prefix / IP version
/24 · IPv4
Network
4.216.96.0
Broadcast
4.216.96.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
35.68 , 139.77
Hits / Errors
63 hits · 24 errors
First / Last seen
2025-03-11 22:34 · 2025-03-12 18:11
Top ASN
Top geo
Japan · Tokyo · Tokyo
Window / Updated
2025-03-10 → 2025-03-17 · Updated 2026-01-14 · v2
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