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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.
Active filter: Sakai · Clear
Snapshot 2026-03-07 Results 7 Page 1 / 1

121.87.209.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
121.87.209.0
Broadcast
121.87.209.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5742 , 135.4777
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-25 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
K-Opticom Corporation · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

121.87.177.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
121.87.177.0
Broadcast
121.87.177.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5963 , 135.4868
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
K-Opticom Corporation · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

119.229.217.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
119.229.217.0
Broadcast
119.229.217.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5709 , 135.4537
Hits / Errors
2 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-26 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
K-Opticom Corporation · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

153.252.8.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
153.252.8.0
Broadcast
153.252.8.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5963 , 135.4868
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-27 02:00 · 2026-02-28 02:00
Top ASN
AS4713 · NTT DOCOMO BUSINESS,Inc.
Top organization / ISP
Open Computer Network · NTT Communications Corporation
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

182.165.242.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
182.165.242.0
Broadcast
182.165.242.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5709 , 135.4537
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
K-Opticom Corporation · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

121.86.147.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
121.86.147.0
Broadcast
121.86.147.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5963 , 135.4868
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
OPTAGE Inc. · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

59.190.97.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
59.190.97.0
Broadcast
59.190.97.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
34.5963 , 135.4868
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS17511 · OPTAGE Inc.
Top organization / ISP
OPTAGE Inc. · OPTAGE Inc.
Top geo
Japan · Osaka · Sakai
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →