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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: CABLE & FIBERLINK · Clear
Snapshot 2026-01-26 Results 6 Page 1 / 1

121.91.222.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
121.91.222.0
Broadcast
121.91.222.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.7447 , -75.5484
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-07-09 21:12 · 2025-07-09 21:12
Top ASN
AS6079 · RCN
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Delaware · Wilmington
Window / Updated
2025-07-07 → 2025-07-14 · Updated 2026-01-14 · v2
Open report →

121.91.225.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
121.91.225.0
Broadcast
121.91.225.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
41.8781 , -87.6298
Hits / Errors
2 hits · 0 errors
First / Last seen
2024-01-26 03:15 · 2024-01-26 03:15
Top ASN
AS7029 · Windstream Communications LLC
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Illinois · Chicago
Window / Updated
2024-01-22 → 2024-01-29 · Updated 2026-01-14 · v2
Open report →

121.91.215.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
121.91.215.0
Broadcast
121.91.215.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.7447 , -75.5484
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-10-05 23:44 · 2025-10-05 23:44
Top ASN
AS6079 · RCN
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Delaware · Wilmington
Window / Updated
2025-09-29 → 2025-10-06 · Updated 2026-01-14 · v2
Open report →

121.91.211.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
121.91.211.0
Broadcast
121.91.211.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.7447 , -75.5484
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-08-03 15:59 · 2025-08-03 15:59
Top ASN
AS6079 · RCN
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Delaware · Wilmington
Window / Updated
2025-07-28 → 2025-08-04 · Updated 2026-01-14 · v2
Open report →

121.91.220.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
121.91.220.0
Broadcast
121.91.220.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.7447 , -75.5484
Hits / Errors
1 hits · 0 errors
First / Last seen
2025-07-25 16:51 · 2025-07-25 16:51
Top ASN
AS6079 · RCN
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Delaware · Wilmington
Window / Updated
2025-07-21 → 2025-07-28 · Updated 2026-01-14 · v2
Open report →

121.91.213.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
121.91.213.0
Broadcast
121.91.213.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.7447 , -75.5484
Hits / Errors
1 hits · 0 errors
First / Last seen
2025-02-14 22:03 · 2025-02-14 22:03
Top ASN
AS6079 · RCN
Top organization / ISP
CABLE & FIBERLINK · Rackdog
Top geo
United States · Delaware · Wilmington
Window / Updated
2025-02-10 → 2025-02-17 · Updated 2026-01-14 · v2
Open report →