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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: RedIRIS Autonomous System · Clear
Snapshot 2026-01-22 Results 6 Page 1 / 1

158.42.174.0/24

Risk Max — LOW Footprint 0.391% Hits 116
Prefix / IP version
/24 · IPv4
Network
158.42.174.0
Broadcast
158.42.174.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.4676 , -0.3771
Hits / Errors
116 hits · 31 errors
First / Last seen
2025-05-07 16:32 · 2025-05-08 19:29
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
UPV · Entidad Publica Empresarial Red.es
Top geo
Spain · Valencia · Valencia
Window / Updated
2025-05-05 → 2025-05-12 · Updated 2026-01-14 · v2
Open report →

212.128.65.0/24

Risk Max — LOW Footprint 0.391% Hits 62
Prefix / IP version
/24 · IPv4
Network
212.128.65.0
Broadcast
212.128.65.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.479 , -3.3565
Hits / Errors
62 hits · 18 errors
First / Last seen
2025-03-28 22:38 · 2025-03-29 02:33
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
Universidad de Alcala de Henares · RedIRIS Provider
Top geo
Spain · Madrid · Alcalá de Henares
Window / Updated
2025-03-24 → 2025-03-31 · Updated 2026-01-14 · v2
Open report →

150.244.2.0/24

Risk Max — LOW Footprint 0.391% Hits 58
Prefix / IP version
/24 · IPv4
Network
150.244.2.0
Broadcast
150.244.2.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.3086 , -3.7321
Hits / Errors
58 hits · 2 errors
First / Last seen
2025-05-13 11:59 · 2025-05-13 12:04
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
UAM · Entidad Publica Empresarial Red.es
Top geo
Spain · Madrid · Getafe
Window / Updated
2025-05-12 → 2025-05-19 · Updated 2026-01-14 · v2
Open report →

193.144.182.0/24

Risk Max — LOW Footprint 0.391% Hits 25
Prefix / IP version
/24 · IPv4
Network
193.144.182.0
Broadcast
193.144.182.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.4207 , -3.8407
Hits / Errors
25 hits · 0 errors
First / Last seen
2025-04-08 15:24 · 2025-04-08 15:24
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
Universidad de Cantabria · RedIRIS Provider
Top geo
Spain · Cantabria · Camargo
Window / Updated
2025-04-07 → 2025-04-14 · Updated 2026-01-14 · v2
Open report →

193.147.188.0/24

Risk Max — LOW Footprint 0.391% Hits 13
Prefix / IP version
/24 · IPv4
Network
193.147.188.0
Broadcast
193.147.188.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
37.3831 , -5.9707
Hits / Errors
13 hits · 1 errors
First / Last seen
2024-12-10 13:26 · 2024-12-10 13:37
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
Red de la Universidad Pablo de Olavide · RedIRIS Provider
Top geo
Spain · Andalusia · Seville
Window / Updated
2024-12-09 → 2024-12-16 · Updated 2026-01-14 · v2
Open report →

138.4.252.0/24

Risk Max — LOW Footprint 0.391% Hits 11
Prefix / IP version
/24 · IPv4
Network
138.4.252.0
Broadcast
138.4.252.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.4409 , -3.7033
Hits / Errors
11 hits · 0 errors
First / Last seen
2025-03-25 10:26 · 2025-03-25 10:32
Top ASN
AS766 · RedIRIS Autonomous System
Top organization / ISP
UPM · Entidad Publica Empresarial Red.es
Top geo
Spain · Madrid · Madrid
Window / Updated
2025-03-24 → 2025-03-31 · Updated 2026-01-14 · v2
Open report →