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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: Rousse · Clear
Snapshot 2026-01-20 Results 7 Page 1 / 1

109.121.136.0/24

Risk Max 17 LOW Footprint 0.391% Hits 297
Prefix / IP version
/24 · IPv4
Network
109.121.136.0
Broadcast
109.121.136.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
297 hits · 134 errors
First / Last seen
2025-05-28 03:37 · 2025-05-28 03:39
Top ASN
AS39396 · NBI Systems Ltd.
Top organization / ISP
Nbis Ltd. · NBI Systems Ltd.
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2025-05-26 → 2025-06-02 · Updated 2026-01-14 · v2
Open report →

213.130.79.0/24

Risk Max — LOW Footprint 0.391% Hits 18
Prefix / IP version
/24 · IPv4
Network
213.130.79.0
Broadcast
213.130.79.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
18 hits · 1 errors
First / Last seen
2024-12-27 01:07 · 2024-12-27 01:07
Top ASN
AS8866 · Vivacom Bulgaria EAD
Top organization / ISP
BTC-BROADBAND · Vivacom Bulgaria EAD
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2024-12-23 → 2024-12-30 · Updated 2026-01-14 · v2
Open report →

77.78.35.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
77.78.35.0
Broadcast
77.78.35.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
3 hits · 0 errors
First / Last seen
2023-12-18 16:51 · 2023-12-18 16:51
Top ASN
AS8866 · Vivacom Bulgaria EAD
Top organization / ISP
— · NETWORX-BG Ltd. - Charodeika
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2023-12-18 → 2023-12-25 · Updated 2026-01-14 · v2
Open report →

77.78.22.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
77.78.22.0
Broadcast
77.78.22.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
1 hits · 0 errors
First / Last seen
2025-12-17 23:37 · 2025-12-17 23:37
Top ASN
AS8866 · Vivacom Bulgaria EAD
Top organization / ISP
— · NETWORX-BG home-unl Center
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2025-12-15 → 2025-12-22 · Updated 2026-01-14 · v2
Open report →

213.91.199.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
213.91.199.0
Broadcast
213.91.199.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-12-14 08:28 · 2025-12-14 08:28
Top ASN
AS8866 · Vivacom Bulgaria EAD
Top organization / ISP
BTC-NET Ltd. · BTC-NET Ltd.
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2025-12-08 → 2025-12-15 · Updated 2026-01-14 · v2
Open report →

213.130.78.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
213.130.78.0
Broadcast
213.130.78.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8627 , 25.9648
Hits / Errors
1 hits · 0 errors
First / Last seen
2025-11-13 02:43 · 2025-11-13 02:43
Top ASN
AS8866 · Vivacom Bulgaria EAD
Top organization / ISP
BTC-BROADBAND · Vivacom Bulgaria EAD
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2025-11-10 → 2025-11-17 · Updated 2026-01-14 · v2
Open report →

213.240.232.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
213.240.232.0
Broadcast
213.240.232.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
43.8356 , 25.9657
Hits / Errors
1 hits · 0 errors
First / Last seen
2024-05-27 12:08 · 2024-05-27 12:08
Top ASN
AS13124 · A1 Bulgaria EAD
Top organization / ISP
A1 BG · A1 Bulgaria EAD
Top geo
Bulgaria · Ruse · Rousse
Window / Updated
2024-05-27 → 2024-06-03 · Updated 2026-01-14 · v2
Open report →