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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: Viseu · Clear
Snapshot 2026-03-07 Results 30 Page 1 / 1

181.224.51.0/24

Risk Max — LOW Footprint 1.562% Hits 8
Prefix / IP version
/24 · IPv4
Network
181.224.51.0
Broadcast
181.224.51.255
Observed IPs / Subnet size
4 observed · 256 total
Centroid
-1.302 , -46.3208
Hits / Errors
8 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-28 02:00
Top ASN
AS271496 · BNET RIO PROVEDOR DE ACESSO A INTERNET LTDA
Top organization / ISP
Edivaldo Santos Consultoria E Tecnologia EM ISP · Bnet RIO Provedor De Acesso A Internet Ltda
Top geo
Brazil · Pará · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

213.22.23.0/24

Risk Max — LOW Footprint 1.172% Hits 4
Prefix / IP version
/24 · IPv4
Network
213.22.23.0
Broadcast
213.22.23.255
Observed IPs / Subnet size
3 observed · 256 total
Centroid
40.86125 , -8.080884999999999
Hits / Errors
4 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-26 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
TVCABO-Portugal · NOS Comunicacoes S.A.
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

213.22.20.0/24

Risk Max — LOW Footprint 1.172% Hits 3
Prefix / IP version
/24 · IPv4
Network
213.22.20.0
Broadcast
213.22.20.255
Observed IPs / Subnet size
3 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
TVCABO-Portugal · NOS Comunicacoes S.A.
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

45.187.130.0/24

Risk Max — LOW Footprint 0.781% Hits 6
Prefix / IP version
/24 · IPv4
Network
45.187.130.0
Broadcast
45.187.130.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
-1.3019999999999998 , -46.3208
Hits / Errors
6 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-03-02 02:00
Top ASN
AS269466 · DW TELECOM LTDA
Top organization / ISP
DW TELECOM LTDA · W da S Paixao
Top geo
Brazil · Pará · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

94.132.9.0/24

Risk Max — LOW Footprint 0.391% Hits 6
Prefix / IP version
/24 · IPv4
Network
94.132.9.0
Broadcast
94.132.9.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
6 hits · 0 errors
First / Last seen
2026-02-24 02:00 · 2026-02-26 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
NOS Comunicacoes S.A. · NOS COMUNICACOES S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.80.179.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
188.80.179.0
Broadcast
188.80.179.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.5102 , -8.0834
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Tondela
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.81.203.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
188.81.203.0
Broadcast
188.81.203.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.7448 , -7.733999999999999
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-24 02:00 · 2026-02-25 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Sátão
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.251.78.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
188.251.78.0
Broadcast
188.251.78.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.82.115.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
188.82.115.0
Broadcast
188.82.115.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

2.81.113.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
2.81.113.0
Broadcast
2.81.113.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

84.91.204.0/24

Risk Max — LOW Footprint 0.391% Hits 3
Prefix / IP version
/24 · IPv4
Network
84.91.204.0
Broadcast
84.91.204.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.9893 , -7.6161
Hits / Errors
3 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS13156 · NOWO COMMUNICATIONS, S.A.
Top organization / ISP
Nowo · NOWO COMMUNICATIONS, S.A.
Top geo
Portugal · Viseu · Moimenta da Beira
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

2.82.56.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
2.82.56.0
Broadcast
2.82.56.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
41.101 , -7.8106
Hits / Errors
2 hits · 1 errors
First / Last seen
2026-02-23 02:00 · 2026-02-26 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Viseu · Lamego
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

2.83.181.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
2.83.181.0
Broadcast
2.83.181.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
2 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

191.243.170.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
191.243.170.0
Broadcast
191.243.170.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
-1.19667 , -46.14
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-03-01 02:00 · 2026-03-02 02:00
Top ASN
AS263508 · SIMNET TELECOMUNICACOES LTDA
Top organization / ISP
Conect Evolucao E Tecnologia Ltda · Simnet Telecomunicacoes Ltda
Top geo
Brazil · Pará · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.82.15.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
188.82.15.0
Broadcast
188.82.15.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.7227 , -7.8335
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-28 02:00 · 2026-03-01 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.80.10.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
188.80.10.0
Broadcast
188.80.10.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.602 , -7.7688
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Mangualde
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.83.104.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
188.83.104.0
Broadcast
188.83.104.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.5119 , -8.0828
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Tondela
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

2.81.98.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
2.81.98.0
Broadcast
2.81.98.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.2135 , -7.4453
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Castelo Branco · Pêro Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

83.132.53.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
83.132.53.0
Broadcast
83.132.53.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.7418 , -7.73285
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
NOS Comunicacoes S.A. · NOS COMUNICACOES S.A
Top geo
Portugal · Viseu · Sátão
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

2.81.168.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
2.81.168.0
Broadcast
2.81.168.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-24 02:00 · 2026-02-25 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · PT Comunicacoes S.A
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

148.69.156.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
148.69.156.0
Broadcast
148.69.156.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.5565 , -8.13432
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS12353 · Vodafone Portugal
Top organization / ISP
Vodafone Portugal - Communicacoes Pessoais S.A. · Vodafone Portugal
Top geo
Portugal · Viseu · Campo de Besteiros
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

188.82.41.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
188.82.41.0
Broadcast
188.82.41.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6801 , -7.6996
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS3243 · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.
Top organization / ISP
PT Comunicacoes S.A. · MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A
Top geo
Portugal · Viseu · Penalva do Castelo
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

217.129.164.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
217.129.164.0
Broadcast
217.129.164.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS13156 · NOWO COMMUNICATIONS, S.A.
Top organization / ISP
Nowo Communications, S.A. · Nowo Communications
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

84.91.173.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
84.91.173.0
Broadcast
84.91.173.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
41.101 , -7.8106
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS13156 · NOWO COMMUNICATIONS, S.A.
Top organization / ISP
Nowo · NOWO COMMUNICATIONS, S.A.
Top geo
Portugal · Viseu · Lamego
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

181.224.50.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
181.224.50.0
Broadcast
181.224.50.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
-1.302 , -46.3208
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS271496 · BNET RIO PROVEDOR DE ACESSO A INTERNET LTDA
Top organization / ISP
Edivaldo Santos Consultoria E Tecnologia EM ISP · Bnet RIO Provedor De Acesso A Internet Ltda
Top geo
Brazil · Pará · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

213.22.17.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
213.22.17.0
Broadcast
213.22.17.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
TVCABO-Portugal · NOS Comunicacoes S.A.
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

213.22.21.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
213.22.21.0
Broadcast
213.22.21.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
TVCABO-Portugal · NOS Comunicacoes S.A.
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

83.132.107.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
83.132.107.0
Broadcast
83.132.107.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.7418 , -7.73285
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
NOS Comunicacoes S.A. · NOS COMUNICACOES S.A
Top geo
Portugal · Viseu · Sátão
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

94.132.191.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
94.132.191.0
Broadcast
94.132.191.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.6642 , -7.9072
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
TVCABO-Portugal · NOS Comunicacoes S.A.
Top geo
Portugal · Viseu · Viseu
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →

94.133.207.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
94.133.207.0
Broadcast
94.133.207.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
40.7109 , -7.91445
Hits / Errors
1 hits · 0 errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS2860 · NOS COMUNICACOES, S.A.
Top organization / ISP
NOS Comunicacoes S.A. · NOS COMUNICACOES S.A
Top geo
Portugal · Viseu · Campo
Window / Updated
2026-02-23 → 2026-03-02 · Updated 2026-03-03 · v2
Open report →