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.
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Active filter:
CST
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Snapshot
2026-03-05
Results
19
Page
1
/
1
131.72.144.0/24
Risk Max
—
LOW
Footprint
2.344
%
Hits
10
Prefix / IP version
/24 · IPv4
Network
131.72.144.0
Broadcast
131.72.144.255
Observed IPs / Subnet size
6
observed ·
256
total
Centroid
-26.9981 , -48.618700000000004
Hits / Errors
10
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-02-27 02:00
Top ASN
AS28670 ·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top organization / ISP
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA
·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top geo
Brazil
·
Santa Catarina
·
Balneário Camboriú
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
143.255.185.0/24
Risk Max
—
LOW
Footprint
1.562
%
Hits
6
Prefix / IP version
/24 · IPv4
Network
143.255.185.0
Broadcast
143.255.185.255
Observed IPs / Subnet size
4
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
6
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-03-02 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
45.238.136.0/24
Risk Max
—
LOW
Footprint
1.562
%
Hits
5
Prefix / IP version
/24 · IPv4
Network
45.238.136.0
Broadcast
45.238.136.255
Observed IPs / Subnet size
4
observed ·
256
total
Centroid
-30.040299999999995 , -52.8972
Hits / Errors
5
hits ·
0
errors
First / Last seen
2026-02-23 02:00 · 2026-02-28 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
143.255.187.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
7
Prefix / IP version
/24 · IPv4
Network
143.255.187.0
Broadcast
143.255.187.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
7
hits ·
0
errors
First / Last seen
2026-02-25 02:00 · 2026-02-28 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
45.238.137.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
5
Prefix / IP version
/24 · IPv4
Network
45.238.137.0
Broadcast
45.238.137.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-30.040299999999995 , -52.8972
Hits / Errors
5
hits ·
0
errors
First / Last seen
2026-02-23 02:00 · 2026-03-02 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
177.84.148.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
5
Prefix / IP version
/24 · IPv4
Network
177.84.148.0
Broadcast
177.84.148.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-30.040299999999995 , -52.8972
Hits / Errors
5
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-03-01 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
143.255.184.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
4
Prefix / IP version
/24 · IPv4
Network
143.255.184.0
Broadcast
143.255.184.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
4
hits ·
0
errors
First / Last seen
2026-02-25 02:00 · 2026-03-01 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
45.236.123.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
3
Prefix / IP version
/24 · IPv4
Network
45.236.123.0
Broadcast
45.236.123.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-23.6446 , -48.12969999999999
Hits / Errors
3
hits ·
0
errors
First / Last seen
2026-02-27 02:00 · 2026-02-28 02:00
Top ASN
AS268317 ·
CSTELECOM SERVICOS LTDA
Top organization / ISP
Cstelecom Servicos Ltda
·
Cstelecom Servicos Ltda
Top geo
Brazil
·
São Paulo
·
Itapetininga
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
177.84.151.0/24
Risk Max
—
LOW
Footprint
1.172
%
Hits
3
Prefix / IP version
/24 · IPv4
Network
177.84.151.0
Broadcast
177.84.151.255
Observed IPs / Subnet size
3
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
3
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-02-27 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
138.94.220.0/24
Risk Max
—
LOW
Footprint
0.781
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
138.94.220.0
Broadcast
138.94.220.255
Observed IPs / Subnet size
2
observed ·
256
total
Centroid
-26.9927 , -48.623149999999995
Hits / Errors
2
hits ·
0
errors
First / Last seen
2026-02-23 02:00 · 2026-02-26 02:00
Top ASN
AS28670 ·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top organization / ISP
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA
·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top geo
Brazil
·
Santa Catarina
·
Balneário Camboriú
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
143.255.186.0/24
Risk Max
—
LOW
Footprint
0.781
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
143.255.186.0
Broadcast
143.255.186.255
Observed IPs / Subnet size
2
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
2
hits ·
1
errors
First / Last seen
2026-02-22 02:00 · 2026-02-25 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
177.84.150.0/24
Risk Max
—
LOW
Footprint
0.781
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
177.84.150.0
Broadcast
177.84.150.255
Observed IPs / Subnet size
2
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
2
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-02-24 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
72.56.145.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
4
Prefix / IP version
/24 · IPv4
Network
72.56.145.0
Broadcast
72.56.145.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
55.7487 , 37.6187
Hits / Errors
4
hits ·
1
errors
First / Last seen
2026-02-28 02:00 · 2026-03-01 02:00
Top ASN
AS209372 ·
WS Telecom Inc
Top organization / ISP
Cstmrs
·
WS Telecom Inc
Top geo
Russia
·
Moscow
·
Moscow
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
177.84.145.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
3
Prefix / IP version
/24 · IPv4
Network
177.84.145.0
Broadcast
177.84.145.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
3
hits ·
0
errors
First / Last seen
2026-02-23 02:00 · 2026-02-24 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
189.8.102.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
189.8.102.0
Broadcast
189.8.102.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
-26.9981 , -48.6187
Hits / Errors
2
hits ·
0
errors
First / Last seen
2026-02-26 02:00 · 2026-02-27 02:00
Top ASN
AS28670 ·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top organization / ISP
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA
·
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA.
Top geo
Brazil
·
Santa Catarina
·
Balneário Camboriú
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
131.72.147.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
131.72.147.0
Broadcast
131.72.147.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
-25.5026 , -49.2908
Hits / Errors
2
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS272212 ·
ILUMINET INTERNET
Top organization / ISP
CST SERVIÇOS DE INFORMÁTICA E CALL CENTER LTDA
·
Iluminet Internet
Top geo
Brazil
·
Paraná
·
Curitiba
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
45.238.138.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
45.238.138.0
Broadcast
45.238.138.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
-30.0403 , -52.8972
Hits / Errors
1
hits ·
0
errors
First / Last seen
2026-02-27 02:00 · 2026-02-28 02:00
Top ASN
AS262587 ·
CST - Cerentini Soluções em Tecnologia
Top organization / ISP
CST - Cerentini Soluções em Tecnologia
·
CST - Cerentini Soluções em Tecnologia
Top geo
Brazil
·
Rio Grande do Sul
·
Cachoeira do Sul
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
197.159.182.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
197.159.182.0
Broadcast
197.159.182.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
0.3417 , 6.7286
Hits / Errors
1
hits ·
0
errors
First / Last seen
2026-02-25 02:00 · 2026-02-26 02:00
Top ASN
AS328191 ·
Companhia Santomense de Telecomunicacoes
Top organization / ISP
— ·
CST
Top geo
São Tomé and Príncipe
·
Agua Grande
·
São Tomé
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
197.159.177.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
197.159.177.0
Broadcast
197.159.177.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
0.3417 , 6.7286
Hits / Errors
1
hits ·
0
errors
First / Last seen
2026-02-22 02:00 · 2026-02-23 02:00
Top ASN
AS328191 ·
Companhia Santomense de Telecomunicacoes
Top organization / ISP
— ·
CST
Top geo
São Tomé and Príncipe
·
Agua Grande
·
São Tomé
Window / Updated
2026-02-23 → 2026-03-02 · Updated
2026-03-03
· v2
Open report →
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