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.
Search
Active filter:
Waltham
·
Clear
Snapshot
2026-01-20
Results
12
Page
1
/
1
146.115.167.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
31
Prefix / IP version
/24 · IPv4
Network
146.115.167.0
Broadcast
146.115.167.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
31
hits ·
0
errors
First / Last seen
2025-03-16 02:44 · 2025-03-16 02:44
Top ASN
AS6079 ·
RCN
Top organization / ISP
RCN Corporation
·
RCN
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2025-03-10 → 2025-03-17 · Updated
2026-01-14
· v2
Open report →
38.100.114.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
30
Prefix / IP version
/24 · IPv4
Network
38.100.114.0
Broadcast
38.100.114.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
30
hits ·
2
errors
First / Last seen
2023-12-14 21:37 · 2023-12-14 21:37
Top ASN
AS174 ·
Cogent Communications, LLC
Top organization / ISP
Code 200, UAB
·
Cogent Communications
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2023-12-11 → 2023-12-18 · Updated
2026-01-14
· v2
Open report →
81.106.122.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
12
Prefix / IP version
/24 · IPv4
Network
81.106.122.0
Broadcast
81.106.122.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.5909 , -0.021500000000000002
Hits / Errors
12
hits ·
1
errors
First / Last seen
2024-10-01 10:11 · 2024-10-01 10:15
Top ASN
AS5089 ·
Virgin Media Limited
Top organization / ISP
— ·
Virgin Media
Top geo
United Kingdom
·
England
·
Walthamstow
Window / Updated
2024-09-30 → 2024-10-07 · Updated
2026-01-14
· v2
Open report →
188.221.86.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
12
Prefix / IP version
/24 · IPv4
Network
188.221.86.0
Broadcast
188.221.86.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.5909 , -0.021500000000000002
Hits / Errors
12
hits ·
1
errors
First / Last seen
2024-05-25 09:25 · 2024-05-25 09:26
Top ASN
AS5607 ·
Sky UK Limited
Top organization / ISP
Sky Broadband
·
Sky UK Limited
Top geo
United Kingdom
·
England
·
Walthamstow
Window / Updated
2024-05-20 → 2024-05-27 · Updated
2026-01-14
· v2
Open report →
154.50.139.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
3
Prefix / IP version
/24 · IPv4
Network
154.50.139.0
Broadcast
154.50.139.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
3
hits ·
2
errors
First / Last seen
2025-02-02 18:31 · 2025-02-02 18:31
Top ASN
AS174 ·
Cogent Communications, LLC
Top organization / ISP
Code 200, UAB
·
Cogent Communications
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2025-01-27 → 2025-02-03 · Updated
2026-01-14
· v2
Open report →
154.3.129.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
3
Prefix / IP version
/24 · IPv4
Network
154.3.129.0
Broadcast
154.3.129.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
3
hits ·
2
errors
First / Last seen
2025-01-26 22:28 · 2025-01-26 22:28
Top ASN
AS64249 ·
Charles River Operation
Top organization / ISP
Charles River Operation
·
Charles River Operation
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2025-01-20 → 2025-01-27 · Updated
2026-01-14
· v2
Open report →
86.133.51.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
2
Prefix / IP version
/24 · IPv4
Network
86.133.51.0
Broadcast
86.133.51.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.6881 , 0.0001
Hits / Errors
2
hits ·
2
errors
First / Last seen
2025-08-02 19:56 · 2025-08-02 19:56
Top ASN
AS2856 ·
British Telecommunications PLC
Top organization / ISP
— ·
BT Public Internet Service
Top geo
United Kingdom
·
England
·
Waltham Abbey
Window / Updated
2025-07-28 → 2025-08-04 · Updated
2026-01-14
· v2
Open report →
38.100.112.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
38.100.112.0
Broadcast
38.100.112.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
1
hits ·
0
errors
First / Last seen
2025-09-14 17:24 · 2025-09-14 17:24
Top ASN
AS174 ·
Cogent Communications, LLC
Top organization / ISP
Code 200, UAB
·
Cogent Communications
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2025-09-08 → 2025-09-15 · Updated
2026-01-14
· v2
Open report →
212.132.215.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
212.132.215.0
Broadcast
212.132.215.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.5909 , -0.0215
Hits / Errors
1
hits ·
1
errors
First / Last seen
2025-08-02 21:14 · 2025-08-02 21:14
Top ASN
AS201838 ·
Community Fibre Limited
Top organization / ISP
Maryhill High School
·
RM Education
Top geo
United Kingdom
·
England
·
Walthamstow
Window / Updated
2025-07-28 → 2025-08-04 · Updated
2026-01-14
· v2
Open report →
188.30.140.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
188.30.140.0
Broadcast
188.30.140.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.5909 , -0.0215
Hits / Errors
1
hits ·
1
errors
First / Last seen
2025-07-31 17:40 · 2025-07-31 17:40
Top ASN
AS206067 ·
Hutchison 3G UK Limited
Top organization / ISP
Mobile Broadband Service
·
Hutchison 3G UK Ltd
Top geo
United Kingdom
·
England
·
Walthamstow
Window / Updated
2025-07-28 → 2025-08-04 · Updated
2026-01-14
· v2
Open report →
188.30.133.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
188.30.133.0
Broadcast
188.30.133.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
51.5909 , -0.0215
Hits / Errors
1
hits ·
0
errors
First / Last seen
2025-05-05 00:52 · 2025-05-05 00:52
Top ASN
AS206067 ·
Hutchison 3G UK Limited
Top organization / ISP
Mobile Broadband Service
·
Hutchison 3G UK Ltd
Top geo
United Kingdom
·
England
·
Walthamstow
Window / Updated
2025-04-28 → 2025-05-05 · Updated
2026-01-14
· v2
Open report →
38.146.57.0/24
Risk Max
—
LOW
Footprint
0.391
%
Hits
1
Prefix / IP version
/24 · IPv4
Network
38.146.57.0
Broadcast
38.146.57.255
Observed IPs / Subnet size
1
observed ·
256
total
Centroid
42.366 , -71.2271
Hits / Errors
1
hits ·
0
errors
First / Last seen
2025-02-15 23:14 · 2025-02-15 23:14
Top ASN
AS174 ·
Cogent Communications, LLC
Top organization / ISP
Charles River Operation
·
Cogent Communications
Top geo
United States
·
Massachusetts
·
Waltham
Window / Updated
2025-02-10 → 2025-02-17 · Updated
2026-01-14
· v2
Open report →
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