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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: City of Boston · Clear
Snapshot 2026-01-24 Results 2 Page 1 / 1

216.163.221.0/24

Risk Max — LOW Footprint 0.391% Hits 68
Prefix / IP version
/24 · IPv4
Network
216.163.221.0
Broadcast
216.163.221.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
42.2904 , -71.0712
Hits / Errors
68 hits · 0 errors
First / Last seen
2025-05-21 16:47 · 2025-05-21 16:48
Top ASN
AS27370 · City of Boston
Top organization / ISP
Boston Public Schools · City of Boston
Top geo
United States · Massachusetts · Boston
Window / Updated
2025-05-19 → 2025-05-26 · Updated 2026-01-14 · v2
Open report →

216.163.213.0/24

Risk Max — LOW Footprint 0.391% Hits 17
Prefix / IP version
/24 · IPv4
Network
216.163.213.0
Broadcast
216.163.213.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
42.2904 , -71.0712
Hits / Errors
17 hits · 1 errors
First / Last seen
2025-01-21 15:28 · 2025-01-21 16:26
Top ASN
AS27370 · City of Boston
Top organization / ISP
Boston Public Schools · City of Boston
Top geo
United States · Massachusetts · Boston
Window / Updated
2025-01-20 → 2025-01-27 · Updated 2026-01-14 · v2
Open report →