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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: CenturyLinks · Clear
Snapshot 2026-01-21 Results 8 Page 1 / 1

31.204.9.0/24

Risk Max — LOW Footprint 0.781% Hits 3
Prefix / IP version
/24 · IPv4
Network
31.204.9.0
Broadcast
31.204.9.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
3 hits · 1 errors
First / Last seen
2025-10-11 19:26 · 2025-10-11 19:33
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-10-06 → 2025-10-13 · Updated 2026-01-14 · v2
Open report →

31.204.15.0/24

Risk Max — LOW Footprint 0.781% Hits 3
Prefix / IP version
/24 · IPv4
Network
31.204.15.0
Broadcast
31.204.15.255
Observed IPs / Subnet size
2 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
3 hits · 0 errors
First / Last seen
2025-09-16 17:40 · 2025-09-20 08:25
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-09-15 → 2025-09-22 · Updated 2026-01-14 · v2
Open report →

31.204.14.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
31.204.14.0
Broadcast
31.204.14.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-10-04 03:14 · 2025-10-04 03:14
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-09-29 → 2025-10-06 · Updated 2026-01-14 · v2
Open report →

31.204.10.0/24

Risk Max — LOW Footprint 0.391% Hits 2
Prefix / IP version
/24 · IPv4
Network
31.204.10.0
Broadcast
31.204.10.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
2 hits · 0 errors
First / Last seen
2025-09-14 17:48 · 2025-09-14 17:48
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-09-08 → 2025-09-15 · Updated 2026-01-14 · v2
Open report →

31.204.13.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
31.204.13.0
Broadcast
31.204.13.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-10-11 10:57 · 2025-10-11 10:57
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-10-06 → 2025-10-13 · Updated 2026-01-14 · v2
Open report →

31.204.12.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
31.204.12.0
Broadcast
31.204.12.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-10-04 06:45 · 2025-10-04 06:45
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-09-29 → 2025-10-06 · Updated 2026-01-14 · v2
Open report →

31.204.11.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
31.204.11.0
Broadcast
31.204.11.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
1 hits · 0 errors
First / Last seen
2025-09-20 08:07 · 2025-09-20 08:07
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-09-15 → 2025-09-22 · Updated 2026-01-14 · v2
Open report →

31.204.8.0/24

Risk Max — LOW Footprint 0.391% Hits 1
Prefix / IP version
/24 · IPv4
Network
31.204.8.0
Broadcast
31.204.8.255
Observed IPs / Subnet size
1 observed · 256 total
Centroid
39.0437 , -77.4874
Hits / Errors
1 hits · 1 errors
First / Last seen
2025-04-15 02:35 · 2025-04-15 02:35
Top ASN
AS3356 · Level 3 Parent, LLC
Top organization / ISP
CenturyLinks · LEVEL3
Top geo
United States · Virginia · Ashburn
Window / Updated
2025-04-14 → 2025-04-21 · Updated 2026-01-14 · v2
Open report →