ASN Threat Analysis

ASNs Observed

188

Malicious IPs (ASN-mapped)

546

IPs Needing ASN

534.1K

Just Resolved

0

Resolve ASN & Abuse Contacts

Fastest path: load the WhoisXML IP Netblocks and resolve ASN/org/country locally (millions/sec, no API). Then pull abuse contacts for every ASN from RIPEstat. 69 ASN abuse contacts cached.

▶ Resolve ASN from local data ▶ Resolve abuse contacts (RIPEstat) Resolve 50 via ipinfo (needs outbound) ↻ Recompute ranking Export abuse contacts (CSV)

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Worst ASNs by Targeting Priority

Priority = malicious IP count × average threat. High-priority ASNs concentrate the most malicious infrastructure — the best candidates for block-listing at the network level or coordinated takedown.

ASN Threat Ranking (Top 40)

RankASNOrganizationAbuse ContactMalicious IPsAvg ThreatDominant ActivityPriorityAction
1 AS4134 China Telecom anti-spam@chinatelecom.cn 44 0.50 Other Malicious IPs · Block
2 AS16509 Amazon abuse@amazonaws.com 28 0.50 Other Malicious IPs · Block
3 AS61317 19 0.50 Other Malicious IPs · Block
4 AS13335 Cloudflare abuse@cloudflare.com 17 0.50 Other Malicious IPs · Block
5 AS14618 Amazon abuse@amazonaws.com 15 0.50 Other Malicious IPs · Block
6 AS16276 OVH abuse@ovh.net 13 0.50 Other Malicious IPs · Block
7 AS29465 13 0.50 Other Malicious IPs · Block
8 AS6939 13 0.50 Other Malicious IPs · Block
9 AS396982 Google network-abuse@google.com 12 0.50 Other Malicious IPs · Block
10 AS213412 11 0.50 Other Malicious IPs · Block
11 AS398324 11 0.50 Other Malicious IPs · Block
12 AS396507 10 0.50 Other Malicious IPs · Block
13 AS4766 9 0.50 Other Malicious IPs · Block
14 AS25369 8 0.50 Other Malicious IPs · Block
15 AS55286 8 0.50 Other Malicious IPs · Block
16 AS60729 8 0.50 Other Malicious IPs · Block
17 AS150436 7 0.50 Other Malicious IPs · Block
18 AS215125 7 0.50 Other Malicious IPs · Block
19 AS48090 7 0.50 Other Malicious IPs · Block
20 AS9498 7 0.50 Other Malicious IPs · Block
21 AS219502 6 0.50 Other Malicious IPs · Block
22 AS57558 6 0.50 Other Malicious IPs · Block
23 AS59651 6 0.50 Other Malicious IPs · Block
24 AS8075 Microsoft abuse@microsoft.com 6 0.50 Other Malicious IPs · Block
25 AS135377 5 0.50 Other Malicious IPs · Block
26 AS206092 Ip Volume abuse@ipvolume.net 5 0.50 Other Malicious IPs · Block
27 AS24309 5 0.50 Other Malicious IPs · Block
28 AS38365 5 0.50 Other Malicious IPs · Block
29 AS398722 5 0.50 Other Malicious IPs · Block
30 AS14061 DigitalOcean abuse@digitalocean.com 4 0.50 Other Malicious IPs · Block
31 AS215778 4 0.50 Other Malicious IPs · Block
32 AS396190 4 0.50 Other Malicious IPs · Block
33 AS45271 4 0.50 Other Malicious IPs · Block
34 AS47890 4 0.50 Other Malicious IPs · Block
35 AS197170 3 0.50 Other Malicious IPs · Block
36 AS198093 3 0.50 Other Malicious IPs · Block
37 AS200651 3 0.50 Other Malicious IPs · Block
38 AS209334 3 0.50 Other Malicious IPs · Block
39 AS210558 3 0.50 Other Malicious IPs · Block
40 AS211680 3 0.50 Other Malicious IPs · Block

Targeting Recommendations

  • AS4134 (China Telecom) is your #1 target — 44 malicious IPs concentrated here.
  • 12 ASNs carry 10+ malicious IPs each — network-level blocking of these gives the highest coverage-per-rule.
  • For coordinated takedown, start with high-priority ASNs whose dominant activity is Ransomware or C2 / APT — the highest-impact classes.
  • Use the Takedown Ops tool to pull abuse contacts for the network operators above.
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