IOC Radar
IPMediumSignal 43/100

216.73.216.203

Location
United StatesUnited States
Columbus, Ohio
ASN
AS16509
Anthropic, PBC
First Seen
May 23, 2025
Last Seen
May 30, 2026
May 23
First Seen
387d ago
May 30
Last Seen
15d ago
8
Reports
source reports
43%
Confidence
medium
Found in 8 reports. Confidence: medium. · Confidence scores are heuristic. Verify before acting on results.
IPv4 Address
Network layer indicator observed in threat reports.
MISP Category
Network Activity
Confidence
43%
Signal Score
43 / 100
IDS Rule
No
Threat Context
Tags
MITRE ATT&CK

MITRE ATT&CK TTPs

3 techniques

Network Information

CountryUSUnited States
RegionColumbus, Ohio
ASNAS16509
OrganizationAnthropic, PBC

Feed Intelligence Summary

8 reports43% confidence
8
Source reports
43%
Confidence score
Category tags
abuseactive scanafricaantispamargentinaasiaaustraliaaustriaauto-blockedbad reputationbad web botbangladeshbelgiumbotnet activitybrazilbrute forcebrute-forcecanadachinaddosddos attackencryptioneuropeeurope/asiaexploitation activityfinlandfrancegermanyhackinghong kongindiaindicatorirelanditalyjapankenyakorea, republic ofkyrgyzstanlithuanialog4jmexicomorocconetherlandsnetworknew zealandnorth americanorwayoceaniapolandresearchedromaniarussiascannerserbiasingaporesouth africasouth americaspamssl-enrichmentswedent1071.001t1105t1573.002taiwanthreat-intelukraineunited kingdomunited statesusvenezuela, bolivarian republic ofweb app attackweb spam

Activity Timeline

1 total obs
May 30May 30

Threat Activity Heatmap

· Peak: 2026-05-30
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24h
0
Dormant
7d
0
Dormant
30d
1
Minimal
3mo
1
Minimal
Intelligence SummaryAI Generated

This Indicator of Compromise (IOC), an IPv4 address identified as 216.73.216.203, presents a significant potential threat to organizational security. Its presence within a network environment could indicate compromise, specifically involving malicious command and control (C2) communications or the staging of malicious tools for further attack. The high score of 43.43, coupled with its non-whitelisted status, underscores the elevated risk associated with this IP address. If left unaddressed, conn…

Threat ScoreMedium Risk
43
SIGNAL
Signal Score
43%
Confidence
8
Reports
First seenMay 23, 2025
Last seenMay 30, 2026
GeolocationUS
CountryUnited States
LocationColumbus, Ohio
ASNAS16509
OrgAnthropic, PBC
Coords39.9612, -82.9988

VirusTotal

Not checked

WHOIS

description
AbuseIPDB 24% | US | Anthropic, PBC
raw
Amazon.com, Inc. AMAZO-4 (NET-216-73-208-0-1) 216.73.208.0 - 216.73.219.255 Anthropic, PBC AWS-ANTHROPIC (NET-216-73-216-0-1) 216.73.216.0 - 216.73.219.255

Export & API

STIX 2.1 Bundle
CSV Export
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IOC Journey

medium
First detected 1 year ago · Last seen 15 days ago
Appeared in 8 threat reports