IP Intelligence Briefing: 104.42.191.43
Date: 2026-06-09
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**1. Core Profile**
- Risk Score: Low Risk (25/100) | No threat indicators detected.
- Ownership: Microsoft Corporation (ASN 8075, ARIN-registed).
- Geolocation: San Francisco, CA, US (37.78°N, -122.42°W).
- Network Role: Microsoft Azure cloud infrastructure (firewalled, no open services).
- Threat Status: No malicious activity, spam, or attacker associations.
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**2. Observation History**
- Signal Trends:
- Minimal risk score (0.13) with no persistent malicious behavior.
- 18 observations over 30 days, with 1 DNSBL listing (likely false positive).
- No changes in geolocation, DNS, or network behavior.
- Key Findings:
- Stable infrastructure with no scans, enumeration, or WAF violations.
- No correlation with known campaigns or honeypot activity.
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**3. Relationships**
- Linked Entities:
- Same network as Microsoft (MSFT) infrastructure.
- No subnets, hostnames, or certificates associated.
- Implications:
- IP is part of Microsoftβs Azure ecosystem; no external malicious connections.
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**4. Neighborhood Analysis**
- Subnet: 104.42.191.43/24.
- Abuse Density: 0% (clean subnet).
- Neighbors: No active or risky sibling IPs detected.
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**5. Recommendations**
- Monitoring: No immediate action required.
- Firewall: No rules needed; IP is benign.
- Context: Microsoft-owned infrastructure with no threat indicators.
Conclusion: 104.42.191.43 is a legitimate Microsoft Azure IP with no malicious activity. No further action required.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
π’ Ownership & Registration
| Organization | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | β |
| CIDR Block | β |
| RIR | ARIN |
| Country | β |
| Abuse Contact | Available via RDAP |
π DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No β PTR hostname does not resolve back to this IP (weak signal) |
π DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
βοΈ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Web Server |
| Network Tier | Hosting β Infrastructure provider without advanced routing |
π Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | β |
| 443 | https | tcp | β |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | Microsoft-IIS/10.0 |
| HTTP Title | β |
π TLS Certificate
CN=*.mailaletter.com was found on this IP. This may indicate a previously hosted website, a decommissioned service, or stale infrastructure.| SANs | *.mailaletter.commailaletter.com |
| Valid From | 2025-06-03T00:00:00+00:00 |
| Valid Until | 2026-06-03T23:59:59+00:00 (expired) |
| TLS Protocol | Tls12 |
| Cipher Suite | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 |
| Signature Algorithm | sha384RSA |
| Validity Period | 365 days |
| Serial Number | 128D6D98098FD9B31F0C6FDFE5641731 |
| Thumbprint | 34B95B1B7F802EE167081E102013B83E96ABB502 |
π― Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 33% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 30% | 2 | 3 |
| ownership | 20% | 2 | 3 |
| reputation | 28% | 1 | 3 |
| geolocation | 33% | 2 | 3 |
| Overall | 25% | 10 | 17 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
π Observation Timeline π Live
| First Seen | 2026-05-20 17:46:32 UTC |
| Last Seen | 2026-06-28 12:04:58 UTC |
| Profile Built | 2026-06-29 06:09:07 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 25 |
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