IP Intelligence Briefing: 148.113.128.156
Date: June 9, 2026
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**1. Core Profile**
- Risk Score: Moderate (50/100)
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276) under CIDR 148.113.128.0/24.
- Geolocation: Confirmed as Canada (CA) with a broad accuracy radius (3000 km). City field is marked as "Singapore," which may indicate data inconsistency.
- Network Role: Cloud compute infrastructure (OVH-hosted), no public services detected.
- Threat Indicators: No malicious activity detected (no indicators, blacklists, or campaigns).
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**2. Observation History**
- Recent Trends:
- Abused network density in the subnet 148.113.128.0/24 is 47% (mixed classification: 119 threat IPs in 253 total).
- Geolocation data shows inconsistent "Canada" and "Singapore" origins, requiring further validation.
- Operator score is Basic (0.3478), indicating a legitimate network but with potential risks.
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**3. Relationships & DNS**
- Network Affiliation:
- Linked to OVH-CUST-281059693 (same subnet).
- DNS association with proxy-ca014-san156.ahrefs.net (Ahrefs infrastructure).
- Email & Security:
- No SPF/DKIM records detected; no email reputation data.
- DNSSEC and CAA records are present, suggesting basic security hygiene.
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**4. Subnet Neighbors**
- Subnet: 148.113.128.0/24 (253 IPs total).
- Risk Distribution:
- High risk: 0 IPs.
- Medium risk: 70 IPs (40โ60 risk score).
- Low risk: 30 IPs (25โ40 risk score).
- Notable Neighbors:
- IPs with risk scores โฅ40 are flagged, suggesting potential compromised systems in the subnet.
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**5. Actionable Insights**
- Monitor Subnet: The 148.113.128.0/24 subnet has a 47% abuse density, warranting closer scrutiny for lateral movement or command-and-control (C2) activity.
- Verify Geolocation: Discrepancies in geolocation data (Canada vs. Singapore) may indicate misconfiguration or spoofing.
- Block High-Risk Neighbors: Consider blocking neighboring IPs with โฅ40 risk scores to mitigate potential threats.
- Check DNS Behavior: Monitor traffic to proxy-ca014-san156.ahrefs.net for unusual patterns, as it is linked to this IP.
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**Conclusion**
The IP 148.113.128.156 is part of a legitimate cloud infrastructure managed by OVH for Ahrefs. While no direct malicious activity is detected, the associated subnet has a significant risk profile. SOC teams should prioritize monitoring the subnet for suspicious behavior and validate geolocation inconsistencies.
Recommended Next Steps:
1. Correlate subnet neighbor risks with internal logs.
2. Validate geolocation data with additional sources.
3. Implement firewall rules to restrict traffic to high-risk neighbors.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
๐ข Ownership & Registration
| Organization | Dmytro, Ahrefs Pte Ltd |
| ASN | AS16276 |
| Network Name | OVH-CUST-281059693 |
| CIDR Block | 148.113.128.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | โ |
๐ DNS Intelligence
| PTR | proxy-ca014-san156.ahrefs.net |
| Forward Confirmed | No โ PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca014-san156.ahrefs.net |
๐ DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
โ๏ธ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 โ Basic operator with some routing infrastructure |
๐ Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | โ |
| HTTP Title | โ |
๐ TLS Certificate
| SANs | None |
| Valid From | โ |
| Valid Until | โ |
๐ฏ Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 30% | 2 | 3 |
| routing | 19% | 2 | 2 |
| services | 12% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 22% | 1 | 2 |
| geolocation | 25% | 2 | 2 |
| Overall | 20% | 11 | 13 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (65%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
๐ Observation Timeline ๐ Live
| First Seen | 2026-05-22 03:08:30 UTC |
| Last Seen | 2026-06-28 17:03:05 UTC |
| Profile Built | 2026-06-29 05:07:34 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 24 |
Full dossier details are available via our API.