IP Intelligence Briefing: 91.211.36.221
Date: 2026-06-08
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**1. Core Profile**
- Risk Assessment: Low Risk (Risk Score: 0/100). No active threats, abuse indicators, or malicious campaigns detected.
- Ownership: Registered to Nikolay Mamashin (Russia). No abuse contact details available via RDAP.
- Geolocation:
- Country: Russia (RU)
- Region: Krasnodar Krai
- City: Sochi
- Coordinates: Latitude 43.6, Longitude 39.73
- Network Role: Firewalled / No Services. No open ports, TLS certificates, or HTTP services detected.
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**2. Threat & Abuse Indicators**
- Threat Observations:
- No malware campaigns, spam, or known attacker activity linked to this IP.
- Zero blacklist entries or DNS-based attacks observed.
- DNS Security:
- SPF and DMARC records detected for domain sochi-online.com (valid, but no email authentication issues).
- DNS resolution errors (timed out) for internal hosts (e.g., 192.168.2.108), suggesting potential network misconfiguration or local resolver issues.
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**3. Network Relationships**
- Subnet: Part of 91.211.36.0/22 (SOCHI-ONLINE-NET), registered to Sochi-Online Ltd.
- Connected Entities:
- Linked to sochi-online.com (DNS association).
- No direct relationships to other IPs, organizations, or certificates.
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**4. Neighborhood Analysis**
- Subnet Abuse Density: 0% (no malicious activity detected in the 91.211.36.0/22 subnet).
- Neighbors: No active sibling IPs or threat-related neighbors identified.
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**5. Observation History**
- Recent Activity:
- Geolocation Inference: Detected in Sochi, Russia (June 8, 2026; 52% confidence).
- Threat Signals: Low-severity threat indicators (21 total observations) linked to network and DNS resolution.
- DNS Records: Valid SPF/DMArc for sochi-online.com, but no email abuse detected.
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**6. Recommendations**
- Monitoring: Track DNS resolution issues (timed-out queries) and verify network configuration for internal hosts.
- Geolocation: Confirm alignment with Sochi, Russia, given the ownerβs location.
- Network Segmentation: Ensure firewalled isolation of this IP, as no services are actively exposed.
Conclusion: 91.211.36.221 is a low-risk, non-malicious IP associated with a Russian entity. No immediate defensive action required, but DNS misconfigurations warrant investigation.
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*Generated by IPDebrief Threat Intelligence Platform*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
π’ Ownership & Registration
| Organization | Nikolay Mamashin |
| ASN | AS48498 |
| Network Name | β |
| CIDR Block | β |
| RIR | RIPE |
| Country | β |
| Abuse Contact | Available via RDAP |
π DNS Intelligence
| PTR | ip-91-211-36-221.net.sochi-online.com |
| Forward Confirmed | No β PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | ip-91-211-36-221.net.sochi-online.com |
π DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
βοΈ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown β Insufficient routing data to classify |
π 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 | β |
| HTTP Title | β |
π TLS Certificate
| SANs | None |
| Valid From | β |
| Valid Until | β |
π― Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 27% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 19% | 1 | 2 |
| ownership | 30% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 27% | 2 | 2 |
| Overall | 23% | 9 | 12 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
π Observation Timeline π Live
| First Seen | 2026-05-17 03:09:48 UTC |
| Last Seen | 2026-06-08 05:21:29 UTC |
| Profile Built | 2026-06-08 05:44:28 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 21 |
Full dossier details are available via our API.