5.173.176.37
IP Intelligence Briefing: 5.173.176.37/32
Date: 2026-06-13
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**1. Risk Profile**
- Overall Risk Score: 25 (Low Risk)
- Geolocation: Warsaw, Mazovia, Poland (PL)
- Network Role: Firewalled / No Services (no open ports, no TLS/HTTP services detected)
- Ownership: Unregistered (no ASN, organization, or abuse contact details)
- Threat Indicators: No known malicious activity, spam, or attacker associations.
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**2. Historical Activity**
- Observation Count: 11 signals recorded in the last 30 days.
- Key Trends:
- Stable risk profile with no significant changes.
- DNS records (PTR: `user-5-173-176-37.play-internet.pl`) show SPF validation but no DMARC.
- No evidence of scanning, enumeration, or WAF violations.
- Stability: BGP route stability flagged as unstable (likely due to limited route history).
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**3. Network Relationships**
- DNS Associations:
- Linked to `play-internet.pl` (hostname: `user-5-173-176-37.play-internet.pl`).
- No Subnet Connections:
- Neighbors tool returned 0 active IPs in the /24 subnet (`5.173.176.37/24`), suggesting sparse or incomplete data.
- Subnet abuse density: 0% (no malicious siblings detected).
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**4. Actionable Insights**
- Monitor DNS: Track DNS activity for `play-internet.pl` for anomalies (e.g., SPF/DMARC misconfigurations).
- Verify Ownership: Investigate missing ownership data (no ASN/org details) to confirm legitimacy.
- Subnet Context: The lack of neighboring IPs may indicate a low-traffic or private subnet; verify if the IP is residential or business.
- Firewall Rules: No immediate mitigation needed due to low risk, but consider blocking unsolicited traffic to the firewalled host.
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Conclusion:
The IP exhibits no active malicious behavior, but incomplete ownership data and sparse subnet activity warrant further investigation. SOC teams should monitor DNS and network changes while validating the IP’s legitimate use case.
Tools Used: `ipdebrief_profile`, `ipdebrief_history`, `ipdebrief_relationships`, `ipdebrief_neighbors`.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | P4-MNT |
| ASN | AS39603 |
| Network Name | PLAY_MBB |
| CIDR Block | 5.173.128.0/17 |
| RIR | RIPE |
| Country | PL |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | user-5-173-176-37.play-internet.pl |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | user-5-173-176-37.play-internet.pl |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 0% | 0 | 0 |
| Overall | 12% | 3 | 3 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-06-07 01:47:13 UTC |
| Last Seen | 2026-06-13 17:53:02 UTC |
| Profile Built | 2026-06-13 17:59:26 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 18 |
Full dossier details are available via our API.