83.135.184.56
83.135.184.56 is an IPv4 address operated by 1&1 Versatel GmbH (AS8881), geolocated to Berlin, Germany. Its reverse DNS name is i5387B838.versanet.de. As of October 6, 2026, IPDebrief rates it Moderate Risk (40/100); no anonymizing service was detected.
# INTELLIGENCE BRIEFING: IP 83.135.184.56/32
Classification: Moderate Risk | Date: 2026-07-24 | Status: Active
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## EXECUTIVE SUMMARY
IP 83.135.184.56 is a customer endpoint within the 1&1 Versatel GmbH network infrastructure (ASN 8881, 83.135.184.0/21). The address presents a moderate risk profile with current threat indicators but lacks active malicious activity. No open services are detected; the host appears firewalled.
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## OWNERSHIP AND GEOGRAPHY
| Attribute | Value |
|---|---|
| Organization | 1&1 Versatel GmbH |
| Network Name | VT-Customer-POOL |
| ASN | 8881 |
| CIDR Block | 83.135.184.0/21 |
| Country | Germany (DE) |
| Region | North Rhine-Westphalia |
| City | Berlin |
Geolocation data shows consensus across 3 sources with DNSSEC validation enabled.
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## THREAT ASSESSMENT
Current Risk Score: 40 (Moderate)
Threat Indicators:
- DNSBL Listings: 2 of 8 total blacklists
- DNSBL Severity: High
- Is Tor Exit: No
- Is Known Attacker: No
- Is Spam Source: No
- Active Threat Campaigns: None detected
Services: No open ports detected. Network role classified as "Firewalled / No Services."
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## OBSERVATION HISTORY
Signal observation history contains 16 recorded observations. Recent activity (2026-07-24) indicates:
- DNSBL Listings: Confirmed presence on 2 blacklists with high severity classification
- Ownership Stability: No ownership changes detected
- Threat Persistence: 0 days of persistent malicious activity
- Operator Score: 0.2609 (Basic classification)
- Malicious Classification: Not persistently malicious
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## NETWORK RELATIONSHIPS
The IP maintains associations within the Versatel customer network:
- DNS Association: i5387B838.versanet.de (versanet.de)
- Network Association: VT-Customer-POOL (83.135.184.0/21)
No cross-organizational or campaign-level correlations detected.
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## NEIGHBORHOOD ANALYSIS
Subnet: 83.135.184.0/24
| Metric | Value |
|---|---|
| Total Siblings | 3 |
| Abuse Density | 0 |
| High Risk Siblings | 0 |
| Medium Risk Siblings | 0 |
| Low Risk Siblings | 3 |
Sibling IP Risk Scores:
- 83.135.184.20: Risk 0
- 83.135.184.67: Risk 15
- 83.135.184.81: Risk 0
The /24 subnet demonstrates low abuse density with no high-risk neighbors.
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## OPERATIONAL CONTEXT
- Connection Type: Residential/Enterprise
- Infrastructure Type: Not CDN, Cloud, VPN, or Proxy
- Network Stability: BGP prefix stable with 0 route changes in 30 days
- Reverse DNS: i5387B838.versanet.de (confirmed)
- Email Authentication: SPF record present; DMARC not configured
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## RECOMMENDATIONS
Action Priority: Monitor
1. Allow List Evaluation: Current risk profile supports allow-listing for business traffic, pending verification of legitimate use case
2. DNSBL Investigation: Investigate root cause of 2 DNSBL listings if outbound mail flow is expected
3. Traffic Baseline: Establish normal traffic patterns for this endpoint; no open services detected
4. Continued Monitoring: Monitor for escalation to medium or high risk thresholds
---
END OF BRIEFING
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | 1&1 Versatel GmbH |
| ASN | AS8881 |
| Network Name | VT-Customer-POOL |
| CIDR Block | 83.135.184.0/21 |
| RIR | RIPE |
| Country | DE |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | i5387B838.versanet.de |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | i5387B838.versanet.de |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 2/2 domains |
| DMARC | 0/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS8881 |
| Network Prefix | 83.135.184.0/21 |
| Route mapping | Found |
🎯 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 | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 0% | 0 | 0 |
| Overall | 16% | 4 | 5 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-07 06:28:17 UTC |
| Last Seen | 2026-10-06 04:47:51 UTC |
| Profile Built | 2026-10-06 04:48:44 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 83.135.184.56
Who owns the IP address 83.135.184.56?
83.135.184.56 is registered to 1&1 Versatel GmbH. The address falls within the 83.135.184.0/21 network block. Registration is held at RIPE.
Where is 83.135.184.56 located?
Geolocation data places 83.135.184.56 in Berlin, North Rhine-Westphalia, Germany. The local time zone is Europe/Berlin. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 83.135.184.56 malicious or safe?
83.135.184.56 currently carries a moderate risk assessment, meaning some indicators warrant caution, but the evidence is mixed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 83.135.184.56?
The reverse DNS (PTR) record for 83.135.184.56 is i5387B838.versanet.de. This hostname is forward-confirmed, meaning it resolves back to the same address.