139.91.1.1
Intelligence assessment for 139.91.1.1 classified the address as Low Risk with a risk score of 25. DNS resolution confirmed the PTR hostname grdns.ics.forth.gr within the forth.gr domain. Control plane data associated the address with Origin ASN 8522 and the BGP prefix 139.91.0.0/16. Threat detection identified one listing on DNS blacklists across a total of eight lists. Network role assessment determined the service purpose as Firewalled / No Services, with zero open ports. Behavioral analysis recorded no honeypot hits, enumeration strikes, or incidents. The profile confidence was rated Very Low, and the operational recommendation was to Monitor with low severity due to the presence of low-grade risk indicators.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Demos Panagopoulos |
| ASN | AS8522 |
| Network Name | FORTH |
| CIDR Block | 139.91.0.0/16 |
| RIR | ARIN |
| Country | GR |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | grdns.ics.forth.gr |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | grdns.ics.forth.gr |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Present |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 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 | — |
| 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 | 2026-09-17 02:25:36 UTC |
| Last Seen | 2026-09-17 02:25:36 UTC |
| Profile Built | 2026-09-17 02:40:36 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 22 |
Full dossier details are available via our API.