139.28.41.36
139.28.41.36 is an IPv4 address announced by AS47273, with approximate network location Krakow, Poland. Its reverse DNS name is 139-28-41-36.artus.net.pl. As of November 6, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Krzysztof Koczur |
| ASN | AS47273 |
| Network Name | PL-ARTUS-20181228 |
| CIDR Block | 139.28.40.0/22 |
| RIR | ARIN |
| Network registration country | PL |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 139-28-41-36.artus.net.pl |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | 139-28-41-36.artus.net.pl |
DNS Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP. DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| spf | Not checked |
| dmarc | Not checked |
| fcrDns | Not checked |
| dnssec | Not checked |
| caa | Not checked |
☁️ 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS47273 |
| Network Prefix | 139.28.40.0/22 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 43% | 2 | 3 |
| routing | 20% | 1 | 1 |
| services | 28% | 2 | 2 |
| ownership | 50% | 2 | 3 |
| reputation | 22% | 1 | 2 |
| geolocation | 28% | 2 | 2 |
| Overall | 31% | 10 | 13 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-04 08:03:43 UTC |
| Last Seen | 2026-11-06 02:56:58 UTC |
| Profile Built | 2026-11-06 03:36:17 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 19 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 139.28.41.36
Who owns the IP address 139.28.41.36?
139.28.41.36 is registered to Krzysztof Koczur. The address falls within the 139.28.40.0/22 network block. Registration is held at ARIN.
Where is 139.28.41.36 located?
Geolocation data places 139.28.41.36 in Krakow, Lesser Poland, Poland. The local time zone is Europe/Warsaw. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 139.28.41.36 malicious or safe?
139.28.41.36 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 139.28.41.36?
The reverse DNS (PTR) record for 139.28.41.36 is 139-28-41-36.artus.net.pl. This hostname is forward-confirmed, meaning it resolves back to the same address.