153.5.81.140
153.5.81.140 is an IPv4 address operated by Avgust Jauk (AS2107), geolocated to London, United Kingdom. Its reverse DNS name is b.dns.si. As of November 2, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Organization | Avgust Jauk |
| ASN | AS2107 |
| Network Name | ARNES |
| CIDR Block | 153.5.0.0/16 |
| RIR | APNIC |
| Country | SI |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | b.dns.si |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | b.dns.si |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS2107 |
| Network Prefix | 153.5.0.0/16 |
| 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 | 25% | 1 | 1 |
| Overall | 20% | 5 | 6 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-15 11:48:53 UTC |
| Last Seen | 2026-11-02 08:52:33 UTC |
| Profile Built | 2026-11-02 08:55:40 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 24 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 153.5.81.140
Who owns the IP address 153.5.81.140?
153.5.81.140 is registered to Avgust Jauk. The address falls within the 153.5.0.0/16 network block. Registration is held at APNIC.
Where is 153.5.81.140 located?
Geolocation data places 153.5.81.140 in London, Ljubljana, United Kingdom. The local time zone is Europe/London. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 153.5.81.140 malicious or safe?
153.5.81.140 currently carries a high risk assessment, meaning indicators associated with malicious or abusive activity have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 153.5.81.140?
The reverse DNS (PTR) record for 153.5.81.140 is b.dns.si. This hostname is forward-confirmed, meaning it resolves back to the same address.