31.151.38.142
31.151.38.142 is an IPv4 address operated by TNF-AS - Vodafone Libertel B.V., NL (AS33915), with approximate network location Amsterdam, Netherlands. It belongs to a mobile network with reverse DNS name 31-151-38-142.dynamic.upc.nl. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | VODAFONEZIGGO IP AUTHORITY |
| ASN | AS33915 |
| Network Name | ZIGGO-B2C |
| CIDR Block | 31.151.0.0/18 |
| RIR | RIPE |
| Network registration country | NL |
| Routing operator | TNF-AS - Vodafone Libertel B.V., NL |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 31-151-38-142.dynamic.upc.nl |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | 31-151-38-142.dynamic.upc.nl |
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.
| caa | Present / verified upc.nl |
| spf | Unknown / lookup inconclusive 31-151-38-142.dynamic.upc.nl |
| dmarc | Unknown / lookup inconclusive _dmarc.31-151-38-142.dynamic.upc.nl |
| dnssec | Unknown / lookup inconclusive 142.38.151.31.in-addr.arpa |
| fcrDns | Unknown / lookup inconclusive 31-151-38-142.dynamic.upc.nl |
☁️ Network Classification
| Infrastructure | Mobile |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 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 | AS33915 |
| Network Prefix | 31.151.0.0/17 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 31% | 2 | 2 |
| routing | 20% | 1 | 1 |
| services | 20% | 1 | 1 |
| ownership | 40% | 2 | 3 |
| reputation | 0% | 0 | 0 |
| geolocation | 20% | 1 | 1 |
| Overall | 21% | 7 | 8 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-05 21:57:02 UTC |
| Last Seen | 2026-11-07 23:16:25 UTC |
| Profile Built | 2026-11-13 08:44:01 UTC |
| Data Freshness | Live |
| Signal Types | 15 |
| Total Observations | 21 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 31.151.38.142
Who owns the IP address 31.151.38.142?
31.151.38.142 is registered to VODAFONEZIGGO IP AUTHORITY. The address falls within the 31.151.0.0/18 network block. Registration is held at RIPE.
Where is 31.151.38.142 located?
Geolocation data places 31.151.38.142 in Amsterdam, North Holland, Netherlands. The local time zone is Europe/Amsterdam. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 31.151.38.142 malicious or safe?
31.151.38.142 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 31.151.38.142?
The reverse DNS (PTR) record for 31.151.38.142 is 31-151-38-142.dynamic.upc.nl. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 31.151.38.142 a VPN, proxy, or data center address?
31.151.38.142 is classified as a mobile network based on network ownership and behavioural analysis.