3.101.172.137
3.101.172.137 is an IPv4 address operated by Amazon.com, Inc. (AS16509), geolocated to San Jose, United States. It belongs to datacenter or hosting infrastructure with reverse DNS name ec2-3-101-172-137.us-west-1.compute.amazonaws.com. As of October 27, 2026, IPDebrief rates it Low Risk (20/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Network Name | AMAZON-SFO |
| CIDR Block | 3.101.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | ec2-3-101-172-137.us-west-1.compute.amazonaws.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | ec2-3-101-172-137.us-west-1.compute.amazonaws.com |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 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 | AS16509 |
| Network Prefix | 3.101.0.0/16 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 25% | 1 | 2 |
| reputation | 25% | 1 | 1 |
| geolocation | 25% | 1 | 1 |
| Overall | 26% | 7 | 8 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-27 23:22:00 UTC |
| Last Seen | 2026-11-01 07:58:36 UTC |
| Profile Built | 2026-10-27 23:41:07 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 21 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 3.101.172.137
Who owns the IP address 3.101.172.137?
3.101.172.137 is registered to Amazon.com, Inc.. The address falls within the 3.101.0.0/16 network block. Registration is held at ARIN.
Where is 3.101.172.137 located?
Geolocation data places 3.101.172.137 in San Jose, CA, United States. The local time zone is America/Los_Angeles. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 3.101.172.137 malicious or safe?
3.101.172.137 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 3.101.172.137?
The reverse DNS (PTR) record for 3.101.172.137 is ec2-3-101-172-137.us-west-1.compute.amazonaws.com. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 3.101.172.137 a VPN, proxy, or data center address?
3.101.172.137 is classified as cloud infrastructure and hosting infrastructure based on network ownership and behavioural analysis.