3.5.78.57
3.5.78.57 is an IPv4 address operated by Amazon Data Services Northern Virginia (AS16509), geolocated to Portland, United States. Its reverse DNS name is s3-w.us-west-2.amazonaws.com. As of November 2, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.
IP address 3.5.78.57 was assigned to AS16509 (Amazon Data Services Northern Virginia) within the AMAZON-S3 network block. Ownership records showed the endpoint functioned as a Web Server hosting Amazon S3 infrastructure with open ports 80, 443, and 8080. The address maintained a Low Risk status with a risk score of 25.
No known attacker indicators or blacklist hits were present, though the threat actor profile was classified as a Suspicious Host. Neighborhood data indicated a mostly clean classification with an abuse density of 0.1818, but four threat siblings were detected within the subnet. A contradiction existed between the claimed Portland, OR geolocation and RTT physics measurements. The latest observation was recorded on 2026-10-23.
The recommended action was to Monitor the traffic at low severity.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Amazon Data Services Northern Virginia |
| ASN | AS16509 |
| Network Name | AMAZON-S3 |
| CIDR Block | 3.5.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | s3-w.us-west-2.amazonaws.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | s3-w.us-west-2.amazonaws.com |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| 8080 | http-alt | tcp | — |
| Closed Ports | 22, 25, 3389, 8443 (3 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | *.s3-us-west-2.amazonaws.com*.s3.amazonaws.coms3-control.us-west-2.amazonaws.com*.s3.dualstack.us-west-2.amazonaws.coms3-deprecated.us-west-2.amazonaws.com*.s3-deprecated.us-west-2.amazonaws.coms3-control.dualstack.us-west-2.amazonaws.coms3.amazonaws.coms3.dualstack.us-west-2.amazonaws.com*.s3-control.dualstack.us-west-2.amazonaws.com |
| Valid From | 2026-09-16T00:00:00+00:00 |
| Valid Until | 2027-04-01T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 197 days |
🛡️ Public Network Snapshot
| Origin ASN | AS16509 |
| Network Prefix | 3.5.78.0/24 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Not detected |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 40% | 2 | 3 |
| routing | 20% | 1 | 1 |
| services | 40% | 2 | 3 |
| ownership | 40% | 2 | 3 |
| reputation | 20% | 1 | 2 |
| geolocation | 40% | 2 | 3 |
| Overall | 33% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-21 10:42:21 UTC |
| Last Seen | 2026-11-02 08:34:49 UTC |
| Profile Built | 2026-11-02 08:59:10 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 81 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 3.5.78.57
Who owns the IP address 3.5.78.57?
3.5.78.57 is registered to Amazon Data Services Northern Virginia. The address falls within the 3.5.0.0/16 network block. Registration is held at ARIN.
Where is 3.5.78.57 located?
Geolocation data places 3.5.78.57 in Portland, OR, 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 3.5.78.57 malicious or safe?
3.5.78.57 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 3.5.78.57?
The reverse DNS (PTR) record for 3.5.78.57 is s3-w.us-west-2.amazonaws.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.
What ports are open on 3.5.78.57?
Responsive ports observed on 3.5.78.57 include 80, 443, 8080. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.