18.139.168.123
18.139.168.123 is an IPv4 address operated by AMAZON-02 - Amazon.com, Inc., US (AS16509), with approximate network location Singapore, Singapore. It belongs to datacenter or hosting infrastructure with reverse DNS name ec2-18-139-168-123.ap-southeast-1.compute.amazonaws.com. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Amazon Data Services Singapore |
| ASN | AS16509 |
| Network Name | AMAZON-SIN |
| CIDR Block | 18.138.0.0/15 |
| RIR | ARIN |
| Network registration country | Singapore |
| Routing operator | AMAZON-02 - Amazon.com, Inc., US |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | ec2-18-139-168-123.ap-southeast-1.compute.amazonaws.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
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 | Not checked |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Not checked |
| fcrDns | Not checked |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 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 | 18.138.0.0/15 |
| Route mapping | Found |
| RPKI Status | Valid |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 27% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 20% | 2 | 3 |
| reputation | 22% | 1 | 3 |
| geolocation | 24% | 2 | 3 |
| Overall | 19% | 10 | 16 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Stale
| First Seen | 2026-07-02 04:21:16 UTC |
| Last Seen | 2026-10-07 10:57:15 UTC |
| Profile Built | 2026-11-13 09:52:19 UTC |
| Data Freshness | Stale |
| Signal Types | 27 |
| Total Observations | 28 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 18.139.168.123
Who owns the IP address 18.139.168.123?
18.139.168.123 is registered to Amazon Data Services Singapore. The address falls within the 18.138.0.0/15 network block. Registration is held at ARIN.
Where is 18.139.168.123 located?
Geolocation data places 18.139.168.123 in Singapore. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 18.139.168.123 malicious or safe?
18.139.168.123 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 18.139.168.123?
The reverse DNS (PTR) record for 18.139.168.123 is ec2-18-139-168-123.ap-southeast-1.compute.amazonaws.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.
Is 18.139.168.123 a VPN, proxy, or data center address?
18.139.168.123 is classified as cloud infrastructure based on network ownership and behavioural analysis.