16.28.136.229
16.28.136.229 is an IPv4 address operated by Amazon Data Services South Africa (AS16509), geolocated to Cape Town, South Africa. Its reverse DNS name is ec2-16-28-136-229.af-south-1.compute.amazonaws.com. As of October 20, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.
The IP address 16.28.136.229 was classified as High Risk with a score of 70 and was assigned to Amazon Data Services South Africa (ASN 16509) within the 16.28.0.0/16 block. Geolocation data indicated Cape Town, South Africa, although source consensus was inconsistent with conflicting US data. The address resolved to ec2-16-28-136-229.af-south-1.compute.amazonaws.com and presented an SSL certificate for lms-aws-af-south-1.roblox.com on port 443 via nginx.
Threat analysis identified the infrastructure as part of a coordinated campaign, correlating with 15 other IP addresses and certificate subjects. Despite a lack of specific behavioral incidents, the risk assessment flagged the address with critical severity due to the high risk score and correlation with known campaign infrastructure. Operational guidance advised immediate firewall blocking to mitigate potential exposure. One DNS blacklist listing was detected among eight checks.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Amazon Data Services South Africa |
| ASN | AS16509 |
| Network Name | AMAZON-CPT |
| CIDR Block | 16.28.0.0/16 |
| RIR | ARIN |
| Country | South Africa |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | ec2-16-28-136-229.af-south-1.compute.amazonaws.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | ec2-16-28-136-229.af-south-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 | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 80, 3389, 8080, 8443 (1 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | lms-aws-af-south-1.roblox.com |
| Valid From | 2026-09-02T00:00:00+00:00 |
| Valid Until | 2027-03-18T23:59:59+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 | 16.28.0.0/16 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Enabled |
🎯 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 | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 16% | 4 | 4 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-17 04:28:12 UTC |
| Last Seen | 2026-10-17 04:28:12 UTC |
| Profile Built | 2026-10-20 04:45:26 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 23 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 16.28.136.229
Who owns the IP address 16.28.136.229?
16.28.136.229 is registered to Amazon Data Services South Africa. The address falls within the 16.28.0.0/16 network block. Registration is held at ARIN.
Where is 16.28.136.229 located?
Geolocation data places 16.28.136.229 in Cape Town, WC, South Africa. The local time zone is Africa/Johannesburg. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 16.28.136.229 malicious or safe?
16.28.136.229 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 16.28.136.229?
The reverse DNS (PTR) record for 16.28.136.229 is ec2-16-28-136-229.af-south-1.compute.amazonaws.com. This hostname is forward-confirmed, meaning it resolves back to the same address.
What ports are open on 16.28.136.229?
Responsive ports observed on 16.28.136.229 include 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.