100.51.163.213
100.51.163.213 is an IPv4 address operated by AMAZON-AES - Amazon.com, Inc., US (AS14618), with approximate network location Ashburn, United States. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
Witness AI IP Assessment (AI-generated)
AI-generated assessment. Verify critical details independently.
On 2026-01-25, IP address 100.51.163.213/32 was observed as an active host validated by the server. The address is assigned to Amazon Data Services Northern Virginia (AS14618) within the 100.48.0.0/12 block and resolves to a location in Ashburn, Virginia, United States. The network profile identifies the infrastructure as a Web Server operated by Amazon Web Services, though specific service categorization flags for CDN, VPN, proxy, Tor, hosting, mobile, or residential use remain unverified.
Network hygiene assessments for DNSSEC, SPF, DMARC, and CAA returned unknown or not-checked statuses, indicating no definitive evidence of poor configuration was collected during this assessment. A historical TLS probe retrieved a certificate issued by "CN=Amazon RSA 2048 M01, O=Amazon, C=US" for the subject "CN=*.prod.notifications.api.blackboard.com," covering the validity window from 2026-08-25 to 2027-03-10.
The assigned risk score for the host is zero. Due to the historical nature of the TLS evidence and the lack of live endpoint validation, the connection between this IP and the Blackboard notification service is inferred but not confirmed by active TLS inspection. Continuous monitoring or corroboration with traffic flow data is recommended to verify the current operational state and purpose of the address.
🏢 Ownership & Registration
| Registered holder | Amazon Data Services Northern Virginia |
| ASN | AS14618 |
| Network Name | AMAZON-IAD |
| CIDR Block | 100.48.0.0/12 |
| RIR | ARIN |
| Network registration country | United States |
| Routing operator | AMAZON-AES - Amazon.com, Inc., US |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| 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 | Unknown / lookup inconclusive amazonaws.com |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Unknown / lookup inconclusive 213.163.51.100.in-addr.arpa |
| fcrDns | Not checked |
☁️ 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
| Port | Probe target | Certificate finding |
|---|---|---|
| (IP-targeted) | CN=*.prod.notifications.api.blackboard.com Historical certificate; current certificate unknown |
| SANs | *.prod.notifications.api.blackboard.com |
| Valid From | 2026-08-25T00:00:00+00:00 |
| Valid Until | 2027-03-10T23:59:59+00:00 |
| TLS Protocol | Tls12 |
| Cipher Suite | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 197 days |
🛡️ Public Network Snapshot
| Origin ASN | AS14618 |
| Network Prefix | 100.48.0.0/12 |
| 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 | 35% | 2 | 2 |
| ownership | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 22% | 6 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Recent
| First Seen | 2026-11-09 05:04:58 UTC |
| Last Seen | 2026-11-14 14:20:42 UTC |
| Profile Built | 2026-11-13 09:48:50 UTC |
| Data Freshness | Recent |
| Signal Types | 20 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 100.51.163.213
Who owns the IP address 100.51.163.213?
100.51.163.213 is registered to Amazon Data Services Northern Virginia. The address falls within the 100.48.0.0/12 network block. Registration is held at ARIN.
Where is 100.51.163.213 located?
Geolocation data places 100.51.163.213 in Ashburn, VA, United States. The local time zone is America/New_York. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 100.51.163.213 malicious or safe?
100.51.163.213 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 ports are open on 100.51.163.213?
Responsive ports observed on 100.51.163.213 include 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.