100.21.121.149
100.21.121.149 is an IPv4 address operated by AMAZON-02 - Amazon.com, Inc., US (AS16509), with approximate network location Boardman, United States. It belongs to datacenter or hosting infrastructure with reverse DNS name ec2-100-21-121-149.us-west-2.compute.amazonaws.com. As of November 14, 2026, IPDebrief rates it Low Risk (10/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Amazon.com, Inc. |
| ASN | AS16509 |
| Network Name | AMAZO-ZPDX |
| CIDR Block | 100.20.0.0/14 |
| RIR | ARIN |
| Network registration country | United States |
| Routing operator | AMAZON-02 - Amazon.com, Inc., US |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | ec2-100-21-121-149.us-west-2.compute.amazonaws.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | ec2-100-21-121-149.us-west-2.compute.amazonaws.com |
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.
Partial coverage: 1 conclusive IP DNS checks.
| caa | Not found at queried name com |
| spf | Mixed results across queried names ec2-100-21-121-149.us-west-2.compute.amazonaws.com, samsungknox.com |
| dmarc | Mixed results across queried names _dmarc.ec2-100-21-121-149.us-west-2.compute.amazonaws.com, _dmarc.samsungknox.com |
| dnssec | Unknown / lookup inconclusive 149.121.21.100.in-addr.arpa |
| fcrDns | Present / verified ec2-100-21-121-149.us-west-2.compute.amazonaws.com |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 80, 3389, 8080, 8443 (1 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| Port | Probe target | Certificate finding |
|---|---|---|
| (IP-targeted) | CN=*.samsungknox.com Historical certificate; current certificate unknown |
| SANs | *.samsungknox.com |
| Valid From | 2026-07-10T00:00:00+00:00 |
| Valid Until | 2027-01-23T23:59:59+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 | 100.20.0.0/14 |
| Route mapping | Found |
🎯 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 | Consistent (100%) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-07 07:57:26 UTC |
| Last Seen | 2026-11-12 22:07:35 UTC |
| Profile Built | 2026-11-14 08:02:18 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 26 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 100.21.121.149
Who owns the IP address 100.21.121.149?
100.21.121.149 is registered to Amazon.com, Inc.. The address falls within the 100.20.0.0/14 network block. Registration is held at ARIN.
Where is 100.21.121.149 located?
Geolocation data places 100.21.121.149 in Boardman, OR, United States. The local time zone is America/Los_Angeles. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 100.21.121.149 malicious or safe?
100.21.121.149 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 100.21.121.149?
The reverse DNS (PTR) record for 100.21.121.149 is ec2-100-21-121-149.us-west-2.compute.amazonaws.com. This hostname is forward-confirmed, meaning it resolves back to the same address.
What ports are open on 100.21.121.149?
Responsive ports observed on 100.21.121.149 include 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 100.21.121.149 a VPN, proxy, or data center address?
100.21.121.149 is classified as cloud infrastructure and hosting infrastructure based on network ownership and behavioural analysis.