100.21.29.175
100.21.29.175 is an IPv4 address operated by Amazon.com, Inc. (AS16509), geolocated to Boardman, United States. It belongs to datacenter or hosting infrastructure with reverse DNS name ec2-100-21-29-175.us-west-2.compute.amazonaws.com. As of October 28, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Network Name | AMAZO-ZPDX |
| CIDR Block | 100.20.0.0/14 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | ec2-100-21-29-175.us-west-2.compute.amazonaws.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | ec2-100-21-29-175.us-west-2.compute.amazonaws.com |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| 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 | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | prod.simplepractice.comclientsecure.me*.api.simplepractice.com*.simplepractice.com*.prod.simplepractice.comsimplepractice.com*.clientsecure.me |
| Valid From | 2026-09-09T00:00:00+00:00 |
| Valid Until | 2027-03-25T23:59:59+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 |
| 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 | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-28 21:06:19 UTC |
| Last Seen | 2026-10-28 21:06:19 UTC |
| Profile Built | 2026-10-28 21:19:58 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 100.21.29.175
Who owns the IP address 100.21.29.175?
100.21.29.175 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 100.21.29.175 located?
Geolocation data places 100.21.29.175 in Boardman, 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 100.21.29.175 malicious or safe?
100.21.29.175 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 100.21.29.175?
The reverse DNS (PTR) record for 100.21.29.175 is ec2-100-21-29-175.us-west-2.compute.amazonaws.com. This hostname is forward-confirmed, meaning it resolves back to the same address.
What ports are open on 100.21.29.175?
Responsive ports observed on 100.21.29.175 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 100.21.29.175 a VPN, proxy, or data center address?
100.21.29.175 is classified as cloud infrastructure and hosting infrastructure based on network ownership and behavioural analysis.