104.21.66.197
104.21.66.197 is an IPv4 address operated by CLOUDFLARENET - Cloudflare, Inc., US (AS13335), with approximate network location United States. It belongs to datacenter or hosting infrastructure. As of November 14, 2026, IPDebrief rates it Low Risk (30/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Cloudflare, Inc. |
| ASN | AS13335 |
| Network Name | CLOUDFLARENET |
| CIDR Block | 104.16.0.0/12 |
| RIR | ARIN |
| Network registration country | United States |
| Routing operator | CLOUDFLARENET - Cloudflare, 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 | Not checked |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Not checked |
| fcrDns | Not checked |
☁️ 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 | — |
| 8080 | http-alt | tcp | — |
| 8443 | https-alt | tcp | — |
| Closed Ports | 22, 25, 3389 (4 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS13335 |
| Network Prefix | 104.21.64.0/19 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 13% | 1 | 1 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 1 |
| geolocation | 13% | 1 | 1 |
| Overall | 19% | 8 | 10 |
| Data Coherence | Consistent (100%) |
| Attribution | Very Low (20%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Aging
| First Seen | 2026-10-15 18:51:12 UTC |
| Last Seen | 2026-11-01 12:58:40 UTC |
| Profile Built | 2026-11-14 04:03:43 UTC |
| Data Freshness | Aging |
| Signal Types | 17 |
| Total Observations | 19 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 104.21.66.197
Who owns the IP address 104.21.66.197?
104.21.66.197 is registered to Cloudflare, Inc.. The address falls within the 104.16.0.0/12 network block. Registration is held at ARIN.
Where is 104.21.66.197 located?
Geolocation data places 104.21.66.197 in United States. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 104.21.66.197 malicious or safe?
104.21.66.197 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 104.21.66.197?
Responsive ports observed on 104.21.66.197 include 80, 443, 8080, 8443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 104.21.66.197 a VPN, proxy, or data center address?
104.21.66.197 is classified as a content delivery network based on network ownership and behavioural analysis.