104.21.43.186
104.21.43.186 is an IPv4 address operated by Cloudflare, Inc. (AS13335), geolocated to United States. It belongs to datacenter or hosting infrastructure. As of November 4, 2026, IPDebrief rates it Low Risk (30/100); no anonymizing service was detected.
IP address 104.21.43.186 was identified as infrastructure associated with Cloudflare, Inc. (ASN 13335), operating within the CLOUDFLARENET network block (104.16.0.0/12). The endpoint functions as a Content Delivery Network (CDN) provider, actively serving web traffic on TCP ports 80, 443, 8080, and 8443. Observations recorded between October 31 and November 3, 2026, classified the address as Low Risk with a risk score of 30. No malicious indicators, known attacker associations, Tor exit node status, or blacklist listings were detected. The immediate subnet (104.21.43.0/24) maintained a clean classification with zero threat siblings. Despite the benign infrastructure classification, a medium-severity rate-limit recommendation was generated to manage potential traffic anomalies.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Cloudflare, Inc. |
| ASN | AS13335 |
| Network Name | CLOUDFLARENET |
| CIDR Block | 104.16.0.0/12 |
| RIR | ARIN |
| Country | United States |
| 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 Hygiene
| Hygiene Score | 0% (None) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not 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 | — |
| 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 | 104.21.32.0/20 |
| 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 | 35% | 2 | 2 |
| ownership | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 22% | 6 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-31 01:06:24 UTC |
| Last Seen | 2026-11-03 11:10:10 UTC |
| Profile Built | 2026-11-04 00:43:06 UTC |
| Data Freshness | Live |
| Signal Types | 18 |
| Total Observations | 19 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 104.21.43.186
Who owns the IP address 104.21.43.186?
104.21.43.186 is registered to Cloudflare, Inc.. The address falls within the 104.16.0.0/12 network block. Registration is held at ARIN.
Where is 104.21.43.186 located?
Geolocation data places 104.21.43.186 in CA. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 104.21.43.186 malicious or safe?
104.21.43.186 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 104.21.43.186?
Responsive ports observed on 104.21.43.186 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 104.21.43.186 a VPN, proxy, or data center address?
104.21.43.186 is classified as a content delivery network based on network ownership and behavioural analysis.