104.16.134.27
IP Intelligence Dossier
Your IP: 216.73.217.131
🤖 Witness AIThis summary was generated by AI and may contain inaccuracies. Verify critical details independently.
Intelligence analysis classified IP address 104.16.134.27 as Low Risk (Score: 30) owned by Cloudflare, Inc. (ASN 13335). The endpoint operated as a Content Delivery Network (CDN) web server in the United States. Scanning revealed open TCP ports 80, 443, 8080, and 8443. TLS certificate validation confirmed association with quizlet.com. No malicious indicators, blacklist entries, or known attack campaigns were associated with this address.
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 | 40% (Fair) |
| SPF | Present |
| DMARC | Present |
| 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 | cloudflare |
| HTTP Title | — |
🔐 TLS Certificate
CN=quizlet.com
Issued by CN=YE1, O=Let's Encrypt, C=US
Self-signed: No
| SANs | ablink.account.quizlet.comablink.lifecycle.quizlet.comablink.newsletter.quizlet.comquizlet.com |
| Valid From | 2026-08-23T15:57:03+00:00 |
| Valid Until | 2026-11-21T15:57:02+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha384ECDSA |
| Validity Period | 89 days |
| Serial Number | 06B272A1D5A08786DA52B93BE0658272EE77 |
| Thumbprint | 12043E0E2A5165C4C6F5B3A42B96A3BABEFE0249 |
🎯 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 |
Coverage: 4/6 dimensions · Data sufficiency: partial
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
⚠ Geo sources disagree on country: CA, US
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-03 23:48:36 UTC |
| Last Seen | 2026-09-18 00:58:20 UTC |
| Profile Built | 2026-09-18 01:02:54 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 25 |
🔍 22 signal types · 25 observations collected
This report is generated from 22+ independent intelligence signals including
ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds,
behavioral fingerprinting, and more.
Full dossier details are available via our API.
Full dossier details are available via our API.
ℹ️ About This Report
All data shown is publicly available network metadata — IP addresses do not reliably identify individuals.
Assessments are probabilistic and should not be used as sole basis for access control decisions.
To report an issue or request data review, contact admin@ipdebrief.com.