151.101.193.21
Intelligence analysis identified IP address 151.101.193.21/32 as a web server endpoint within Fastly, Inc. (ASN 54113) Content Delivery Network infrastructure. The host resolved to a Varnish server and presented a TLS certificate validated for PayPal, Inc.
The address was assigned a Moderate Risk score of 40. While no known campaigns or active attacks were detected, the host was classified as a suspicious host. Geolocation data indicated San Jose, US, but Round-Trip Time measurements contradicted the reported physical distance, flagging a data inconsistency. Neighborhood analysis revealed a mixed classification with 26.67% abuse density within the /24 subnet.
Security operations were advised to implement rate limiting controls due to the moderate risk classification.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Fastly, Inc. |
| ASN | AS54113 |
| Network Name | SKYCA-3 |
| CIDR Block | 151.101.0.0/16 |
| RIR | RIPE |
| 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 | 12/12 domains |
| DMARC | 12/12 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 12 domains |
☁️ 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 | Varnish |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | www.paypal.comarticles.braintreepayments.comassets.braintreegateway.combraintreecharge.combraintreefinancial.combraintreepayments.combraintreepaymentsolutions.combrand.braintreepayments.combusiness.paypal.comc.paypal.com |
| Valid From | 2026-04-01T00:00:00+00:00 |
| Valid Until | 2026-10-16T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 198 days |
| Serial Number | 092A3B1F807EF8CC423FCF2197C5DC90 |
| Thumbprint | 81F62908C5F04119C56993300A6AA49AC3CAF398 |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 33% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 33% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 33% | 2 | 4 |
| Overall | 25% | 10 | 18 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-08-29 13:33:19 UTC |
| Last Seen | 2026-09-25 16:42:00 UTC |
| Profile Built | 2026-09-25 16:50:17 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 47 |
Full dossier details are available via our API.