151.101.0.237
Intelligence Briefing: 151.101.0.237
Target Overview: The address was associated with Fastly, Inc. (ASN 54113) within the 151.101.0.0/16 block. Infrastructure analysis identified the role as a Content Delivery Network (CDN) Web Server. The endpoint accepted connections on ports 80 and 443, with server banners indicating Varnish. TLS validation linked the certificate to Squarespace, Inc., issued by DigiCert.
Threat Assessment: No threat indicators, known campaigns, or active attacker classifications were observed. The address was not identified as a spam source or Tor exit node. Blacklist monitoring recorded zero hits, though the control plane indicated one listing against eight total DNSBL lists.
Anomalies: Geolocation data located the host in New York, US, which contradicted RTT physics measurements suggesting a distance of approximately 7625km from the probe. Neighborhood analysis classified the subnet as mostly clean with an abuse density of 0.125 and one threat sibling observed.
Conclusion: The system classified the address as Low Risk with a reputation score of 25. The recommendation was Monitor with low severity due to signal contradictions and very low confidence in the profile data. No firewall rules were generated.
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 | 3/4 domains |
| DMARC | 2/4 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 4 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 | *.squarespace.comsquarespace.com*.campaign-preferences.comcampaign-preferences.com*.sqsp.netsqsp.net*.sqspcdn.comstatic1.1.sqspcdn.comstatic2.1.sqspcdn.comstatic1.2.sqspcdn.com |
| Valid From | 2026-02-10T00:00:00+00:00 |
| Valid Until | 2027-03-03T23:59:59+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_128_GCM_SHA256 |
| Signature Algorithm | sha256RSA |
| Validity Period | 386 days |
| Serial Number | 0EF444771207F0A7402C48A640F83128 |
| Thumbprint | B4EBFD1EAAB11A0773BB9A3268BAD66A9DAEEB23 |
🎯 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 | 28% | 1 | 3 |
| geolocation | 19% | 2 | 2 |
| Overall | 25% | 10 | 17 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-06 15:00:07 UTC |
| Last Seen | 2026-09-15 03:43:16 UTC |
| Profile Built | 2026-09-15 03:58:54 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 33 |
Full dossier details are available via our API.