137.164.50.243
IP address 137.164.50.243 was attributed to CENIC (CALREN) within the 137.164.0.0/16 block and maintained a Low Risk reputation with a risk score of 20. Network analysis indicated the host was firewalled with no open ports or active services. Behavioral data showed no enumeration strikes, honeypot hits, or known campaign associations, and the address remained absent from all identified threat feeds. DNS resolution confirmed the hostname sha-coe-2--cor-agg8--10g--01.cenic.net. Geolocation data pointed to Portola, California, US, but validation checks flagged a contradiction where the claimed distance of 8559.8km conflicted with the measured RTT of 95ms against the minimum possible threshold of 171.2ms. The subnet 137.164.50.0/24 was classified as clean with zero abuse density. Due to signal contradictions, the overall confidence was labeled Very Low, and the recommended action was to Monitor for changes.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | CENIC |
| ASN | AS2152 |
| Network Name | CALREN |
| CIDR Block | 137.164.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | sha-coe-2--cor-agg8--10g--01.cenic.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | sha-coe-2--cor-agg8--10g--01.cenic.net |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | 2/2 domains |
| DMARC | 0/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 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 | 19% | 2 | 2 |
| ownership | 27% | 2 | 3 |
| reputation | 28% | 1 | 3 |
| geolocation | 33% | 2 | 4 |
| Overall | 25% | 10 | 17 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-08-29 23:12:31 UTC |
| Last Seen | 2026-09-23 22:55:29 UTC |
| Profile Built | 2026-09-23 23:03:07 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 29 |
Full dossier details are available via our API.