128.112.136.56
IP Intelligence Dossier
Your IP: 216.73.217.34
🏢 Ownership & Registration
| Organization | Princeton University |
| ASN | AS88 |
| Network Name | PRINCETON |
| CIDR Block | 128.112.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | reflect9.cs.princeton.edu |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | reflect9.cs.princeton.edu |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | 2/2 domains |
| DMARC | 2/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 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 | Apache |
| HTTP Title | — |
🔐 TLS Certificate
CN=reflect9.cs.princeton.edu
Issued by CN=YR2, O=Let's Encrypt, C=US
Self-signed: No
| SANs | mirror.cs.princeton.edureflect9.cs.princeton.edu |
| Valid From | 2026-07-23T05:59:19+00:00 |
| Valid Until | 2026-10-21T05:59:18+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha256RSA |
| Validity Period | 89 days |
| Serial Number | 06868746B1D3B45638CCE0BD8CAE1EEFEC30 |
| Thumbprint | 5AEC99858570F7D3A47B45A1DBE2BEB2FF0C85FE |
🎯 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 | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-11 13:17:19 UTC |
| Last Seen | 2026-09-22 07:37:17 UTC |
| Profile Built | 2026-09-22 08:16:04 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 23 |
🔍 19 signal types · 23 observations collected
This report is generated from 19+ 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.