216.73.163.185
216.73.163.185 is an IPv4 address operated by Prefixx, Inc. (AS206092), geolocated to San Francisco, United States. As of September 5, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.
# INTELLIGENCE BRIEFING: 216.73.163.185/32
## Executive Summary
IP address 216.73.163.185 is associated with Prefixx, Inc. (PFX-EXPRESSVPN), an ExpressVPN service provider. The IP presents a low-risk profile (risk score: 25) with no active threat indicators. The address is currently classified as clean with no observed malicious activity.
## Network Ownership & Classification
| Attribute | Value |
|---|---|
| **Organization** | Prefixx, Inc. |
| **Network Name** | PFX-EXPRESSVPN |
| **ASN** | 206092 |
| **CIDR Block** | 216.73.160.0/22 |
| **Location** | San Francisco, CA, US |
| **Registration** | ARIN |
The IP is designated for firewalled/no service purposes with no open ports detected. DNS reverse resolution failed, and no hosted domains were identified.
## Threat Assessment
- Risk Score: 25 (Low Risk)
- Blacklist Status: Listed on 1 of 8 DNSBLs
- Tor Exit Node: No
- Known Attacker: No
- Spam Source: No
- Known Campaigns: None
- Operator Score: 0.1304 (Minimal)
No threat indicators, abuse confidence scores, or known campaign associations were detected. The IP's control plane shows route instability (route changes observed in 30-day period).
## Neighborhood Analysis (216.73.163.0/24)
| Metric | Value |
|---|---|
| **Total Siblings** | 82 |
| **Active Siblings** | 18 |
| **Threat Siblings** | 0 |
| **Abuse Density** | 0 |
| **Subnet Classification** | Clean |
| **Risk Distribution** | 0 High, 1 Medium, 80 Low |
The subnet maintains a clean classification with minimal abuse density. Only one medium-risk neighbor was identified.
## Historical Observation
Fifteen observations tracked since monitoring began. Recent signals consistently show:
- Clean classification with zero inherited risk
- No ownership changes
- Zero threat persistence days
- Minimal operator score maintained
No escalation in threat profile observed over the monitoring period.
## Relationships
Relationship graph identifies only same-network associations with PFX-EXPRESSVPN. No external relationships to organizations, hostnames, or certificates were detected.
## Recommended Actions
No immediate defensive actions required. The IP presents a low-risk profile consistent with legitimate VPN service operations.
SOC Analyst Guidance:
- Monitor for service activation if previously dormant
- No immediate blocking or filtering recommended
- Continue passive observation of subnet activity patterns
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*Intel generated from IPDebrief analysis. All data sourced from IPDebrief intelligence platform.*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Prefixx, Inc. |
| ASN | AS206092 |
| Network Name | PFX-EXPRESSVPN |
| CIDR Block | 216.73.160.0/22 |
| 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 | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ 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 | — |
🛡️ Public Network Snapshot
| Origin ASN | AS206092 |
| Network Prefix | 216.73.163.0/24 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 34% | 2 | 6 |
| routing | 8% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 23% | 2 | 4 |
| reputation | 20% | 1 | 3 |
| geolocation | 35% | 2 | 3 |
| Overall | 22% | 10 | 19 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-13 21:32:25 UTC |
| Last Seen | 2026-10-07 08:53:27 UTC |
| Profile Built | 2026-09-05 22:23:57 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 29 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 216.73.163.185
Who owns the IP address 216.73.163.185?
216.73.163.185 is registered to Prefixx, Inc.. The address falls within the 216.73.160.0/22 network block. Registration is held at ARIN.
Where is 216.73.163.185 located?
Geolocation data places 216.73.163.185 in San Francisco, CA, United States. The local time zone is America/Los_Angeles. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 216.73.163.185 malicious or safe?
216.73.163.185 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.