154.18.28.139
154.18.28.139 is an IPv4 address operated by COGENT-174 - Cogent Communications, LLC, US (AS174), with approximate network location Chicago, Japan. As of November 14, 2026, IPDebrief rates it Low Risk (10/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Cogent Communications, LLC |
| ASN | AS174 |
| Network Name | COGENT-154-18-16 |
| CIDR Block | 154.18.0.0/16 |
| RIR | AFRINIC |
| Network registration country | United States |
| Routing operator | COGENT-174 - Cogent Communications, LLC, US |
| 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 Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP. DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| caa | Not checked |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Not checked |
| fcrDns | Not checked |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 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 | AS174 |
| Network Prefix | 154.18.0.0/15 |
| Route mapping | Found |
| RPKI Status | Unknown |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 50% | 2 | 3 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 50% | 2 | 3 |
| reputation | 25% | 1 | 1 |
| geolocation | 25% | 1 | 1 |
| Overall | 33% | 8 | 10 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Stale
| First Seen | 2026-10-02 14:11:09 UTC |
| Last Seen | 2026-11-11 10:05:36 UTC |
| Profile Built | 2026-11-14 05:20:08 UTC |
| Data Freshness | Stale |
| Signal Types | 25 |
| Total Observations | 25 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 154.18.28.139
Who owns the IP address 154.18.28.139?
154.18.28.139 is registered to Cogent Communications, LLC. The address falls within the 154.18.0.0/16 network block. Registration is held at AFRINIC.
Where is 154.18.28.139 located?
Geolocation data places 154.18.28.139 in Chicago, Tokyo, Japan. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 154.18.28.139 malicious or safe?
154.18.28.139 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.