209.91.216.91
209.91.216.91 is an IPv4 address operated by CRITICALHUBNET - Critical Hub Networks, PR (AS23114), with approximate network location San Juan, Puerto Rico. Its reverse DNS name is sant-core2-mx-100.criticalhub.com. As of November 14, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Caribbean Internet Service |
| ASN | AS23114 |
| Network Name | CARIBE97 |
| CIDR Block | 209.91.192.0/18 |
| RIR | ARIN |
| Network registration country | United States |
| Routing operator | CRITICALHUBNET - Critical Hub Networks, PR |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | sant-core2-mx-100.criticalhub.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | sant-core2-mx-100.criticalhub.com |
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.
Partial coverage: 1 conclusive IP DNS checks.
| caa | Not found at queried name com |
| spf | Not found at queried name sant-core2-mx-100.criticalhub.com |
| dmarc | Not found at queried name _dmarc.sant-core2-mx-100.criticalhub.com |
| dnssec | Unknown / lookup inconclusive 91.216.91.209.in-addr.arpa |
| fcrDns | Not found at queried name sant-core2-mx-100.criticalhub.com |
☁️ 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 | AS23114 |
| Network Prefix | 209.91.192.0/18 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 35% | 2 | 2 |
| ownership | 0% | 0 | 0 |
| reputation | 25% | 1 | 1 |
| geolocation | 25% | 1 | 1 |
| Overall | 24% | 7 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Fresh
| First Seen | 2026-10-23 15:00:15 UTC |
| Last Seen | 2026-11-02 11:35:06 UTC |
| Profile Built | 2026-11-14 08:58:29 UTC |
| Data Freshness | Fresh |
| Signal Types | 20 |
| Total Observations | 28 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 209.91.216.91
Who owns the IP address 209.91.216.91?
209.91.216.91 is registered to Caribbean Internet Service. The address falls within the 209.91.192.0/18 network block. Registration is held at ARIN.
Where is 209.91.216.91 located?
Geolocation data places 209.91.216.91 in San Juan. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 209.91.216.91 malicious or safe?
209.91.216.91 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.
What is the hostname for 209.91.216.91?
The reverse DNS (PTR) record for 209.91.216.91 is sant-core2-mx-100.criticalhub.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.