148.76.16.243
148.76.16.243 is an IPv4 address announced by AS6128, with approximate network location Newark, United States. It belongs to a residential connection with reverse DNS name ool-944c10f3.dyn.optonline.net. As of November 11, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Optimum Online (Cablevision Systems) |
| ASN | AS6128 |
| Network Name | OOL-CPE-NWRKNJ-148-76-16-0-21 |
| CIDR Block | 148.76.16.0/21 |
| RIR | ARIN |
| Network registration country | United States |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | ool-944c10f3.dyn.optonline.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | ool-944c10f3.dyn.optonline.net |
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.
| spf | Not checked |
| dmarc | Not checked |
| fcrDns | Not checked |
| dnssec | Not checked |
| caa | Not checked |
☁️ Network Classification
| Infrastructure | Residential |
| Service Purpose | Residential Endpoint |
| Network Tier | End-User — Residential ISP endpoint |
🔌 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 | AS6128 |
| Network Prefix | 148.76.0.0/18 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 12% | 2 | 2 |
| routing | 8% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 12% | 2 | 2 |
| reputation | 8% | 1 | 2 |
| geolocation | 12% | 2 | 2 |
| Overall | 10% | 9 | 10 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Stale
| First Seen | 2026-07-10 14:00:53 UTC |
| Last Seen | 2026-10-10 21:38:48 UTC |
| Profile Built | 2026-11-11 21:41:40 UTC |
| Data Freshness | Stale |
| Signal Types | 18 |
| Total Observations | 21 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 148.76.16.243
Who owns the IP address 148.76.16.243?
148.76.16.243 is registered to Optimum Online (Cablevision Systems). The address falls within the 148.76.16.0/21 network block. Registration is held at ARIN.
Where is 148.76.16.243 located?
Geolocation data places 148.76.16.243 in Newark, New Jersey, United States. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 148.76.16.243 malicious or safe?
148.76.16.243 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 148.76.16.243?
The reverse DNS (PTR) record for 148.76.16.243 is ool-944c10f3.dyn.optonline.net. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 148.76.16.243 a VPN, proxy, or data center address?
148.76.16.243 is classified as a residential network based on network ownership and behavioural analysis.