75.221.121.66
75.221.121.66 is an IPv4 address announced by AS6167, with approximate network location Oakland, United States. It belongs to a mobile network with reverse DNS name 66.sub-75-221-121.myvzw.com. As of October 6, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Verizon Business |
| ASN | AS6167 |
| Network Name | WIRELESSDATANEWORK |
| CIDR Block | 75.192.0.0/10 |
| RIR | ARIN |
| Network registration country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 66.sub-75-221-121.myvzw.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | 66.sub-75-221-121.myvzw.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.
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 | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS6167 |
| Network Prefix | 75.221.64.0/18 |
| Route mapping | Found |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-06 17:31:36 UTC |
| Last Seen | 2026-10-10 03:10:11 UTC |
| Profile Built | 2026-10-06 17:34:35 UTC |
| Data Freshness | Live |
| Signal Types | 13 |
| Total Observations | 13 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 75.221.121.66
Who owns the IP address 75.221.121.66?
75.221.121.66 is registered to Verizon Business. The address falls within the 75.192.0.0/10 network block. Registration is held at ARIN.
Where is 75.221.121.66 located?
Geolocation data places 75.221.121.66 in Oakland, CA, United States. The local time zone is America/Los_Angeles. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 75.221.121.66 malicious or safe?
75.221.121.66 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 75.221.121.66?
The reverse DNS (PTR) record for 75.221.121.66 is 66.sub-75-221-121.myvzw.com. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 75.221.121.66 a VPN, proxy, or data center address?
75.221.121.66 is classified as a mobile network and a residential network based on network ownership and behavioural analysis.