73.121.234.123
73.121.234.123 is an IPv4 address announced by AS7922, with approximate network location Greeneville, United States. It belongs to a residential connection with reverse DNS name c-73-121-234-123.hsd1.tn.comcast.net. As of October 11, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Comcast Cable Communications, LLC |
| ASN | AS7922 |
| Network Name | KNOXVILLE-CPE-12 |
| CIDR Block | 73.121.0.0/16 |
| RIR | ARIN |
| Network registration country | United States |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | c-73-121-234-123.hsd1.tn.comcast.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | c-73-121-234-123.hsd1.tn.comcast.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 | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS7922 |
| Network Prefix | 73.0.0.0/8 |
| Route mapping | Found |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-06 20:51:17 UTC |
| Last Seen | 2026-10-11 14:51:14 UTC |
| Profile Built | 2026-10-11 16:08:56 UTC |
| Data Freshness | Live |
| Signal Types | 11 |
| Total Observations | 11 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 73.121.234.123
Who owns the IP address 73.121.234.123?
73.121.234.123 is registered to Comcast Cable Communications, LLC. The address falls within the 73.121.0.0/16 network block. Registration is held at ARIN.
Where is 73.121.234.123 located?
Geolocation data places 73.121.234.123 in Greeneville, TN, United States. The local time zone is America/New_York. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 73.121.234.123 malicious or safe?
73.121.234.123 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 73.121.234.123?
The reverse DNS (PTR) record for 73.121.234.123 is c-73-121-234-123.hsd1.tn.comcast.net. This hostname is forward-confirmed, meaning it resolves back to the same address.
Is 73.121.234.123 a VPN, proxy, or data center address?
73.121.234.123 is classified as a residential network based on network ownership and behavioural analysis.