216.51.171.83
🏢 Ownership & Registration
| Organization | Citizens Mutual Telephone Company |
| ASN | AS5056 |
| Network Name | NET-INS-216-51-171-0-25 |
| CIDR Block | 216.51.171.0/25 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | blfd-11-static-216-51-171-83.dsl.netins.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | blfd-11-static-216-51-171-83.dsl.netins.net |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | 4/6 domains |
| DMARC | 0/6 domains |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
| Domains Checked | 6 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Web Server |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | *.omadaer.netomadaer.net*.tplinker.nettplinker.net |
| Valid From | 2025-08-21T06:00:51+00:00 |
| Valid Until | 2045-05-08T06:00:51+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha256RSA |
| Validity Period | 7200 days |
🛡️ Public Network Snapshot
| Origin ASN | AS5056 |
| Network Prefix | 216.51.128.0/17 |
| Route mapping | Found |
| HSTS | Enabled |
| CSP | Enabled |
| HTTP/2 | Not detected |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 31% | 2 | 5 |
| routing | 8% | 1 | 1 |
| services | 23% | 2 | 3 |
| ownership | 12% | 2 | 2 |
| reputation | 14% | 1 | 3 |
| geolocation | 17% | 2 | 3 |
| Overall | 17% | 10 | 17 |
| Data Coherence | Mixed Signals (68%) — 2 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
⚠ TLS certificate claims CN but primary geo says US
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-16 04:31:44 UTC |
| Last Seen | 2026-09-21 19:37:21 UTC |
| Profile Built | 2026-09-21 07:30:31 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 31 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 216.51.171.83
Who owns the IP address 216.51.171.83?
216.51.171.83 is registered to Citizens Mutual Telephone Company. The address falls within the 216.51.171.0/25 network block. Registration is held at ARIN.
Where is 216.51.171.83 located?
Geolocation data places 216.51.171.83 in Bloomfield, Iowa, United States. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 216.51.171.83 malicious or safe?
216.51.171.83 currently carries a moderate risk assessment, meaning some indicators warrant caution, but the evidence is mixed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 216.51.171.83?
The reverse DNS (PTR) record for 216.51.171.83 is blfd-11-static-216-51-171-83.dsl.netins.net. This hostname is forward-confirmed, meaning it resolves back to the same address.
What ports are open on 216.51.171.83?
Responsive ports observed on 216.51.171.83 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.