172.221.160.21
172.221.160.21 is an IPv4 address, with approximate network location Granite City, United States. Its reverse DNS name is syn-172-221-160-021.res.spectrum.com. As of November 12, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | Unknown |
| ASN | — |
| Network Name | — |
| CIDR Block | — |
| RIR | — |
| Network registration country | — |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | syn-172-221-160-021.res.spectrum.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | syn-172-221-160-021.res.spectrum.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 | 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 | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS20115 |
| Network Prefix | 172.221.128.0/17 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 16% | 4 | 4 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (30%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Stale
| First Seen | 2026-10-06 16:01:11 UTC |
| Last Seen | 2026-10-06 16:01:11 UTC |
| Profile Built | 2026-11-12 07:00:50 UTC |
| Data Freshness | Stale |
| Signal Types | 12 |
| Total Observations | 12 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 172.221.160.21
Where is 172.221.160.21 located?
Geolocation data places 172.221.160.21 in Granite City, IL, United States. The local time zone is America/Chicago. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 172.221.160.21 malicious or safe?
172.221.160.21 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 172.221.160.21?
The reverse DNS (PTR) record for 172.221.160.21 is syn-172-221-160-021.res.spectrum.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.