2001:500:2::c
2001:500:2::c is an IPv6 address operated by Cogent Communications, LLC (AS2149), geolocated to Calgary, United States. It is known as C Root DNS Server (IPv6). Its reverse DNS name is c.root-servers.net. As of November 7, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
⭐ C Root DNS Server (IPv6)
IPv6 address of c.root-servers.net, operated by Cogent Communications — operated by Cogent.
🏢 Ownership & Registration
| Organization | Cogent Communications, LLC |
| ASN | AS2149 |
| Network Name | COGC-6NET-0002 |
| CIDR Block | — |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | c.root-servers.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | c.root-servers.net |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ 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 | |||
| 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 | AS2149 |
| Network Prefix | 2001:500:2::/48 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 2 |
| routing | 25% | 1 | 1 |
| services | 35% | 2 | 2 |
| ownership | 50% | 2 | 3 |
| reputation | 25% | 1 | 1 |
| geolocation | 35% | 2 | 2 |
| Overall | 32% | 9 | 11 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-06 23:26:02 UTC |
| Last Seen | 2026-11-06 23:26:02 UTC |
| Profile Built | 2026-11-07 00:28:56 UTC |
| Data Freshness | Live |
| Signal Types | 17 |
| Total Observations | 17 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 2001:500:2::c
Who owns the IP address 2001:500:2::c?
2001:500:2::c is registered to Cogent Communications, LLC. Registration is held at ARIN.
Where is 2001:500:2::c located?
Geolocation data places 2001:500:2::c in Calgary, AB, United States. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 2001:500:2::c malicious or safe?
2001:500:2::c 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 2001:500:2::c?
The reverse DNS (PTR) record for 2001:500:2::c is c.root-servers.net. This hostname is forward-confirmed, meaning it resolves back to the same address.