208.83.231.137
208.83.231.137 is an IPv4 address operated by Sumofiber (AS4226), geolocated to Chicago, United States. Its reverse DNS name is 100g-mx204.idf.sumofiber.com. As of October 27, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Organization | Sumofiber |
| ASN | AS4226 |
| Network Name | SUMOFIBER |
| CIDR Block | 208.83.224.0/21 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 100g-mx204.idf.sumofiber.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 100g-mx204.idf.sumofiber.com |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Not 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 | AS4226 |
| Network Prefix | 208.83.228.0/22 |
| 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 | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 25% | 1 | 1 |
| Overall | 20% | 5 | 6 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-27 07:36:05 UTC |
| Last Seen | 2026-11-01 07:00:27 UTC |
| Profile Built | 2026-10-27 07:49:14 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 208.83.231.137
Who owns the IP address 208.83.231.137?
208.83.231.137 is registered to Sumofiber. The address falls within the 208.83.224.0/21 network block. Registration is held at ARIN.
Where is 208.83.231.137 located?
Geolocation data places 208.83.231.137 in Chicago, US-IL, United States. The local time zone is America/Chicago. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 208.83.231.137 malicious or safe?
208.83.231.137 currently carries a high risk assessment, meaning indicators associated with malicious or abusive activity have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 208.83.231.137?
The reverse DNS (PTR) record for 208.83.231.137 is 100g-mx204.idf.sumofiber.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.