145.220.100.21
An intelligence assessment was conducted on IP 145.220.100.21/32. The asset was classified as Low Risk with a reputation score of 25 and tagged as a Suspicious Host. Ownership records identified the host under ASN 1101 (IRT-SURFcert) within the NETSURF-NET block (145.220.0.0/16). Geolocation data placed the host in New York, US, though sources disagreed on country designation between NL and US. Technical scans revealed the service purpose as Firewalled / No Services with no open ports detected. Behavioral analysis showed zero honeypot hits, enumeration strikes, or total incidents. DNS records returned a PTR hostname of 145.220.EARLY-REGISTRATION.of.SURFnet.invalid with no SPF, DMARC, or DNSSEC validation. While the blacklist count was zero, the IP appeared on one of eight scanned DNSBL lists. The neighborhood was classified as clean with an abuse density of 0. Due to signal contradictions regarding geographic origin and ownership stability, monitoring was recommended with low severity.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | IRT-SURFcert |
| ASN | AS1101 |
| Network Name | NETSURF-NET |
| CIDR Block | 145.220.0.0/16 |
| RIR | RIPE |
| Country | NL |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 145.220.EARLY-REGISTRATION.of.SURFnet.invalid |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 145.220.EARLY-REGISTRATION.of.SURFnet.invalid |
🔐 DNS Hygiene
| Hygiene Score | 0% (None) |
| SPF | 0/2 domains |
| DMARC | 0/2 domains |
| FCrDNS | Not verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ 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 | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 33% | 2 | 6 |
| routing | 13% | 1 | 1 |
| services | 19% | 2 | 2 |
| ownership | 27% | 2 | 4 |
| reputation | 27% | 1 | 5 |
| geolocation | 27% | 2 | 4 |
| Overall | 24% | 10 | 22 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-03 13:06:34 UTC |
| Last Seen | 2026-09-26 07:32:57 UTC |
| Profile Built | 2026-09-26 07:47:29 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 38 |
Full dossier details are available via our API.