Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Long-established allocation (33y) +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 145.91.0.0/16
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 145.91.0.0/17 | 32.8K | SURF B.V. | AS1103 | NL |
| 145.91.128.0/18 | 16.4K | SURF B.V. | AS1103 | NL |
| 145.91.192.0/19 | 8.2K | SURF B.V. | AS1103 | NL |
| 145.91.224.0/20 | 4.1K | SURF B.V. | AS1103 | NL |
| 145.91.240.0/20 | 4.1K | SURF B.V. | AS1103 | NL |
Geolocation
First 256 of 65,536 IP addresses in 145.91.0.0/16
BGP Routing
Live BGP anomalies →This block is announced in BGP, observed across our RIPE RIS collectors.
RIR Ownership History
Atom feed ⇲Allocation changes captured weekly from regional internet registry (RIR) delegation files.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | NL |
Frequently Asked Questions
What is 145.91.0.0/16?
145.91.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 145.91.0.0 to 145.91.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 145.91.0.0/16 network?
The 145.91.0.0/16 range is allocated to SURF B.V. and announced via AS1103 from The Netherlands.