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 (35y) +6
- Has a reverse-DNS (PTR) record +5
- Isp allocation +5
- Trust score 81 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 38.221.128.0/18
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 38.221.160.0/19 | 8.2K | Cogent Communications, LLC | AS174 | US |
| 38.221.144.0/20 | 4.1K | Cogent Communications, LLC | AS174 | US |
| 38.221.136.0/21 | 2.0K | Cogent Communications, LLC | AS174 | US |
| 38.221.132.0/22 | 1.0K | Cogent Communications, LLC | AS174 | US |
| 38.221.130.0/23 | 512 | Cogent Communications, LLC | AS174 | US |
| 38.221.128.0/24 | 256 | Cogent Communications, LLC | AS174 | US |
| 38.221.129.0/24 | 256 | Cogent Communications, LLC | AS174 | US |
First and last addresses in 38.221.128.0/18
38.221.128.0/18 runs from 38.221.128.0 to 38.221.191.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 38.0.0.0/8.
RIR Ownership History
Atom feed ⇲Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | US |
Frequently Asked Questions
What is 38.221.128.0/18?
38.221.128.0/18 is a CIDR network block containing 16,384 IPv4 addresses (from 38.221.128.0 to 38.221.191.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 38.221.128.0/18 network?
The 38.221.128.0/18 range is allocated to Cogent Communications, LLC and announced via AS174 from United States.
