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 38.143.128.0/21
First and last addresses in 38.143.128.0/21
38.143.128.0/21 runs from 38.143.128.0 to 38.143.135.255.
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 38.143.128.0/21?
38.143.128.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 38.143.128.0 to 38.143.135.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 38.143.128.0/21 network?
The 38.143.128.0/21 range is allocated to Cogent Communications, LLC and announced via AS174 from United States.
