Addresses
4,096
4.1K
Sub-ranges
4+
within this block
PTR Density
0.0%
0 of 4.1K IPs have PTR
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.
75/100
Moderate
How this score is built
- Baseline (neutral) 65
- Long-established allocation (32y) +6
- Enterprise allocation +4
- Trust score 75 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 6.66.128.0/20
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 6.66.128.0/21 | 2.0K | United States Department of Defense DoD | AS749 | US |
| 6.66.140.0/22 | 1.0K | United States Department of Defense DoD | AS749 | US |
| 6.66.136.0/23 | 512 | United States Department of Defense DoD | AS367 | US |
| 6.66.138.0/23 | 512 | United States Department of Defense DoD | AS749 | US |
Geolocation
First 256 of 4,096 IP addresses in 6.66.128.0/20
6.66.128.0
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6.66.128.255
+ 3.8K more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 6.66.128.0/19.
Announced prefix
Origin AS
Announcement samples
18,794
Last seen
2026-09-11 13:44:59
Frequently Asked Questions
What is 6.66.128.0/20?
6.66.128.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 6.66.128.0 to 6.66.143.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 6.66.128.0/20 network?
The 6.66.128.0/20 range is allocated to Headquarters, USAISC and announced via AS1540 from United States.
Last updated: 2026-09-11 14:41:07 UTC
