Addresses
2,048
2.0K
Sub-ranges
12+
within this block
PTR Density
100.0%
2.0K of 2.0K 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.
73/100
Moderate
How this score is built
- Baseline (neutral) 65
- Has a reverse-DNS (PTR) record +5
- Established allocation (8y) +3
- Trust score 73 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 3.165.0.0/21
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 3.165.4.0/22 | 1.0K | Amazon.com, Inc. | AS16509 | CA |
| 3.165.2.0/23 | 512 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.1.0/24 | 256 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.128/25 | 128 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.0/26 | 64 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.64/27 | 32 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.96/28 | 16 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.120/29 | 8 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.116/30 | 4 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.114/31 | 2 | Amazon.com, Inc. | AS16509 | CA |
| 3.165.0.113 | 1 | Amazon.com, Inc. | AS16509 | US |
| 3.165.0.112 | 1 | Amazon.com, Inc. | AS16509 | CA |
Geolocation
First 256 of 2,048 IP addresses in 3.165.0.0/21
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+ 1.8K more (range too large to list inline)
BGP Routing
Live BGP anomalies →This block is announced in BGP, observed across our RIPE RIS collectors.
Announced prefix
Origin AS
Announcement samples
16,154
Last seen
2026-07-23 01:56:58
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 | — | US |
Frequently Asked Questions
What is 3.165.0.0/21?
3.165.0.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 3.165.0.0 to 3.165.7.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 3.165.0.0/21 network?
The 3.165.0.0/21 range is allocated to Amazon.com, Inc. and announced via AS16509 from United States.
Last updated: 2026-07-23 01:55:34 UTC
