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CIDR Range

173.129.0.0/16

Addresses
65,536
65.5K
Sub-ranges
0+
within this block
PTR Density
0.0%
0 of 65.5K 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.

62/100
Moderate
How this score is built

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

First and last addresses in 173.129.0.0/16

173.129.0.0/16 runs from 173.129.0.0 to 173.129.255.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 173.128.0.0/11.

Announced prefix
Origin AS
Announcement samples
10,766
Last seen
2026-11-01 05:14:57

Frequently Asked Questions

What is 173.129.0.0/16?

173.129.0.0/16 is a CIDR network block containing 65,536 IPv4 addresses (from 173.129.0.0 to 173.129.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 173.129.0.0/16 network?

The 173.129.0.0/16 range is allocated to Amazon.com, Inc. and announced via AS16509 from United States.

Last updated: 2026-11-01 05:24:08 UTC
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