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CIDR Range

64.128.208.0/21

Addresses
2,048
2.0K
Sub-ranges
0+
within this block
PTR Density
48.5%
994 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.

81/100
Trusted
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 64.128.208.0/21

64.128.208.0/21 runs from 64.128.208.0 to 64.128.215.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 64.128.0.0/15.

Announced prefix
Origin AS
Announcement samples
21,349
Last seen
2026-11-12 19:20:24

Frequently Asked Questions

What is 64.128.208.0/21?

64.128.208.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 64.128.208.0 to 64.128.215.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 64.128.208.0/21 network?

The 64.128.208.0/21 range is allocated to Level 3 Parent, LLC and announced via AS3549 from United States.

Last updated: 2026-11-12 19:54:06 UTC
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