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CIDR Range

136.47.0.0/21

Addresses
2,048
2.0K
Sub-ranges
0+
within this block
PTR Density
99.3%
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.

78/100
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 136.47.0.0/21

136.47.0.0/21 runs from 136.47.0.0 to 136.47.7.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 136.32.0.0/11.

Announced prefix
Origin AS
Announcement samples
17,583
Last seen
2026-11-13 15:10:39

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 136.47.0.0/21?

136.47.0.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 136.47.0.0 to 136.47.7.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 136.47.0.0/21 network?

The 136.47.0.0/21 range is allocated to Google Fiber Inc. and announced via AS16591 from United States.

Last updated: 2026-11-13 15:24:05 UTC
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