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CIDR Range

121.152.0.0/13

524.3K IPs /13 South Korea APNIC
Addresses
524,288
524.3K
Sub-ranges
50+
within this block
PTR Density
0.1%
665 of 524.3K 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.

70/100
Moderate
How this score is built

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

Ranges inside 121.152.0.0/13

First and last addresses in 121.152.0.0/13

121.152.0.0/13 runs from 121.152.0.0 to 121.159.255.255.

First 16
Last 16

This block is announced in BGP, observed across our RIPE RIS collectors.

Announced prefix
Origin AS
Announcement samples
21,708
Last seen
2026-10-30 11:49:54

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 — KR

Frequently Asked Questions

What is 121.152.0.0/13?

121.152.0.0/13 is a CIDR network block containing 524,288 IPv4 addresses (from 121.152.0.0 to 121.159.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 121.152.0.0/13 network?

The 121.152.0.0/13 range is allocated to an unknown organization from South Korea.

Last updated: 2026-10-30 12:09:05 UTC
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