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CIDR Range

223.123.128.0/19

Addresses
8,192
8.2K
Sub-ranges
2+
within this block
PTR Density
0.0%
0 of 8.2K 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

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

Ranges inside 223.123.128.0/19

First and last addresses in 223.123.128.0/19

223.123.128.0/19 runs from 223.123.128.0 to 223.123.159.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 223.64.0.0/10.

Announced prefix
Origin AS
Announcement samples
19,799
Last seen
2026-11-14 22:21:34

Frequently Asked Questions

What is 223.123.128.0/19?

223.123.128.0/19 is a CIDR network block containing 8,192 IPv4 addresses (from 223.123.128.0 to 223.123.159.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 223.123.128.0/19 network?

The 223.123.128.0/19 range is allocated to China Mobile Hong Kong Company Limited and announced via AS137872 from Hong Kong.

Last updated: 2026-11-15 01:09:05 UTC
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