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CIDR Range

191.172.138.0/23

Addresses
512
512
Sub-ranges
0+
within this block
PTR Density
0.0%
0 of 512 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.

72/100
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 191.172.138.0/23

191.172.138.0/23 runs from 191.172.138.0 to 191.172.139.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 191.168.0.0/13.

Announced prefix
Origin AS
Announcement samples
37,616
Last seen
2026-10-28 04:09:20

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 — BR

Frequently Asked Questions

What is 191.172.138.0/23?

191.172.138.0/23 is a CIDR network block containing 512 IPv4 addresses (from 191.172.138.0 to 191.172.139.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 191.172.138.0/23 network?

The 191.172.138.0/23 range is allocated to TIM S/A and announced via AS26615 from Brazil.

Last updated: 2026-10-28 04:39:05 UTC
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