CIDR Range

4.153.0.0/17

32.8K IPs /17 Microsoft Corporation AS8075 United States ARIN

Addresses

32,768

32.8K

IP Range

4.153.0.0

→ 4.153.127.255

Sub-ranges

within this block

PTR Density

0.1%

31 of 32.8K 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

Baseline (neutral) 65
Has a reverse-DNS (PTR) record +5
Trust score 70 / 100

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

Geolocation

First and last addresses in 4.153.0.0/17

4.153.0.0/17 runs from 4.153.0.0 to 4.153.127.255.

First 16

4.153.0.0 4.153.0.1 4.153.0.2 4.153.0.3 4.153.0.4 4.153.0.5 4.153.0.6 4.153.0.7 4.153.0.8 4.153.0.9 4.153.0.10 4.153.0.11 4.153.0.12 4.153.0.13 4.153.0.14 4.153.0.15

Last 16

4.153.127.240 4.153.127.241 4.153.127.242 4.153.127.243 4.153.127.244 4.153.127.245 4.153.127.246 4.153.127.247 4.153.127.248 4.153.127.249 4.153.127.250 4.153.127.251 4.153.127.252 4.153.127.253 4.153.127.254 4.153.127.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 4.144.0.0/12.

Announced prefix

4.144.0.0/12

Origin AS

AS8075

Announcement samples

9,799

Last seen

2026-10-27 20:58:44

Frequently Asked Questions

What is 4.153.0.0/17?

4.153.0.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 4.153.0.0 to 4.153.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 4.153.0.0/17 network?

The 4.153.0.0/17 range is allocated to Microsoft Corporation and announced via AS8075 from United States.

Last updated: 2026-10-27 21:54:05 UTC