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CIDR Range

40.108.128.0/17

32.8K IPs /17 Microsoft Corporation AS8075 United States ARIN
Addresses
32,768
32.8K
IP Range
40.108.128.0
→ 40.108.255.255
Sub-ranges
50+
within this block
PTR Density
0.0%
0 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.

68/100
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 40.108.128.0/17

CIDRIPsOrganizationASNCountry
40.108.204.0/22 1.0K Microsoft Corporation AS8075 US
40.108.204.0/22 1.0K Microsoft Corporation AS8075 US
40.108.204.0/22 1.0K Microsoft Corporation AS8075 US
40.108.172.0/22 1.0K Microsoft Corporation AS8075 US
40.108.172.0/22 1.0K Microsoft Corporation AS8075 US
40.108.172.0/22 1.0K Microsoft Corporation AS8075 US
40.108.176.0/22 1.0K Microsoft Corporation AS8075 NL
40.108.176.0/22 1.0K Microsoft Corporation AS8075 US
40.108.176.0/22 1.0K Microsoft Corporation AS8075 NL
40.108.144.0/22 1.0K Microsoft Corporation AS8075 US
40.108.144.0/22 1.0K Microsoft Corporation AS8075 US
40.108.128.0/22 1.0K Microsoft Corporation AS8075 US
40.108.128.0/22 1.0K Microsoft Corporation AS8075 US
40.108.158.0/23 512 Microsoft Corporation AS8075 AU
40.108.158.0/23 512 Microsoft Corporation AS8075 AU
40.108.192.0/23 512 Microsoft Corporation AS8075 NL
40.108.192.0/23 512 Microsoft Corporation AS8075 US
40.108.192.0/23 512 Microsoft Corporation AS8075 NL
40.108.170.0/23 512 Microsoft Corporation AS8075 US
40.108.148.0/23 512 Microsoft Corporation AS8075 US
40.108.148.0/23 512 Microsoft Corporation AS8075 US
40.108.160.0/23 512 Microsoft Corporation AS8075 IE
40.108.160.0/23 512 Microsoft Corporation AS8075 US
40.108.160.0/23 512 Microsoft Corporation AS8075 IE
40.108.182.0/23 512 Microsoft Corporation AS8075 US
40.108.182.0/23 512 Microsoft Corporation AS8075 US
40.108.184.0/23 512 Microsoft Corporation AS8075 US
40.108.184.0/23 512 Microsoft Corporation AS8075 US
40.108.184.0/23 512 Microsoft Corporation AS8075 US
40.108.170.0/23 512 Microsoft Corporation AS8075 US
40.108.170.0/23 512 Microsoft Corporation AS8075 US
40.108.234.0/23 512 Microsoft Corporation AS8075 US

First and last addresses in 40.108.128.0/17

40.108.128.0/17 runs from 40.108.128.0 to 40.108.255.255.

First 16
40.108.128.0 40.108.128.1 40.108.128.2 40.108.128.3 40.108.128.4 40.108.128.5 40.108.128.6 40.108.128.7 40.108.128.8 40.108.128.9 40.108.128.10 40.108.128.11 40.108.128.12 40.108.128.13 40.108.128.14 40.108.128.15
Last 16
40.108.255.240 40.108.255.241 40.108.255.242 40.108.255.243 40.108.255.244 40.108.255.245 40.108.255.246 40.108.255.247 40.108.255.248 40.108.255.249 40.108.255.250 40.108.255.251 40.108.255.252 40.108.255.253 40.108.255.254 40.108.255.255

BGP Routing

Live BGP anomalies →

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

Announced prefix
40.108.128.0/17
Origin AS
AS8075
Announcement samples
9,783
Last seen
2026-11-13 04:20:52

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 40.108.128.0/17?

40.108.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 40.108.128.0 to 40.108.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 40.108.128.0/17 network?

The 40.108.128.0/17 range is allocated to Microsoft Corporation and announced via AS8075 from United States.

Last updated: 2026-11-13 06:24:05 UTC
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