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CIDR Range

131.107.128.0/17

32.8K IPs /17 Microsoft Corporation AS3598 United States ARIN
Addresses
32,768
32.8K
IP Range
131.107.128.0
→ 131.107.255.255
Sub-ranges
33+
within this block
PTR Density
3.5%
1.1K 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.

76/100
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 131.107.128.0/17

CIDRIPsOrganizationASNCountry
131.107.192.0/18 16.4K Microsoft Corporation AS3598 US
131.107.176.0/20 4.1K Microsoft Corporation AS3598 US
131.107.168.0/22 1.0K Microsoft Corporation AS3598 US
131.107.164.0/22 1.0K Microsoft Corporation AS3598 US
131.107.152.0/22 1.0K Microsoft Corporation AS3598 US
131.107.148.0/22 1.0K Microsoft Corporation AS3598 US
131.107.128.0/22 1.0K Microsoft Corporation AS3598 US
131.107.136.0/22 1.0K Microsoft Corporation AS3598 US
131.107.134.0/23 512 Microsoft Corporation AS3598 US
131.107.172.0/23 512 Microsoft Corporation AS3598 US
131.107.162.0/23 512 Microsoft Corporation AS3598 US
131.107.156.0/23 512 Microsoft Corporation AS3598 US
131.107.144.0/23 512 Microsoft Corporation AS3598 US
131.107.142.0/23 512 Microsoft Corporation AS3598 US
131.107.141.0/24 256 Microsoft Corporation AS3598 US
131.107.175.0/24 256 Microsoft Corporation AS3598 US
131.107.174.0/24 256 Microsoft Corporation AS3598 US
131.107.161.0/24 256 Microsoft Corporation AS3598 US
131.107.160.0/24 256 Microsoft Corporation AS3598 US
131.107.159.0/24 256 Microsoft Corporation AS3598 US
131.107.158.0/24 256 Microsoft Corporation AS3598 US
131.107.146.0/24 256 Microsoft Corporation AS3598 US
131.107.147.0/24 256 Microsoft Corporation AS3598 US
131.107.133.0/24 256 Microsoft Corporation AS3598 US
131.107.140.128/25 128 Microsoft Corporation AS3598 US
131.107.132.128/25 128 Microsoft Corporation AS3598 US
131.107.140.64/26 64 Microsoft Corporation AS3598 US
131.107.132.64/26 64 Microsoft Corporation AS3598 US
131.107.132.32/27 32 Microsoft Corporation AS3598 US
131.107.140.0/27 32 Microsoft Corporation AS3598 US
131.107.140.32/27 32 Microsoft Corporation AS3598 US
131.107.132.0/28 16 Microsoft Corporation AS3598 US

First and last addresses in 131.107.128.0/17

131.107.128.0/17 runs from 131.107.128.0 to 131.107.255.255.

First 16
131.107.128.0 131.107.128.1 131.107.128.2 131.107.128.3 131.107.128.4 131.107.128.5 131.107.128.6 131.107.128.7 131.107.128.8 131.107.128.9 131.107.128.10 131.107.128.11 131.107.128.12 131.107.128.13 131.107.128.14 131.107.128.15
Last 16
131.107.255.240 131.107.255.241 131.107.255.242 131.107.255.243 131.107.255.244 131.107.255.245 131.107.255.246 131.107.255.247 131.107.255.248 131.107.255.249 131.107.255.250 131.107.255.251 131.107.255.252 131.107.255.253 131.107.255.254 131.107.255.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 131.107.0.0/16.

Announced prefix
131.107.0.0/16
Origin AS
AS3598
Announcement samples
8,501
Last seen
2026-11-06 04:38:19

Frequently Asked Questions

What is 131.107.128.0/17?

131.107.128.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 131.107.128.0 to 131.107.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 131.107.128.0/17 network?

The 131.107.128.0/17 range is allocated to Microsoft Corporation and announced via AS3598 from United States.

Last updated: 2026-11-06 04:54:06 UTC
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