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.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Microsoft
Microsoft Corporation is an American multinational technology company headquartered in Redmond, Washington. The company became influential in the rise of personal computers through software like Windows and has since expanded into areas such as Internet services, cloud computing, artificial intelligence, video gaming, and more.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 66.151.66.0/24 | 256 |
0.8%
|
Microsoft Corporation | US | — | — |
| 67.208.167.0/24 | 256 |
52.3%
|
Microsoft Corporation | US | — | — |
| 74.123.179.0/24 | 256 |
0.0%
|
Microsoft Corporation | US | — | — |
| 192.135.86.0/24 | 256 |
9.4%
|
Microsoft Corporation | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS17144 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 74.123.179.0/24 | 16,400 | 2026-08-05 12:17:48 |
| 66.151.66.0/24 | 12,822 | 2026-08-05 12:22:16 |
| 67.208.167.0/24 | 8,779 | 2026-08-05 12:17:48 |
| 192.135.86.0/24 | 8,402 | 2026-08-05 12:15:13 |
Frequently Asked Questions
What is AS17144?
AS17144 is an Autonomous System Number assigned to Microsoft Corporation. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS17144 announce?
AS17144 announces 1.0K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in United States.
Who operates AS17144?
AS17144 is operated by Microsoft Corporation. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS17144 registered in?
AS17144 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
