Addresses
2,048
2.0K
Sub-ranges
8+
within this block
PTR Density
0.0%
0 of 2.0K 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.
62/100
Moderate
How this score is built
- Baseline (neutral) 65
- Hosting allocation −6
- Established allocation (11y) +3
- Trust score 62 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 52.122.40.0/21
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 52.122.40.0/22 | 1.0K | Microsoft Corporation | AS8069 | JP |
| 52.122.40.0/22 | 1.0K | Microsoft Corporation | AS8075 | US |
| 52.122.40.0/22 | 1.0K | Microsoft Corporation | AS8069 | US |
| 52.122.40.0/22 | 1.0K | Microsoft Corporation | AS8069 | JP |
| 52.122.44.0/22 | 1.0K | Microsoft Corporation | AS8069 | SE |
| 52.122.44.0/22 | 1.0K | Microsoft Corporation | AS8069 | US |
| 52.122.44.0/22 | 1.0K | Microsoft Corporation | AS8069 | US |
| 52.122.44.0/22 | 1.0K | Microsoft Corporation | AS8069 | SE |
First 256 of 2,048 IP addresses in 52.122.40.0/21
52.122.40.0
52.122.40.1
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52.122.40.255
+ 1.8K more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 52.120.0.0/14.
Announced prefix
Origin AS
Announcement samples
2,704
Last seen
2026-07-24 15:52:32
RIR Ownership History
Atom feed ⇲Allocation changes captured weekly from regional internet registry (RIR) delegation files.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | US |
Frequently Asked Questions
What is 52.122.40.0/21?
52.122.40.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 52.122.40.0 to 52.122.47.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 52.122.40.0/21 network?
The 52.122.40.0/21 range is allocated to Microsoft Corporation and announced via AS8069 from United States.
Last updated: 2026-07-24 15:55:31 UTC
