United States · Hosting
AS8075
Microsoft Corporation
Hosting ARIN MICROSOFT-CORP-MSN-AS-BLOCK
Azure. Microsoft bought 20.0.0.0/8 outright, giving it one of the largest contiguous blocks in commercial hands.
Hosting — Cloud and dedicated servers. Widely flagged as datacenter traffic.
- Announced prefixes
- 6
- 5 IPv4 · 1 IPv6
- IPv4 addresses
- 26M
- across the blocks listed below
- Largest block
- /8
- smallest prefix length announced
- Registry
- ARIN
- MICROSOFT-CORP-MSN-AS-BLOCK
01 Ranges
Announced ranges
The blocks AS8075 advertises to the rest of the internet in this snapshot. A production routing table carries more — large carriers de-aggregate for traffic engineering — so treat the totals as a floor.
Matched in your browser against the 6 blocks below. Nothing is sent anywhere.
IPv4 — 5 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 13.64.0.0/11 | 13.64.0.0 | 13.95.255.255 | 2,097,152 |
| 20.0.0.0/8 | 20.0.0.0 | 20.255.255.255 | 16,777,216 |
| 40.64.0.0/10 | 40.64.0.0 | 40.127.255.255 | 4,194,304 |
| 52.224.0.0/11 | 52.224.0.0 | 52.255.255.255 | 2,097,152 |
| 104.40.0.0/13 | 104.40.0.0 | 104.47.255.255 | 524,288 |
IPv6 — 1 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 2603:1000::/24 | 2603:1000:: | 2603:10ff:ffff:ffff:ffff:ffff:ffff:ffff | 2^104 |