AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation
Announced Prefixes (BGP)
1,372total
1,239 IPv4133 IPv6
IPv4 Addresses
Allocated (RIR)74.4M
Announced (BGP)81.8M
IPv6 Addresses
Allocated (RIR)8.7×10²⁹
Announced (BGP)1.1×10³¹
Prefix Limit (IPv4)
100,000
Prefix Limit (IPv6)
500
Allocated
-
Routing hygiene
Score 15/100 · Low riskRPKI ROA coverage
98%
2 prefixes RPKI invalid
IRR route objects
98.6%
4 prefixes registered for another origin
Hijack signals
20
1 announced against others' ROAs, 19 own announced by others
Upstreams
14
diversity 23/100
- Routes concentrated on one upstream (87% of routes)
- Announces 1 prefix that RPKI assigns to another network (possible hijack or misconfiguration)
Based on 1,365 announced prefixes, updated daily (2026-10-19). How the score works · RPKI explained
Listed on the threat map (2026-10-19)
- #7 of the 50 networks with the most flagged IPs worldwide (248 flagged networks)
- #3 in Australia (15 flagged networks located there)
- #3 in Ireland (5 flagged networks located there)
- #4 in the United Arab Emirates (5 flagged networks located there)
- #4 in Qatar (1 flagged network located there)
- #4 in the United States (122 flagged networks located there)
- #5 in Denmark (1 flagged network located there)
- #6 in Switzerland (3 flagged networks located there)
- #6 in India (25 flagged networks located there)
- #6 in South Korea (14 flagged networks located there)
- #6 in Norway (1 flagged network located there)
- #7 in Austria (1 flagged network located there)
- #7 in Spain (4 flagged networks located there)
- #7 in Israel (3 flagged networks located there)
- #7 in the Netherlands (8 flagged networks located there)
- #8 in Mexico (2 flagged networks located there)
- #10 in Malaysia (2 flagged networks located there)
- #10 in Singapore (5 flagged networks located there)
- #3 for scanners (17 flagged networks)
- #5 for brute force sources (168 flagged networks)
- #10 for botnet hosts (25 flagged networks)
Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.
Announced Prefixes
(BGP)1,000 of 1,372|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRR | - | |
| Valid | Other IRRRIPE | - |
1-10 of 1,000
1 / 100
Allocated Prefixes
(RIR)500Prefix | Country | RIR | Status |
|---|---|---|---|
| 1.186.0.0/16 | 🇬🇧 GB | RIPENCC | allocated |
| 2.58.103.0/24 | 🇩🇪 DE | RIPE | assigned |
| 4.144.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.160.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.176.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.192.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.208.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.224.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 4.240.0.0/12 | 🇺🇸 US | ARIN | allocated |
| 5.23.34.0/24 | 🇮🇹 IT | RIPE | assigned |
1-10 of 500
1 / 50
All 1,372 announced prefixes of AS8075 →
Downstream Customers(8)
| ASN | Name |
|---|---|
| AS8542 | 🇳🇴Eviny-AS8542 Eviny Fiber AS |
| AS16766 | 🇺🇸ISLAND-TECHNOLOGY-INC - Island Technology, Inc. |
| AS49935 | 🇧🇪SmartEye SmartEye B.V |
| AS135244 | KNET-AS - Kedia Internet Private Limited |
| AS201345 | 🇯🇵Shuma-Watanabe Shuma Watanabe |
| AS201671 | 🇧🇪Argenta Argenta Spaarbank NV |
| AS218672 | 🇨🇭APARES-AS Alexandre PARES |
| AS401880 | 🇺🇸KESHIA-SERVICES-FINANCIAL-SYSTEMS - Keshia Services Inc. |
BGP Neighbours
(seen in AS paths)Upstreams (12)
Networks AS8075 hands its own prefixes to: transit providers, or peers at an exchange.
- AS33891CORE BACKBONE Core Backbone1,194
- AS6939Hurricane Electric120
- AS35280F5 Networks SARL12
- AS37100SEACOM Limited SEACOM Limited11
- AS27986ENTEL CHILE S.A9
- AS12956TELXIUS TELEFONICA GLOBAL SOLUTIONS SL8
- AS15412FLAG Telecom UK Limited6
- AS6762SEABONE NET TELECOM ITALIA SPARKLE S.P.A5
- AS34549MEER Meerfarbig & . KG3
- AS34177CELESTE SAS2
- AS1299TWELVE99 Arelion Sweden AB1
- AS48362TKSWF Stadtwerke Feldkirch1
Downstreams (7)
Networks whose own prefixes AS8075 passes on: usually its customers.
Other adjacent networks (8)
Adjacent to AS8075 in the transit part of AS paths: peers, providers or customers.
- AS4755TATA Communications Formerly VSNL Is Leading ISP54
- AS2907Research Organization Of Information And Systems, National Institute Of Informatics50
- AS3356Level 3 Parent19
- AS9318SK Broadband14
- AS39386STC IGW Saudi Telecom Company JSC9
- AS55836Reliance Jio Infocomm Limited6
- AS8966Etisalat EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC5
- AS9002RETN Limited1
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- How to run an ASPA checkVerify the upstream providers listed above
- IPv4 transfer marketTransfers published by all five RIRs
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/8075Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/8075" | jq