ResearchRouting table, looking glass, RPKI & IRR

203.21.153.0/24 Microsoft Corporation

Announced by AS8075 Microsoft Corporation. RPKI valid Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 203.21.153.0/24

Prefix
203.21.153.0/24
Origin
AS8075 MICROSOFT-CORP-MSN-AS-BLOCK
RPKI
RPKI valid
Size
256 addresses
Less specific
none
More specifics
0
IRR route objects
4 exact, 3 covering
In RouteViews
2026-10-14 16:02 UTC
Paths

How 203.21.153.0/24 is reached

Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.

AS36601 TNT (TNT - Tampa, FL)Collector-1-TAMPA-FL36601 174 8075
OriginAS8075 Microsoft Corporation
Origin codeIGP
Communities174:21001 174:22013 36601:150 36601:174 36601:2001
Updated14h 18m ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 8075
OriginAS8075 Microsoft Corporation
Origin codeIGP
Communities903:900 903:13760
Updated7d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 8075
OriginAS8075 Microsoft Corporation
Origin codeIGP
Communities36295:100
Updated7d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 6939 8075
OriginAS8075 Microsoft Corporation
Origin codeIGP
Communitiesnone
Updated7d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 8075
OriginAS8075 Microsoft Corporation
Origin codeIGP
Communities174:21001 174:22013 36295:100 36295:174
Updated10d 18h ago
RPKI

Route origin authorizations

Covered by a ROA authorizing AS8075 to originate 203.21.152.0/23 up to /24. Validate another origin.

ROA prefixMax lengthAuthorized originTrust anchor
203.21.152.0/23/24AS8075 MICROSOFT-CORP-MSN-AS-BLOCKAPNIC
203.21.152.0/23/24AS9435 SCSPL-AS-APAPNIC
IRR

Route objects

Registered in the IRR for this prefix and the ones covering it. Look it up live.

RouteOriginSourceDescriptionMaintained by
203.21.153.0/24AS8075 MICROSOFT-CORP-MSN-AS-BLOCKAPNICSuncorp-Metway Limited 123 Albert StMAINT-SCSPL-AU
203.21.153.0/24AS9435 SCSPL-AS-APAPNICSuncorp-Metway Limited 123 Albert StMAINT-SCSPL-AU
203.21.153.0/24AS8075 MICROSOFT-CORP-MSN-AS-BLOCKRADBMicrosoft ByoIpMAINT-AS8075
203.21.153.0/24AS4657 STARHUB-INTERNETREACHREACH (Customer Route)MAINT-REACH-NOC
203.21.152.0/23 coveringAS8075 MICROSOFT-CORP-MSN-AS-BLOCKAPNICSuncorp-Metway Limited 123 Albert StMAINT-SCSPL-AU
203.21.152.0/23 coveringAS9435 SCSPL-AS-APAPNICSuncorp-Metway Limited 123 Albert StMAINT-SCSPL-AU
203.21.128.0/18 coveringAS198949 RadwareRADBIRIDEOSMAINT-AS198949
Tools

Check 203.21.153.0/24 live

Looking glassIP to ASN APIRPKI APIIRR API