128.231.0.0/16 National Institutes of Health
Announced by AS3527 National Institutes of Health. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 128.231.0.0/16
Prefix
Origin
AS3527 NIH-NET
RPKI
RPKI valid
Size
65,536 addresses
Less specific
none
More specifics
2
IRR route objects
4 exact, 0 covering
In RouteViews
2026-10-12 16:02 UTC
Paths
How 128.231.0.0/16 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 13760 3356 15029×3 19050 3527×7
| Origin | AS3527 National Institutes of Health |
| Origin code | IGP |
| Communities | 202:110 202:202 3356:3 3356:22 3356:80 3356:123 3356:575 3356:901 3356:2057 3527:6 15029:5 19050:805 36601:150 36601:2001 36601:13760 |
| Updated | 4d 13h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 15029×3 19050 3527×7
| Origin | AS3527 National Institutes of Health |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 4d 21h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 11164 10886 3527
| Origin | AS3527 National Institutes of Health |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 4d 21h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS3527 to originate 128.231.0.0/16 up to /25. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 128.231.0.0/16 | /25 | AS3527 NIH-NET | ARIN |
IRR
Route objects
Registered in the IRR for this prefix and the ones covering it. Look it up live.
| Route | Origin | Source | Description | Maintained by |
|---|---|---|---|---|
| 128.231.0.0/16 | AS3527 NIH-NET | ARIN | 9000 Rockville Pike MSC 4805 Bethesda MD 20892-4805 United States | MNT-NIH-Z |
| 128.231.0.0/16 | AS70 NLM-GW | LEVEL3 | NLM.NIH.GOV maintainer | NLM-MNT |
| 128.231.0.0/16 | AS3527 NIH-NET | LEVEL3 | Proxy-registered route object | LEVEL3-MNT |
| 128.231.0.0/16 | AS3527 NIH-NET | RADB | Proxy-registered route object for NIH | MAINT-AS10886 |
More specific
Prefixes inside 128.231.0.0/16
2 announced prefixes fall inside this one.