216.255.100.0/24 Montefiore Medical Center
Announced by AS21821 Montefiore Medical Center. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 216.255.100.0/24
Prefix
Origin
AS21821 MMAHS-01
RPKI
RPKI valid
Size
256 addresses
Less specific
More specifics
0
IRR route objects
2 exact, 2 covering
In RouteViews
2026-10-13 08:02 UTC
Paths
How 216.255.100.0/24 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 13760 32787 21821
| Origin | AS21821 Montefiore Medical Center |
| Origin code | IGP |
| Communities | 13760:3002 36601:150 36601:2001 36601:13760 |
| Updated | 5d 8h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 32787 21821
| Origin | AS21821 Montefiore Medical Center |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 5d 16h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 32787 21821
| Origin | AS21821 Montefiore Medical Center |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 5d 16h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS21821 to originate 216.255.100.0/24 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 216.255.100.0/24 | /24 | AS21821 MMAHS-01 | ARIN |
| 216.255.96.0/19 | /24 | AS6128 CABLE-NET-1 | 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 |
|---|---|---|---|---|
| 216.255.100.0/24 | AS21821 MMAHS-01 | LEVEL3 | Create a route object for customer Montefiore Medical Center | MONT-MNT |
| 216.255.100.0/24 | AS21821 MMAHS-01 | RADB | Akamai Technologies, Inc. | MAINT-AS32787 |
| 216.255.100.0/23 covering | AS21821 MMAHS-01 | ARIN | Montefiore Medical Center 100 Corporate Dr Yonkers, NY 10701 | MNT-CVNT |
| 216.255.96.0/19 covering | AS6128 CABLE-NET-1 | ARIN | CSC Holdings, Inc (Cablevision Lightpath) 1111 Stewart Avenue Bethpage, NY 11714-3533 | MNT-CVNT |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.