203.72.0.0/21 Taiwan Academic Network (TANet) Information Center
Announced by AS1659 Taiwan Academic Network (TANet) Information Center. RPKI valid Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 203.72.0.0/21
Prefix
Origin
AS1659 ERX-TANET-ASN1
RPKI
RPKI valid
Size
2,048 addresses
Less specific
More specifics
0
IRR route objects
0 exact, 3 covering
In RouteViews
2026-10-12 16:02 UTC
RPKI
Route origin authorizations
Covered by a ROA authorizing AS1659 to originate 203.72.0.0/16 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 203.72.0.0/21 | /21 | AS17712 CCU-TW | APNIC |
| 203.72.0.0/16 | /24 | AS1659 ERX-TANET-ASN1 | APNIC |
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 |
|---|---|---|---|---|
| 203.72.0.0/16 covering | AS1659 ERX-TANET-ASN1 | NTTCOM | TANET (proxy-registered route object) | MAINT-ASNET |
| 203.72.0.0/16 covering | AS1659 ERX-TANET-ASN1 | RADB | Transit Customer AS1659 (TANet) of EBIX (AS17709) | MAINT-AS17709 |
| 203.72.0.0/16 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.