140.131.4.0/22 Taiwan Academic Network (TANet) Information Center
Announced by AS1659 Taiwan Academic Network (TANet) Information Center. RPKI invalid Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 140.131.4.0/22
Prefix
Origin
AS1659 ERX-TANET-ASN1
RPKI
RPKI invalid
Size
1,024 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
AS1659 does hold a ROA covering this prefix, but the announcement is more specific than that ROA's maximum length allows. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 140.131.0.0/16 | /16 | AS17716 NTU-TW | APNIC |
| 140.128.0.0/13 | /13 | 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 |
|---|---|---|---|---|
| 140.128.0.0/13 covering | AS1659 ERX-TANET-ASN1 | NTTCOM | TANET (proxy-registered route object) | MAINT-ASNET |
| 140.128.0.0/13 covering | AS1659 ERX-TANET-ASN1 | RADB | Transit Customer AS1659 (TANet) of EBIX (AS17709) | MAINT-AS17709 |
| 140.128.0.0/13 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.