140.112.0.0/17 National Taiwan University
Announced by AS17716 National Taiwan University. RPKI invalid Seen by 0 of our 5 looking glass sessions.
Summary
What the table says about 140.112.0.0/17
Prefix
Origin
AS17716 NTU-TW
RPKI
RPKI invalid
Size
32,768 addresses
Less specific
More specifics
0
IRR route objects
1 exact, 6 covering
In RouteViews
2026-10-13 04:03 UTC
RPKI
Route origin authorizations
AS17716 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 |
|---|---|---|---|
| 140.112.0.0/16 | /16 | AS17716 NTU-TW | APNIC |
| 140.112.0.0/12 | /12 | 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 |
|---|---|---|---|---|
| 140.112.0.0/17 | AS17709 APT | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
| 140.112.0.0/16 covering | AS17716 NTU-TW | NTTCOM | NTU (proxy-registered route object) | MAINT-ASNET |
| 140.112.0.0/16 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
| 140.112.0.0/12 covering | AS17717 MOECC-IPV6 | LEVEL3 | Proxy-registered route object. Workaround the IRR filter issue for TANet. Because they forgot to add value on their PeeringDB as-set field. | XINGXUNTECHLTD-MNT |
| 140.112.0.0/12 covering | AS1659 ERX-TANET-ASN1 | NTTCOM | TANET (proxy-registered route object) | MAINT-ASNET |
| 140.112.0.0/12 covering | AS1659 ERX-TANET-ASN1 | RADB | Transit Customer AS1659 (TANet) of EBIX (AS17709) | MAINT-AS17709 |
| 140.112.0.0/12 covering | AS9505 TWGATE-AP | REACH | REACH (Customer Route) | MAINT-REACH-NOC |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.