ResearchRouting table, RPKI, IRR & looking glass

AS18420 National Central University

AS18420 (NCU-TW) is registered to National Central University in TW. It originates 1 prefix in the global routing table.

1
IPv4 prefixes
0
IPv6 prefixes
65,536
IPv4 addresses
100%
RPKI valid

Who holds AS18420

Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.

AS number
AS18420
Handle
NCU-TW
Organization
National Central University
Country
TW
ASPA
None published

What AS18420 announces

Prefixes originated by AS18420 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).

IPv4 prefixes
1
IPv6 prefixes
0
IPv4 addresses
65,536 (256 /24s)
RPKI valid
1 100%
RPKI invalid
0
RPKI not found
0
ROAs naming AS18420
1
With an IRR route object
1 100%

Announced prefixes

Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.

IPv4 (1)

RPKI valid   RPKI invalid   no ROA covers it

Who AS18420 is reached through

The AS just before AS18420 in the paths our looking glass collectors hold, for 1 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.

Routing registry objects

From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.

Sourceas-nameMaintained by
APNICNCU-TWMAINT-TW-TWNIC

Route objects with origin AS18420: NTTCOM 1 · RADB 1

as-sets that list AS18420 (11)