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	Prefix	Description

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6

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Peers

	ASN	Description	IPv4	IPv6
	AS3462	HiNet (Chunghwa Telecom)	✔	✔
	AS9924	Taiwan Fixed Network, Telco and Network Service Provider.	✔	✘
	AS4780	Digital United Inc.	✔	✘
	AS1659	Taiwan Academic Network (TANet) Information Center	✘	✔
	AS7539	National Center for High-performance Computing	✔	✘

aut-num:        AS18177
as-name:        NCKU-TW
descr:          National Cheng Kung University
descr:          1, Ta-Hsueh Road, Tainan City, Taiwan
country:        TW
import:         from AS1659 action pref=10; accept ANY
import:         from AS3462 action pref=20; accept ANY
import:         from AS9415 action pref=20; accept ANY
export:         to AS1659 announce AS18177
export:         to AS3462 announce AS18177
export:         to AS9415 announce AS18177
default:        to AS1659 action pref=5; networks ANY
admin-c:        AN205-AP
tech-c:         AN205-AP
abuse-c:        AT939-AP
mnt-by:         MAINT-TW-TWNIC
mnt-irt:        IRT-TANET-TW
last-modified:  2025-11-06T09:09:12Z
source:         APNIC

Last Update: 2026-03-13T03:22:26Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-tfn-domestic	31
NTTCOM	as-tfn-domestic	31
RADB	as-btn-customers	1495
APNIC	as1659:as-tanet	18