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	Prefix	Description
	61.56.0.0/20	Government Service Network (GSN)
	61.56.4.0/24	Government Service Network (GSN)
	61.56.8.0/21	Government Service Network (GSN)
	103.189.132.0/23	National Center for Research on Earthquake Engineering
	202.5.12.0/22	National Center for Research on Earthquake Engineering
	2001:4500::/32	National Applied Research Laboratories
	2001:4500:1100::/40	National Applied Research Laboratories
	2001:4500:1100::/41	National Applied Research Laboratories
	2001:4500:1180::/41	National Applied Research Laboratories
	2400:85a0::/32	National Center for Research on Earthquake Engineering

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS9264	Academia Sinica	✘	✔
	AS7539	National Center for High-performance Computing	✔	✘
	AS9505	Taiwan Internet Gateway	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS9264	Academia Sinica	✔	✔
	AS7539	National Center for High-performance Computing	✔	✘
	AS9505	Taiwan Internet Gateway	✔	✘
	AS9681	Formosa Open eXchange(FOX)	✔	✘
	AS18426	National Applied Research Laboratories	✔	✘

aut-num:        AS18183
country:        TW
as-name:        NCREE
admin-c:        TR477-AP
tech-c:         TR477-AP
abuse-c:        TR477-AP
mnt-irt:        IRT-NCREE-TW
descr:          National Center for Research on Earthquake Engineering
descr:          200, Sec. 3, Xinhai Road
descr:          Taipei
default:        to AS7539 action pref=100; networks ANY
export:         to AS7539 announce AS18183
export:         to AS9264 announce AS18183
export:         to AS9505 announce AS18183
import:         from AS7539 action pref=100; accept ANY
import:         from AS9264 action pref=100; accept ANY
import:         from AS9505 action pref=100; accept ANY
remarks:        (oid:NCREE)
last-modified:  2026-01-08T05:14:01Z
source:         APNIC
mnt-by:         MAINT-TW-TWNIC

Last Update: 2026-02-18T03:22:26Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-transroute-spec	19660
RIPE	as20965:as-from-tein-to-geant	656
APNIC	as-63529-as-import-as9505	378
RADB	as18183:as-cone	2
RADB	as-twig	2141
ARIN	as293:as-from-singaren-to-esnet	4548
RADB	as-ebix-transit	73
NTTCOM	as-asnet	15
RADB	as-hurricanev6	20546
APNIC	as63529:as-63529-as-import-as9505	155
LEVEL3	as-level3-origins-na	0
APNIC	as9264:as-partner-a	10