asn.dev

Autonomous system

AS63899 CHUAN-CHAN-NET-A National Taiwan University of Science and Technology

Unclassified APNIC

IPv4 addresses 512 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly TW
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

National Taiwan University of Science and Technology

Taiwan, Province of China · AI-generated

education business university

The AS handle CHUAN-CHAN-NET-A is held by National Taiwan University of Science and Technology.

What it's used for

  • The address space carries university infrastructure, evidenced by the netname ntustccadm and registrant IRT-NTUSTCCADM-TW.
  • The network announces 512 IPv4 addresses across 1 prefix with 1 observed neighbour, indicating a small, self-contained internal estate rather than a transit or large access network.
  • Traffic from this AS consists of academic and administrative endpoints for the university, including research systems and campus services.

Notable

  • The registrant IRT-NTUSTCCADM-TW aligns with the announcer, confirming the space is directly managed by the university.
  • The address inventory consists of a single /23 block (103.191.22.0/23), representing a compact, unified allocation for the institution.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS18046DongFong Technology Co. Ltd.59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
TWTaiwan, Province of China1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS63899
Registry name
CHUAN-CHAN-NET-A
Abuse contact
cheerful@mail.ntust.edu.tw
Registered
2022-10-04
Last changed
2025-11-06
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS63899
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS63899

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 443 networks and 1,784 prefixes, as published 2026-10-19. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check