Autonomous system
AS18045 SINOPAC SinoPac Holdings Corporate Network
Unclassified APNIC
Summary
SinoPac Holdings
business corporate internal
SINOPAC is the autonomous system for SinoPac Holdings, a major Taiwanese conglomerate.
What it's used for
- The address space is dedicated to the corporate network, with all seven prefixes registered under the netname
SINOPAC-NET. - The AS announces 3072 IPv4 addresses across 7 prefixes, while maintaining 0 observed routing neighbours, indicating a closed internal estate rather than a transit or access provider.
Notable
- All registrants in the inventory are
IRT-SINOPAC-TW, which aligns perfectly with the announcer identity. - The inventory consists of a contiguous block within the 211.76.144.0/20 range, subdivided into /22, /23, and /24 prefixes for internal segmentation.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 3.07K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TW | Taiwan, Province of China | 7 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS18045- Registry name
- SINOPAC
- Abuse contact
- elton@sinopac.com
- Registered
- 2008-09-04
- Last changed
- 2025-11-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 12 valid, 0 with no ROA
- ROAs
- 1 authorising AS18045
- ASPA
- no ASPA record
- IRR
- 100% registered · 12 of 12 announcements
- Route objects
- 30 naming AS18045
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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