Autonomous system
AS7535 TISNET TISNET Technology Inc.
Unclassified APNIC
Summary
TISNet Technology Inc.
enterprise legacy
TISNET is TISNet Technology Inc. (協志聯合科技), a Taipei IT-services company in the Tatung group. The AS announces a single legacy 139.223.0.0/16, and the reverse DNS across it lands on tatung.com.tw hosts.
What it's used for
- The corporate network of Tatung, the Taiwanese electronics and heavy-electrical manufacturer, together with the network and cloud services TISNet builds on top of it.
- TISNet's own business is enterprise IT: network integration, hosting and web work, domain registration, software licensing and information-security services.
Notable
- This is an enterprise/corporate network, not an eyeball ISP. The reverse DNS that exists resolves to internal-looking Tatung machines such as routers and servers under
tatung.com.twrather than to any subscriber pool. Much of the/16carries no reverse DNS at all. - The registered address on the AS object, on Chungshan (Zhongshan) North Road in Taipei, is the Tatung headquarters site, which is what ties the operator to the group rather than leaving it a standalone hosting name.
Interesting
- The holder name gives no hint of Tatung, and the address space is registered under
TISNET-TWrather than anything Tatung-branded. Reverse DNS is what makes the relationship visible. - A whole
/16for one industrial group is a mark of an early Taiwanese allocation, from an era when a large manufacturer could take class-B-sized space for its own use.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS4780 | Digital United Inc. | 414 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 14 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TW | Taiwan, Province of China | 14 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS7535- Registry name
- TISNET
- Abuse contact
- tony.chu@tisnet.com.tw
- Registered
- 2008-09-04
- Last changed
- 2025-11-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 1 authorising AS7535
- ASPA
- no ASPA record
- IRR
- 86% registered · 6 of 7 announcements
- Route objects
- 509 naming AS7535
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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