Autonomous system
AS4637 ASN-TELSTRA-GLOBAL Telstra Global
Unclassified APNIC
Summary
Telstra Global (Telstra International)
transit backbone legacy
ASN-TELSTRA-GLOBAL is the international IP backbone of Telstra, Australia's largest telecom, operated through its Hong Kong-registered international arm.
What it's used for
- Global IP transit and wholesale connectivity. This is the AS that carries Telstra's international traffic and sells transit to carriers, ISPs, and enterprises across Asia-Pacific and beyond.
Notable
- A carrier backbone, not an eyeball network. Telstra's Australian retail broadband customers sit under different AS numbers; this one is the international wholesale business.
- Telstra International's reach rests on one of the largest subsea cable portfolios in the Asia-Pacific, which is why so many routes between Asia and the rest of the world traverse this AS.
Interesting
- The million-plus addresses announced here make it one of the biggest networks in the APNIC-administered AS block.
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
Recorded at 38 exchanges in 17 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| OpenIXP Internet exchange Point | Jakarta, Indonesia | 218.100.27.139 |
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.246 |
| LINX LON1 | London, United Kingdom | 195.66.224.177 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.212.88 |
| France-IX Paris | Paris, France | 37.49.238.119 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.4 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.237.239 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.197 |
Transit providers
47 upstream, 490 downstream and 540 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 594 prefixes · 1.23M addresses IPv6 255 prefixes
| Country | Name | Prefixes |
|---|---|---|
| HK | Hong Kong | 849 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4637- Registry name
- ASN-TELSTRA-GLOBAL
- Registrant
- Telstra International Limited
- Abuse contact
- IRT@team.telstra.com
- Registered
- 2008-09-04
- Last changed
- 2020-05-26
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 93% valid · 719 valid, 51 with no ROA 1 RPKI-invalid
- ROAs
- 898 authorising AS4637
- ASPA
- no ASPA record
- IRR
- 92% registered · 713 of 771 announcements 14 other origin
- Route objects
- 3,841 naming AS4637
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: 436 networks and 1,771 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