Autonomous system
AS4804 MPX-AS Microplex PTY LTD
Mobile APNIC
Summary
Optus
isp mobile eyeball backbone
Optus (Microplex PTY LTD, SingTel Optus) — one of Australia's largest telecom operators, owned by Singapore's Singtel. This ASN carries both mobile and consumer fixed traffic.
What it's used for
- Mobile data for millions of Australian subscribers (4G/5G), plus fixed broadband (NBN resale and cable).
Notable
- A large "eyeball" network — addresses are typically mobile devices or consumer home connections, often behind carrier-grade NAT.
- The second-largest Australian carrier after Telstra, competing also with TPG and Vodafone Australia.
Interesting
- Optus is a wholly owned subsidiary of Singtel, part of a broader regional telecom group across Asia-Pacific.
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 111 prefixes · 5.27M addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| AU | Australia | 113 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4804- Registry name
- MPX-AS
- Registrant
- SingTel Optus Pty Ltd
- Abuse contact
- abuse@optusnet.com.au
- Registered
- 2008-09-04
- Last changed
- 2021-01-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 99.7% valid · 394 valid, 0 with no ROA 1 RPKI-invalid
- ROAs
- 596 authorising AS4804
- ASPA
- no ASPA record
- IRR
- 100% registered · 395 of 395 announcements
- Route objects
- 715 naming AS4804
Reputation
Classification and threat
Mobile Cellular carrier. Addresses are shared by many handsets via CGNAT.
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 1,772 prefixes, as published 2026-10-15. 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