SingTel Optus Pty Ltd

Data as of 2026-08-16
BGP inherited
Cluster stats
Netblocks761 · 6,114,603 IPv4 addresses
IPv6 119 prefixes (largest 2405:9000::/32)
Registered in Australia (582) · Singapore (63) · United States (2) · India (2) · New Zealand (2) · France (1)
Cluster ID222312432
RegistryAPNIC
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 44 shared RIR contact/maintainer handles
Registry names 5 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
775 -166 netblocks since 2026-07-05
2026-07-05 peak 941 2026-08-16

IP Ranges (761)

showing 50 of 761 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
1.40.0.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.40.0.0/14 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.40.64.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.40.128.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.40.192.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.41.0.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.41.64.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.41.128.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.41.192.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.42.0.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.42.64.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.42.128.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.43.0.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.43.64.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.43.128.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.43.192.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.0.0/16 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.0.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.24.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.48.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.160.0/23 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.162.0/23 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.164.0/23 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.166.0/23 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.176.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.180.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.184.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
1.44.188.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
43.247.72.0/24 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.2.0.0/15 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.3.0.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.3.128.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.0.0/12 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.0.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.64.0/18 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.128.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.144.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.160.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.176.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.192.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.208.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.216.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.224.0/20 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.240.0/21 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.248.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.176.252.0/22 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.177.0.0/16 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.178.0.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.178.128.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high
49.179.0.0/17 SingTel Optus Pty Ltd BGP ANNOUNCED ● high

IPv6 ranges (119)

showing the 15 largest allocations
CIDR
2405:9000::/32
2405:dc00:8000::/33
2405:9000:1405::/48
2405:9000:1fc::/48
2405:9000:203::/48
2405:9000:207::/48
2405:9000:80::/48
2405:9000:90::/48
2405:dc00:ec40::/48
2405:dc00:ec41::/48
2405:dc00:ec42::/48
2405:dc00:ec43::/48
2405:dc00:ec44::/48
2405:dc00:ec45::/48
2405:dc00:ec46::/48

Domains hosted in this network

what's this?
fbcdn.net

Customer-delegated space

how is this classified?
Unclassified 681 (89.5%)
Customer access pools 93 (12.2%)
Operator infrastructure (named) 1 (0.1%)

Network trust

what's this?
RPKI hygiene: B how networks compare →
81.3% of checked blocks have valid RPKI ROA coverage (630 of 775)
Possible discrepancies (4)

These blocks are registered to SingTel Optus Pty Ltd but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

166.120.58.0/23 /23 authorized for AS9547 — Westpac Banking Corporation
203.17.138.0/24 /24 authorized for AS14618 — Amazon.com, Inc.
166.120.58.0/24 /24 authorized for AS9547 — Westpac Banking Corporation
166.120.59.0/24 /24 authorized for AS9547 — Westpac Banking Corporation

NIC Handles

AO399-AP APNIC-HM ARS2-AP ARS2-AP AS10128 AS10150 AS10218 AS10221 AS17461 AS17719 AS18191 AS24510 +32 more