AS10128 Optus Customer Network

IAG-AS-AP - Optus Customer Network · registered in Australia

IPv4 addresses2,3045 prefixes · <0.001% of announced IPv4

Rank in Australia#318largest network in AU by IPv4 space, of 1,660 · <0.01% of AU

Rank worldwide#20,827of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryAustralia1,688 ASNs registered there

Open AS10128 in ASN lookup Look up an IP in this network (168.140.176.1) All networks in Australia

IPv4 prefixes

All 5 prefixes, in address order.

168.140.176.0/22
168.140.180.0/23
168.140.182.0/24
168.140.188.0/24
168.140.229.0/24

Other ASNs named Optus Customer Network

6 other networks use the same organisation name; together with AS10128 they announce 72,448 IPv4 addresses.

ASNNameIPv4 addresses

AS18191AIRSERVICESAUS-AP - OPTUS CUSTOMER NETWORK AU65,536

AS4643TXU-AS-AP - Optus Customer Network AU1,792

AS4778BORAL-LIMITED-AP - Optus Customer Network AU1,024

AS24510HOLMESGLEN-INSTITUTE-OF-TAFE-AP - Optus Customer Network AU1,024

AS10150TENNET-AU-AP - Optus Customer Network AU512

AS9672WEST-AUSTRALIAN-NEWSPAPERS-AP - Optus Customer Network AU256

Similar-sized networks in Australia

ASNNameIPv4 addresses

AS133934#315 AUSIT-AS-AP - AUS IT SERVICES PTY LTD2,304

AS7722#316 TELPACIFIC-AS-AP - TELPACIFIC P/L2,304

AS9564#317 ANZ-BANK-AP - Australia and New Zealand Banking Group Limited2,304

AS10234#319 Zurich-Australia-AS-AP - Zurich Financial Services Australia2,304

AS17741#320 MEDOBJ01-AS-AP - Medical Objects Pty Ltd2,304

AS23760#321 XPEDITE-AS-AU - Xpedite Systems2,304

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources