AS136572 Office of The Chief Information Officer (OCIO)

TOOTCIO-AS-AP - Office of The Chief Information Officer (OCIO) · registered in Australia

IPv4 addresses67,84036 prefixes · 0.002% of announced IPv4

Rank in Australia#49largest network in AU by IPv4 space, of 1,660 · 0.17% of AU

Rank worldwide#2,538of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryAustralia1,688 ASNs registered there

Open AS136572 in ASN lookup Look up an IP in this network (143.216.0.1) All networks in Australia

IPv4 prefixes

All 36 prefixes, in address order.

143.216.0.0/19
143.216.32.0/22
143.216.36.0/23
143.216.38.0/24
143.216.39.0/24
143.216.40.0/21
143.216.48.0/20
143.216.64.0/21
143.216.72.0/22
143.216.76.0/23
143.216.78.0/23
143.216.80.0/24
143.216.81.0/24
143.216.82.0/23
143.216.84.0/22
143.216.88.0/21
143.216.96.0/22
143.216.100.0/23
143.216.102.0/24
143.216.103.0/24
143.216.104.0/21
143.216.112.0/20
143.216.128.0/18
143.216.192.0/20
143.216.208.0/23
143.216.211.0/24
143.216.213.0/24
143.216.214.0/23
143.216.216.0/21
143.216.224.0/19
192.52.72.0/23
203.1.252.0/24
203.6.146.0/23
203.17.193.0/24
203.25.22.0/24
203.26.120.0/22

Similar-sized networks in Australia

ASNNameIPv4 addresses

AS17983#46 COLES-AU-AS-AP - Coles Supermarkets Australia Pty Ltd73,728

AS134111#47 CSIRO-PAWSEY-AS-AP - Commonwealth Scientific and Industrial Research Organisation69,888

AS136247#48 VICUNI-AS-AP - Victoria University67,840

AS58698#50 UOW-AU - 1 northfields av67,072

AS24437#51 UWA-AS-AP - University of Western Australia66,816

AS24014#52 BONDUNI-AS-AP - Bond University Limited66,304

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