AS55803 Hostopia Australia Web Pty Ltd

HOSTOPIA-AU - Hostopia Australia Web Pty Ltd · registered in Australia

IPv4 addresses92,92845 prefixes · 0.003% of announced IPv4

Rank in Australia#39largest network in AU by IPv4 space, of 1,660 · 0.24% of AU

Rank worldwide#1,974of 79,396 networks with IPv4

IPv63 x /32 (196,608 x /48)3 prefixes

CountryAustralia1,688 ASNs registered there

Open AS55803 in ASN lookup Look up an IP in this network (27.123.30.1) All networks in Australia

IPv4 prefixes

All 45 prefixes, in address order.

27.123.30.0/24
49.156.24.0/21
101.0.64.0/21
101.0.72.0/22
101.0.76.0/24
101.0.77.0/24
101.0.78.0/23
101.0.80.0/20
101.0.96.0/22
101.0.100.0/23
101.0.102.0/23
101.0.104.0/21
101.0.120.0/21
103.12.4.0/22
103.80.103.0/24
103.141.249.0/24
103.208.216.0/22
103.237.108.0/22
103.250.20.0/22
110.173.128.0/19
111.67.0.0/19
111.118.160.0/20
116.90.0.0/19
116.90.40.0/21
125.214.64.0/20
137.59.248.0/22
163.53.248.0/22
175.41.40.0/22
182.160.128.0/18
202.4.224.0/20
202.130.44.0/22
203.10.76.0/24
203.16.60.0/23
203.19.59.0/24
203.24.117.0/24
203.98.70.0/23
203.98.73.0/24
203.98.75.0/24
203.98.83.0/24
203.98.84.0/24
203.98.86.0/24
203.98.88.0/24
203.98.91.0/24
203.98.92.0/23
223.27.0.0/19

IPv6 prefixes

All 3 prefixes.

2400:a600::/32
2401:fc00::/32
2402:9400::/32

Similar-sized networks in Australia

ASNNameIPv4 addresses

AS17477#36 MCT-SYDNEY - Macquarie Technology Operations Pty Limited108,800

AS45671#37 AS45671-NET-AU - Wholesale Services Provider104,960

AS139344#38 ACTGOV-EDU-AS-AP - ACT Government InTACT Group97,536

AS136518#40 WA-GOVERNMENT-AS-AP - WA Government project84,224

AS10148#41 UNIMELB-AS-AP - The University of Melbourne, Melbourne, Victoria78,336

AS9893#42 DSE-VIC-GOV-AS - Cenitex77,056

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