AS151847 Fastmail Pty Ltd

FASTMAILPTYLTD-AS-AP - Fastmail Pty Ltd · registered in Australia

IPv4 addresses1,0243 prefixes · <0.001% of announced IPv4

Rank in Australia#517largest network in AU by IPv4 space, of 1,660 · <0.01% of AU

Rank worldwide#35,070of 79,396 networks with IPv4

IPv616,384 x /483 prefixes

CountryAustralia1,688 ASNs registered there

Open AS151847 in ASN lookup Look up an IP in this network (103.168.172.1) All networks in Australia

IPv4 prefixes

All 3 prefixes, in address order.

103.168.172.0/24
202.12.124.0/24
204.75.18.0/23

IPv6 prefixes

All 3 prefixes.

2402:5d60::/35
2402:5d60:2000::/36
2402:5d60:4000::/36

Similar-sized networks in Australia

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AS150004#514 CTGPL-AS-AP - Check Networks1,024

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AS133898#516 FLIPTVPTYLIMITED-AS-AP - FLIP TV PTY LIMITED1,024

AS58869#518 RAY-AS-AP - Ray White (Real Estate) Pty Ltd1,024

AS149485#519 MONOCLOUDPTYLTD-AS-AP - MonoCloud Pty Ltd1,024

AS153315#520 UNIBEAM-AS-AP - Unibeam Networks Pty Ltd1,024

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