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AS17756Australia Post

AustraliaRegistryAPNIC

As of 29th September 2026, AS17756 (Australia Post), a network registered in Australia with APNIC, originates 24 IPv4 prefixes covering 138k addresses. By IPv4 address space that makes it the 1,787th-largest of the 79,607 networks we see originating IPv4, and the 32nd-largest of 1,661 in Australia. It is seen behind 2 upstream networks, most often AS32787 (Akamai (Prolexic)) and AS2764 (AAPT Limited). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

24

IPv6 prefixes

0

IPv4 addresses

138k

IPv6 /64s

0

Upstream graph

The networks AS17756 is seen behind, one and two hops out, drawn from real AS paths.

AS17756Toward the internet core
Upstream graph for AS17756: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS17756Australia PostThis networkAS2764AAPT LimitedAS32787Akamai (Prolexic)AS4826Vocus Connect Int…AS58511Swoop (Anycast Gl…AS1273Vodafone Group PLCAS32590Valve Corporation

Networks observed one and two hops upstream of AS17756 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS17756
NetworkCountryRelationshipPathsVantage pts
AS32787Akamai (Prolexic)USPeer1,72282
AS2764AAPT LimitedAUPeer24281

Prefixes

The largest blocks AS17756 originates, widest first.

Largest prefixes originated by AS17756
PrefixAddressesVisibility
155.144.0.0/1665.5k80/82
155.144.0.0/1732.8k82/82
155.144.128.0/1732.8k82/82
155.144.16.0/221k82/82
155.144.50.0/2351281/82
155.144.52.0/2351281/82
155.144.24.0/2425682/82
155.144.25.0/2425682/82
155.144.26.0/2425682/82
155.144.27.0/2425682/82

Routing health

How AS17756's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%24

Propagation

  • Globally propagated90% of full-feed peers or more100.0%24
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 24 prefixes

Recent changes

Announcements that started or stopped since 30th Aug 2026.

No announcement by AS17756 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.