AS9723 ISEEK-AS-AP iseek Communications Pty Ltd

AS9723 (ISEEK-AS-AP) is held by iseek Communications Pty Ltd, a Brisbane-headquartered Australian network and data centre operator. iseek sells connectivity, colocation and cloud services to businesses, government and carriers, with a strong presence in Queensland and regional Australia.

What it's used for

The AS carries a substantial, fragmented inventory: 157 IPv4 prefixes covering 81,152 addresses, plus 2 IPv6 blocks (2407:6800::/32 and a /48), and — the number that defines its role — 34 observed BGP neighbours. Thirty-four adjacencies is far more than an enterprise or a campus (two or three) and far short of a wholesale backbone (hundreds). It is the signature of a regional provider: a handful of upstreams, a spread of IX peers, and a set of downstream customers running their own BGP.

The prefixes back that up. The largest aggregate is 202.83.64.0/19, with the rest in 123.200.0.0/17, 1.178.0.0/15 and 202.183.0.0/16 space carved into /20s through /24s. The reverse DNS is the clincher: it mixes iseek's own infrastructure (mxproc3.iseek.com.au) with third-party service names and, tellingly, other operators' customer-access naming such as dyn-…gazaltelecom.com.au and …dsl.earthlink.com.au. Space carrying another provider's DSL subscribers has been sold on, not consumed in-house.

Notable

• Heavy fragmentation with a modest address count is the classic shape of a B2B provider assigning small blocks per customer site, not a residential ISP handing out large dynamic pools.
• iseek runs colocation data centres alongside the network, so this single AS spans transit, access and hosting roles.
• The business was folded into a listed digital-infrastructure vehicle in a data centre consolidation deal, which is why the brand appears under different corporate parents depending on the source.