AS10150 TENNET-AU-AP Optus Customer Network

TENNET-AU-AP is registered under Optus's customer-network umbrella, but the holder behind it is Network Ten, the Australian free-to-air television broadcaster. The address block it originates, 203.8.18.0/23, is assigned to Network Ten Ltd under the netname TENNET-AU, and the AS record carries the broadcaster's Pyrmont, Sydney address.

What it's used for

A broadcaster's corporate and production connectivity. The AS announces 3 IPv4 prefixes totalling 512 addresses — the 203.8.18.0/23 plus its two component /24s announced separately — and no IPv6. Announcing a /23 alongside both halves is standard inbound traffic engineering: the covering route keeps reachability while the more-specifics let each half be steered independently, useful when a media organisation splits traffic between an office edge and a broadcast or file-delivery path.

Notable

This is an enterprise network, not a provider. 512 addresses and 1 observed BGP neighbour cannot be transit — a wholesale carrier peers with hundreds of ASes — and it is far too small for hosting. The Optus Customer Network label in the registry reflects that Optus administers the AS on its customer's behalf, an RFC 2270-style arrangement, so the traffic belongs to Network Ten rather than to Optus. Geolocate this space to the broadcaster's Sydney facilities, not to Optus subscribers.

Interesting

The handle is a good example of why holder names must be read carefully. TENNET here is Network Ten, an Australian TV network, and has nothing to do with TenneT, the Dutch-German electricity transmission operator of the same name.