Telstra addresses geolocate to the state capital serving the customer and are dependable for country-level decisions. Mobile customers share CGNAT addresses, so per-IP rate limits can affect many users at once.
Networks (ASN) / AS1221
AS1221 Telstra Corporation
Residential / mobile ISPAU
Australia's largest telecommunications provider (Telstra / BigPond), covering fixed NBN services and the Telstra mobile network.