Telstra ASN, MCC/MNC and IP prefixes

Telstra is an Australian mobile network operator. The registry records no parent group for it. AS1221 carries its consumer mobile network, and the registry lists eight further Telstra ASNs covering global, managed-service and Belong broadband networks. Telstra's codes are MCC 505 with MNCs 01, 11, 39, 71 and 72.

The registry lists nine ASNs for Telstra. AS1221 is the principal network AS and carries the consumer network, announcing 282 IPv4 prefixes against 2 IPv6 prefixes at the last probe, with a PeeringDB record named Telstra Corporation Ltd and no network type set. AS4637, Telstra Global, announced 657 IPv4 and 104 IPv6 prefixes and is typed NSP in PeeringDB. Belong runs on AS135887, which announced 464 IPv4 and 6 IPv6 prefixes as a Cable/DSL/ISP network. AS132029 and AS133859 announced small amounts of space, and AS4632, AS135599, AS141886 and AS150689 announced none at the last probe.

An address whose origin ASN is AS1221 is routed by Telstra on its retail network. Telstra tags no address range as mobile-only, so AS1221 carries fixed and mobile customers together and the origin ASN by itself does not settle which one an address belongs to. AS4637, AS4632, AS135599, AS141886 and AS150689 sit on the international and managed-service side of the company rather than the handset network. AS132029, AS133859 and AS135887 have no documented role here, so an address on them could be mobile, fixed or enterprise.

Research note. AS1221 is Telstra's single principal network AS and carries the consumer network: APNIC whois shows the large Telstra consumer allocations 1.128.0.0/11 (netname TELSTRAINTERNET49-AU) and 101.160.0.0/11 (TELSTRAINTERNET50-AU) registered to Telstra Limited, and RIPEstat network-info returns origin AS1221 for both. Telstra does not tag any inetnum as mobile-only, so AS1221 carries fixed and mobile together. PeeringDB net for AS1221 is named 'Telstra Corporation Ltd', website https://www.telstra.com.au/, and publishes the geofeed https://geofeed.tools.telstra.net/geofeed.csv. Telstra's own coverage page states 'Check our predicted 4G and 5G mobile coverage.' No parent group asserted: Telstra Limited's investor pages do not state a parent on the pages fetched, so the field is left empty rather than guessed. Candidate ASNs 133931, 135052, 135083, 135313, 132292 and 149288 are registered to Telstra Limited / Telstra Corporation Limited but RIPEstat reports them as not announced, so they are omitted. Telstra's mobile-related MNCs per the ITU-region-5xx table: 01 (main, operational), 11 (Direct-to-Cell, shows as 'Telstra SpaceX'), 71 and 72 (operational), 39 (allocated to Telstra, status unknown). 505/99 is listed as Telstra (former One.Tel) with unknown status and was not included.