AS1221 Telstra Corporation Ltd
isp · based in Australia · IPLogs default verdict: Residential traffic
- ASN
- AS1221
- Name
- Telstra Corporation Ltd
- Category
- isp
- Country
- Australia
- IPLogs verdict
- Residential traffic
- Proxy backbone
- No
About Telstra Corporation Ltd
Telstra — largest Australian ISP and mobile carrier.
How IPLogs classifies AS1221
When the detection engine sees an IP that routes through AS1221, it checks three lists: (1) the curated VPN-provider ASN list, (2) the datacenter / hosting ASN list, and (3) the trusted CDN allowlist. Matches produce one of vpn_asn, dc_ip, or no flag respectively. Keywords in the org name (e.g. "vpn", "proxy", "anonym") may also trigger vpn_org_keyword even for unknown ASNs.
Use the ASN as a shortcut when you want to block a whole hosting provider at the edge rather than maintaining a per-IP list.
Authoritative sources for AS1221
Third-party registries where you can verify the announcements, peer relationships, and WHOIS registration for this ASN.
Related ASNs
Other isp ASNs in Australia catalogued by IPLogs.
Frequently asked questions about AS1221
+Is AS1221 (Telstra Corporation Ltd) a VPN, datacenter, or residential network?
IPLogs classifies Telstra Corporation Ltd (AS1221) as a residential ISP network based in Australia. The default verdict for any IP that routes through this ASN is "Residential traffic".
+Who operates AS1221 and where is it registered?
Telstra Corporation Ltd (AS1221) operates in Australia.
+How do I check or block AS1221 traffic?
Send any suspect IP to the IPLogs API — POST https://iplogs.com/v1/check with body {"ip":"<ip>"} — and the response reports the originating ASN plus whether it matched the VPN, datacenter, or CDN lists. To block a whole hosting network at the edge, filter on AS1221 instead of maintaining a per-IP list. Copy-paste recipes for Cloudflare WAF, Nginx, and Stripe Radar are at /guides/block-vpn-traffic.