HomeASN LookupAS1221

AS1221 ASN-TELSTRA - Telstra Limited

🇦🇺

Org handle: ORG-TC6-AP

Telstra Limited

APNICallocatedASPA Published
Announced Prefixes (BGP)
288total
286 IPv42 IPv6
IPv4 Addresses
Allocated (RIR)13.0M
Announced (BGP)13.4M
IPv6 Addresses
Allocated (RIR)3.2×10³²
Announced (BGP)3.2×10³²
Prefix Limit (IPv4)
20,000
Prefix Limit (IPv6)
10
Country
🇦🇺 AU
RIR
APNIC
Status
allocated
Allocated
2000-01-31

Routing hygiene

Score 48/100 · Medium risk
RPKI ROA coverage
43.8%
2 prefixes RPKI invalid
IRR route objects
68.3%
45 prefixes registered for another origin
Hijack signals
3
1 announced against others' ROAs, 2 own announced by others
Upstreams
2
diversity 1/100
  • 56% of announced prefixes (163 of 290) have no valid ROA, 2 of them RPKI invalid
  • 38 prefixes registered in IRR route objects for another active network and not authorized by a ROA
  • Routes concentrated on one upstream (100% of routes)
  • Announces 1 prefix that RPKI assigns to another network (possible hijack or misconfiguration)
  • 32% of announced prefixes (92 of 290) have no IRR route object for this ASN

Based on 290 announced prefixes, updated daily (2026-10-21). How the score works · RPKI explained

Listed on the threat map (2026-10-21)

Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.

Announced Prefixes

(BGP)288
|
Prefix
RPKI
IRR
Last Seen
1.120.0.0/13
 Valid
APNIC
-
1.128.0.0/11
 Valid
APNIC
-
58.160.0.0/12
 Valid
APNIC
-
60.224.0.0/13
 Valid
APNIC
-
61.8.0.0/19
 Valid
APNIC
-
61.9.128.0/17
 Valid
APNIC
-
66.111.164.0/24
No ROA--
66.111.166.0/24
No ROA--
66.111.168.0/24
No ROA--
66.111.171.0/24
No ROA--
1-10 of 288
1 / 29

Allocated Prefixes

(RIR)144
Prefix
Country
RIR
Status
1.120.0.0/13🇦🇺 AUAPNICallocated
1.128.0.0/11🇦🇺 AUAPNICallocated
58.160.0.0/12🇦🇺 AUAPNICassigned
60.224.0.0/13🇦🇺 AUAPNICallocated
61.8.0.0/19🇦🇺 AUAPNICallocated
61.9.128.0/17🇦🇺 AUAPNICallocated
101.103.0.0/16🇦🇺 AUAPNICallocated
101.160.0.0/11🇦🇺 AUAPNICallocated
103.58.212.0/24🇦🇺 AUAPNICassigned
103.78.241.0/24🇦🇺 AUAPNICassigned
1-10 of 144
1 / 15

All 288 announced prefixes of AS1221 →

Upstream Providers(1)

ASNName
AS4637🇭🇰ASN-TELSTRA-GLOBAL - Telstra Global

Downstream Customers(11)

ASNName
AS4608🇦🇺APNIC-SERVICES - Asia Pacific Network Information Centre
AS4632🇦🇺TMNS-AS - Telstra Managed Network Services
AS9912🇦🇺VOCUS-AU - Vocus Australia
AS45163🇦🇺APNICRANDNET-TUI2-AU - TUI experiment
AS45437🇦🇺RWTS-AS-AP - Real World - The Core
AS63919🇦🇺JETP-AU - Jeanneret Electrical Technologies P/L
AS132528🇦🇺DIGICELAUSPTYLTD-AS-AP - DIGICEL (AUS) PTY LTD
AS135289🇦🇺JAPL-AS-AP - JBS Australia Pty Ltd
AS135887🇦🇺TELSTRA-BELONG-AP - Belong (Telstra Limited)
AS139700🇦🇺CAPRICORNSPACE-AS-AP - Capricorn Space Pty Ltd
AS153643🇦🇺CHW-AS-AP - Central Highlands Region Water Corporation

BGP Neighbours

(seen in AS paths)

Upstreams (2)

Networks AS1221 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS4637Telstra Global289
  • AS58511Anycast Global Backbone1

Downstreams (100 of 246)

Networks whose own prefixes AS1221 passes on: usually its customers.

  • AS16509Amazon.Com552
  • AS135887Belong (Telstra Limited)471
  • AS4764Aussie Broadband282
  • AS20940AKAMAI ASN1 Akamai International B.V127
  • AS45763Opticomm Pty69
  • AS10235National Australia Bank Limited62
  • AS13335Cloudflare47
  • AS20473The Constant Company47
  • AS31898Oracle Corporation47
  • AS17559Spectrums Core Network35
  • AS9893Cenitex24
  • AS54113Fastly24
  • AS36351IBM Cloud22
  • AS36692Cisco OpenDNS22
  • AS4608Asia Pacific Network Information Centre20
  • AS139049GIGACOMM PTY18
  • AS3360DXC US Latin America Corporation16
  • AS18055Department Of Human Services16
  • AS132029Telstra Limited16
  • AS53813ZSCALER15
  • AS37978Networking Tasmania14
  • AS13445Cisco Webex13
  • AS137945NUTRIEN (CANADA) HOLDINGS ULC APAC11
  • AS21859Zenlayer10
  • AS24313NSW Department Of Education10
  • AS9880NextGen.Net Pty , North Sydney9
  • AS15830Equinix (EMEA) Acquisition Enterprises B.V9
  • AS23943Hyperspike Pty9
  • AS38260Transaction Network Services For Asia Pac9
  • AS38714E Vision Internet9
  • AS56294VMvault Pty9
  • AS9342Australian Broadcasting Corporation8
  • AS23918NTT Australia Solutions Pty8
  • AS30103Zoom Video Communications8
  • AS55478Level 15, 100 Arthur Street8
  • AS136988LEASEWEB AUSTRALIA PTY LIMITED8
  • AS9507NextHop Pty7
  • AS32787Akamai Technologies7
  • AS56105Department Of Education And Training Victoria7
  • AS135879Hyundai Motor Company Australia Pty7
  • AS137470Iluka Resources Limited7
  • AS198949Radware7
  • AS109CISCO SYSTEMS6
  • AS3573Accenture LLP6
  • AS38903Australian Unity Limited6
  • AS55542Roads And Maritime Services6
  • AS639565G NETWORK OPERATIONS PTY6
  • AS138186Tasmanian Networks Pty6
  • AS18191OPTUS CUSTOMER NETWORK5
  • AS24017Foxtel Management Pty5
  • AS34414NOKIA APAC Nokia Oyj5
  • AS38813Emantra Pty5
  • AS49915MEGAPORT (UK) Limited5
  • AS63919Jeanneret Electrical Technologies P/L5
  • AS152175Sat One Global Pty5
  • AS4825Metcash Trading4
  • AS9544Clarenston T/A Preferred Internet Provider4
  • AS17158Datto4
  • AS23344Disney Worldwide Services4
  • AS24463Pacific National Services Pty4
  • AS38066Department Of Environment And Climate Change4
  • AS45931FetchTV Pty4
  • AS58869Ray White (Real Estate) Pty4
  • AS132321NORTHERN TERRITORY OF AUSTRALIA4
  • AS132370Civica Pty Limited4
  • AS132484MUFG PENSION & MARKET SERVICES HOLDINGS LIMITED4
  • AS137204The Bend Motorsport Park4
  • AS139345Hyve Managed Hosting4
  • AS139819RAA INSURANCE LIMITED4
  • AS153589VOLVO GROUP KOREA4
  • AS399361Alcoa USA4
  • AS10310Yahoo Holdings3
  • AS12041Afilias3
  • AS18165ResMed Dual Internet Gateway3
  • AS18361ASX Operations Pty3
  • AS38302Unisys Australia3
  • AS38858Somerville3
  • AS45589AUSGRID3
  • AS45949McMillan Shakespeare Australia Pty3
  • AS59206CEnet3
  • AS60068CDN77 Datacamp Limited3
  • AS131999Lateral Plains Pty3
  • AS132257Area9 IT Solutions3
  • AS132847Network Solutions Group Pty3
  • AS133934AUS IT SERVICES PTY3
  • AS135530Acronis Asia Pte3
  • AS136522TAFE NSW3
  • AS136585LEIDOS AUSTRALIA PTY LIMITED3
  • AS138209Programmed Maintenance Services Limited3
  • AS152588Country Road Group Pty3
  • AS153814Woolworths Group Limited3
  • AS7486News Digital Media Pty Limited2
  • AS9426Westpac Bank2
  • AS9912Vocus Australia2
  • AS11019HAProxy Technologies2
  • AS13014HEWLETT PACKARD ENTERPRISE APJ Hewlett Packard France S.A.S2
  • AS16466Avaya2
  • AS18431Department Of Foreign Affairs And Trade2
  • AS20464HP2
  • AS22604Disney Streaming Services2

Other adjacent networks (10)

Adjacent to AS1221 in the transit part of AS paths: peers, providers or customers.

  • AS132528DIGICEL (AUS) PTY18
  • AS45437Real World The Core15
  • AS7474SingTel Optus Pty12
  • AS38561NTT Australia Solutions Pty8
  • AS35280F5 Networks SARL5
  • AS49544I3Dnet I3D.Net B.V4
  • AS59267Intuit Technologies Pty4
  • AS4826Vocus Connect International Backbone1
  • AS38880Micron21 Datacentre Pty1
  • AS139745Downer EDI Limited1
ASPA
Published1 upstream, 11 downstreams
Authorized Upstream Providers
AS4637
Expires 2026-10-31
Listed as Upstream Provider by
11 ASNs
View full ASPA details →
External Links
APNIC WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/1221

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/1221" | jq