203.17.40.0/21 - Telstra Limited (AS1221)
CIDR
203.17.40.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇦🇺 Australia
City
Sydney
RIR
APNIC
Status
allocated
Allocated
1995-07-10
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.17.40.0/21 | AS1221 ASN-TELSTRA - Telstra Limited | Valid | APNIC | 2026-10-12 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 203.17.40.0/21 | AS1221 | /21 | apnic |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 203.17.40.0/22 | 🇦🇺AU | assigned | |
| 203.17.40.152/29 | 🇦🇺AU | assigned | |
| 203.17.40.208/29 | 🇦🇺AU | assigned | |
| 203.17.41.64/28 | 🇦🇺AU | assigned | |
| 203.17.41.80/29 | 🇦🇺AU | assigned | |
| 203.17.41.88/29 | 🇦🇺AU | assigned | |
| 203.17.41.96/28 | 🇦🇺AU | assigned | |
| 203.17.41.112/29 | 🇦🇺AU | assigned | |
| 203.17.44.0/22 | 🇦🇺AU | assigned |
Origin ASN
AS1221
ASN-TELSTRA - Telstra Limited
Related Prefixes
Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the APNIC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/203.17.40.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.17.40.0/21" | jq
External Links