Home Prefix Lookup203.12.144.0/21

203.12.144.0/21 - Telstra Limited (AS1221)

IPv4APNICallocatedAS1221ASN-TELSTRA - Telstra Limited RPKI Valid

CIDR

203.12.144.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇦🇺 Australia

City

St Leonards

RIR

APNIC

Status

allocated

Allocated

1994-09-02

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
203.12.144.0/21	AS1221 ASN-TELSTRA - Telstra Limited	Valid	APNIC	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.12.144.0/21	AS1221	/21	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS1221	APNIC	MAINT-AU-TIAR-AP	2021-01-22
AS19905	APNIC	MAINT-AU-TIAR-AP	2022-09-12

More Specific Prefixes

Prefix	Country	Status
203.12.144.0/22	🇦🇺AU	assigned
203.12.145.200/29	🇦🇺AU	assigned
203.12.146.48/29	🇦🇺AU	assigned
203.12.146.120/29	🇦🇺AU	assigned
203.12.146.240/29	🇦🇺AU	assigned
203.12.147.48/29	🇦🇺AU	assigned
203.12.147.64/27	🇦🇺AU	assigned
203.12.147.96/28	🇦🇺AU	assigned
203.12.147.176/28	🇦🇺AU	assigned
203.12.148.0/22	🇦🇺AU	assigned
203.12.148.16/29	🇦🇺AU	assigned
203.12.150.176/29	🇦🇺AU	assigned

Transfer History

Registry transfers of 203.12.144.0/21, blocks inside it, or blocks containing it.

203.12.144.0/21Transfer · 2020-12-15
Telstra International Limited
🇭🇰 HK APNIC
→
Telstra Limited
🇦🇺 AU APNIC

Date	Resource	From	To	Type
2020-12-15	203.12.144.0/21	Telstra International Limited 🇭🇰 HK APNIC	Telstra Limited 🇦🇺 AU APNIC	Transfer

Origin ASN

AS1221

ASN-TELSTRA - Telstra Limited

Related Prefixes

More prefixes of AS1221

All prefixes of AS1221 →

Geolocation

Country🇦🇺AustraliaAU

RegionNew South Wales

CitySt Leonards

Coordinates-33.8234, 151.1940 ↗

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

GEThttps://api.ipctl.io/v1/prefix/203.12.144.0/21

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/203.12.144.0/21" | jq

External Links

RIPEstat