Home Prefix Lookup203.57.51.0/24

203.57.51.0/24 - MAMMOTHMEDIA AP Mammoth Media Pty (AS133159)

IPv4APNICannouncedAS133159MAMMOTHMEDIA-AS-AP Mammoth Media Pty Ltd RPKI Valid

CIDR

203.57.51.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇦🇺 Australia

City

Sydney

RIR

APNIC

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
203.57.51.0/24	AS133159 MAMMOTHMEDIA-AS-AP Mammoth Media Pty Ltd	Valid	APNIC	2026-10-11

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
203.57.50.0/23	AS133159 MAMMOTHMEDIA-AS-AP Mammoth Media Pty Ltd	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.57.50.0/23	AS133159	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS133159	APNIC	MAINT-MAMMOTHMEDIA-AU	2025-12-02

Transfer History

Registry transfers of 203.57.51.0/24, blocks inside it, or blocks containing it.

203.57.51.0/24Transfer · 2020-09-03
VOCUS PTY LTD
🇦🇺 AU APNIC
→
Mammoth Media Pty Ltd
🇦🇺 AU APNIC

Date	Resource	From	To	Type
2020-09-03	203.57.51.0/24	VOCUS PTY LTD 🇦🇺 AU APNIC	Mammoth Media Pty Ltd 🇦🇺 AU APNIC	Transfer

Origin ASN

AS133159

MAMMOTHMEDIA-AS-AP Mammoth Media Pty Ltd

Related Prefixes

Covering prefix

203.57.50.0/23AS133159

More prefixes of AS133159

All prefixes of AS133159 →

Geolocation

Country🇦🇺AustraliaAU

RegionNew South Wales

CitySydney

Coordinates-33.8688, 151.2090 ↗

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/203.57.51.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/203.57.51.0/24" | jq

External Links

RIPEstat