Home Prefix Lookup203.192.128.0/18

203.192.128.0/18 - Telstra Global (AS4637)

IPv4APNICassignedAS4637ASN-TELSTRA-GLOBAL - Telstra Global RPKI Valid

CIDR

203.192.128.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇯🇵 Japan

City

Chiyoda City

RIR

APNIC

Status

assigned

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
203.192.128.0/18	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	APNICOther IRR	2026-10-12

More-Specific Announcements

7 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
203.192.130.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.136.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.141.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.150.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.151.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.156.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12
203.192.170.0/24	AS4637 ASN-TELSTRA-GLOBAL - Telstra Global	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.192.128.0/18	AS4637	/18	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4637	APNIC	MAINT-HK-TI	2023-08-22
AS4637	Other IRR	MAINT-AS4637	2023-11-13

More Specific Prefixes

Prefix	AS	Country	Status
203.192.128.0/19		🇯🇵JP	allocated
203.192.128.0/23		🇯🇵JP	assigned
203.192.130.0/24	AS4637	🇦🇺AU	assigned
203.192.131.0/24		🇯🇵JP	assigned
203.192.132.0/23		🇯🇵JP	assigned
203.192.134.0/24		🇭🇰HK	assigned
203.192.135.0/28		🇭🇰HK	assigned
203.192.135.16/29		🇭🇰HK	assigned
203.192.135.24/29		🇭🇰HK	assigned
203.192.135.48/28		🇭🇰HK	assigned
203.192.135.64/27		🇭🇰HK	assigned
203.192.135.96/27		🇭🇰HK	assigned
203.192.135.128/28		🇭🇰HK	assigned
203.192.135.168/29		🇭🇰HK	assigned
203.192.135.192/26		🇭🇰HK	assigned
203.192.136.0/24	AS4637	🇦🇺AU	assigned
203.192.137.0/24		🇭🇰HK	assigned
203.192.141.0/24	AS4637	🇦🇺AU	assigned
203.192.142.0/24		🇰🇷KR	assigned
203.192.143.0/24		🇹🇼TW	assigned
203.192.144.0/24		🇲🇾MY	assigned
203.192.145.0/24		🇭🇰HK	assigned
203.192.146.0/24		🇦🇺AU	assigned
203.192.148.0/28		🇰🇷KR	assigned
203.192.148.16/29		🇰🇷KR	assigned
203.192.148.64/29		🇰🇷KR	assigned
203.192.148.72/29		🇰🇷KR	assigned
203.192.148.80/28		🇰🇷KR	assigned
203.192.148.96/28		🇰🇷KR	assigned
203.192.148.112/29		🇰🇷KR	assigned
203.192.148.120/29		🇰🇷KR	assigned
203.192.148.152/29		🇰🇷KR	assigned
203.192.148.160/28		🇰🇷KR	assigned
203.192.148.176/28		🇰🇷KR	assigned
203.192.149.0/24		🇯🇵JP	assigned
203.192.150.0/24	AS4637	🇯🇵JP	assigned
203.192.151.0/24	AS4637	🇵🇭PH	assigned
203.192.152.0/24		🇹🇼TW	assigned
203.192.152.168/29		🇵🇭PH	assigned
203.192.153.0/24		🇭🇰HK	assigned
203.192.154.0/24		🇸🇬SG	assigned
203.192.157.32/27		🇰🇷KR	assigned
203.192.157.64/28		🇰🇷KR	assigned
203.192.157.96/28		🇰🇷KR	assigned
203.192.157.112/28		🇰🇷KR	assigned
203.192.157.128/26		🇰🇷KR	assigned
203.192.158.0/23		🇮🇩ID	assigned
203.192.160.0/19		🇯🇵JP	allocated
203.192.160.0/24		🇵🇭PH	assigned
203.192.163.0/24		🇸🇬SG	assigned
203.192.164.0/24		🇰🇷KR	assigned
203.192.165.0/24		🇰🇷KR	assigned
203.192.167.0/24		🇦🇺AU	assigned
203.192.169.0/24		🇸🇬SG	assigned
203.192.170.0/24	AS4637	🇹🇼TW	assigned
203.192.182.0/24		🇯🇵JP	assigned
203.192.182.0/25		🇰🇷KR	assigned
203.192.189.0/24		🇸🇬SG	assigned

Origin ASN

AS4637

ASN-TELSTRA-GLOBAL - Telstra Global

Related Prefixes

More prefixes of AS4637

All prefixes of AS4637 →

Geolocation

Country🇯🇵JapanJP

RegionTokyo

CityChiyoda City

Coordinates35.6940, 139.7540 ↗

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/203.192.128.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/203.192.128.0/18" | jq

External Links

RIPEstat