Home Prefix Lookup2a12:a303:100::/40

2a12:a303:100::/40 - XTOM JAPAN XTom Japan Corporation (AS3258)

IPv6RIPE NCCannouncedAS3258XTOM-JAPAN xTom Japan Corporation RPKI Valid

CIDR

2a12:a303:100::/40

IP Version

IPv6

Addresses

309.4Y

Mask

/40

Country

🇯🇵 Japan

City

Tokyo

RIR

RIPE NCC

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
2a12:a303:100::/40	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	Other IRRRIPE	2026-10-11

More-Specific Announcements

6 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
2a12:a303:100::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11
2a12:a303:101::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11
2a12:a303:102::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11
2a12:a303:103::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11
2a12:a303:11a::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11
2a12:a303:11e::/48	AS3258 XTOM-JAPAN xTom Japan Corporation	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
2a12:a300::/29	AS949	/48	ripe
2a12:a300::/29	AS3204	/48	ripe
2a12:a300::/29	AS3214	/48	ripe
2a12:a300::/29	AS3258	/48	ripe
2a12:a300::/29	AS4785	/128	ripe
2a12:a300::/29	AS6233	/48	ripe
2a12:a300::/29	AS8888	/48	ripe
2a12:a300::/29	AS9312	/48	ripe
2a12:a300::/29	AS23748	/128	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS3258	Other IRR	MAINT-AS9312	2026-09-28
AS3258	RIPE	xtom	2024-10-26

Transfer History

Registry transfers of 2a12:a303:100::/40, blocks inside it, or blocks containing it.

2a12:a300::/29Transfer · 2023-12-28
Cat Networks K.K.
RIPE NCC
→
xTom Japan Co., Ltd.
RIPE NCC

Date	Resource	From	To	Type
2023-12-28	2a12:a300::/29	Cat Networks K.K. RIPE NCC	xTom Japan Co., Ltd. RIPE NCC	Transfer

Origin ASN

AS3258

XTOM-JAPAN xTom Japan Corporation

Related Prefixes

More prefixes of AS3258

All prefixes of AS3258 →

Geolocation

Country🇯🇵JapanJP

CityTokyo

Abuse Contact

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 RIPE NCC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/2a12:a303:100::/40

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

curl -s "https://api.ipctl.io/v1/prefix/2a12:a303:100::/40" | jq

External Links

RIPEstat