AS142052 Mempool Space K.K. 🇯🇵 JP

Announcing 4 prefixes, seen at the RIS collectors.

IPv4 prefixes

512 (2 × /24)

IPv6 prefixes

2 × /48

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS142052
Name: Mempool Space K.K.
Organisation: The Mempool Open Source Project
Country: 🇯🇵 JP
RIR: APNIC
Allocated: 2021-04-08
Network type: Enterprise
Scope: Global
Peering policy: Open
IRR as-set: AS142052:AS-ALL
Website: https://mempool.space/
PeeringDB: net/26643

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

4 valid (100.0%) 0 invalid (0.0%) 0 no ROA (0.0%)

Whois

Fetched from whois.apnic.net

as-block:       AS141626 - AS142649
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2020-10-21T04:09:48Z
source:         APNIC

role:           APNIC Hostmaster
address:        PO Box 3646
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2026-08-26T00:40:00Z
source:         APNIC

aut-num:        AS142052
as-name:        MEMPOOLSPACEKK-AS-AP
descr:          Mempool Space K.K.
country:        JP
org:            ORG-MA114-AP
admin-c:        JM2327-AP
tech-c:         JM2327-AP
abuse-c:        AM3100-AP
mnt-lower:      MAINT-MEMPOOLSPACEKK-JP
mnt-routes:     MAINT-MEMPOOLSPACEKK-JP
mnt-by:         APNIC-HM
mnt-irt:        IRT-MEMPOOL-JP
last-modified:  2021-04-20T20:42:02Z
export:         to AS54415 announce AS142052:AS-ALL
source:         APNIC

irt:            IRT-MEMPOOL-JP
address:        MEMPOOL SPACE K.K.
address:        MORI TOWER 16F
address:        ROPPONGI HILLS
address:        MINATO, TOKYO
address:        JAPAN 106-6116
e-mail:         NETOPS@MEMPOOL.SPACE
abuse-mailbox:  NETABUSE@MEMPOOL.SPACE
admin-c:        JM2327-AP
tech-c:         JM2327-AP
auth:           # Filtered
remarks:        netabuse@mempool.space was validated on 2026-10-05
remarks:        netops@mempool.space was validated on 2026-10-05
mnt-by:         MAINT-MEMPOOLSPACEKK-JP
last-modified:  2026-10-23T07:57:59Z
source:         APNIC

organisation:   ORG-MA114-AP
org-name:       Mempool Space K.K.
org-type:       LIR
country:        JP
address:        MORI TOWER 16F
address:        ROPPONGI HILLS
phone:          +81-3-6772-3548
e-mail:         NETOPS@MEMPOOL.SPACE
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:18:29Z
source:         APNIC

role:           ABUSE MEMPOOLJP
country:        ZZ
address:        MEMPOOL SPACE K.K.
address:        MORI TOWER 16F
address:        ROPPONGI HILLS
address:        MINATO, TOKYO
address:        JAPAN 106-6116
phone:          +000000000
e-mail:         NETOPS@MEMPOOL.SPACE
admin-c:        JM2327-AP
tech-c:         JM2327-AP
nic-hdl:        AM3100-AP
remarks:        Generated from irt object IRT-MEMPOOL-JP
remarks:        netabuse@mempool.space was validated on 2026-10-05
remarks:        netops@mempool.space was validated on 2026-10-05
abuse-mailbox:  NETABUSE@MEMPOOL.SPACE
mnt-by:         APNIC-ABUSE
last-modified:  2026-10-05T01:00:16Z
source:         APNIC

person:         J MAURICE
address:        MEMPOOL SPACE K.K.
address:        MORI TOWER 16F
address:        ROPPONGI HILLS
address:        MINATO, TOKYO
country:        JP
phone:          +81-3-6772-3548
e-mail:         j@wiz.biz
nic-hdl:        JM2327-AP
mnt-by:         MAINT-WIZ-JP
last-modified:  2022-05-26T14:14:00Z
source:         APNIC