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AS131971 JPNIC-4Byte-ASBLOCK-AP

Japan AS131971-67 APNIC 5 IPv4 prefixes 7 IPv6 prefixes
IPv4 addresses
2,048
IPv6 /48 networks
65,536
RPKI
8 valid2 invalid2 no ROA
Peers and downstreams
0

Holder

AS name
AS131971-67
Description
JPNIC-4Byte-ASBLOCK-AP
Organisation
JPNIC-4Byte-ASBLOCK-AP
Abuse contact
Not published
Assigned
2011-08-03
Record last changed
2026-06-04 18:13 UTC

Upstream graph

Upstreams and their upstreams, from BGP paths
AS2497 Internet Initiative Japan Inc. AS2497 · JP Internet Initiative J… AS2518 BIGLOBE Inc. AS2518 · JP BIGLOBE Inc. AS2515 Japan Network Information Center AS2515 · JP Japan Network Informa… AS131971 JPNIC-4Byte-ASBLOCK-AP AS131971 · JP JPNIC-4Byte-ASBLOCK-AP

Network health

Grade D · 52/100
partly Prefixes covered by valid ROAs
8 of 12 announced prefixes are RPKI valid, 2 have no ROA.		 17/25
fail No RPKI invalid announcements
2 announced prefixes are RPKI invalid and dropped by networks that validate.		 0/10
pass Announces IPv6
7 IPv6 prefixes.		 15/15
partly More than one upstream
1 upstream seen in BGP.		 5/10
fail Working abuse contact
No abuse contact is published in the registry.		 0/15
fail Publishes a geofeed
No geofeed found. Without one, location databases have to guess.		 0/10
pass No prefixes smaller than /24 or /48
All prefixes are /24 (IPv4) or /48 (IPv6) or larger.		 10/10
pass Registry record maintained
Last changed 2026-06-04.		 5/5
Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.
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Routing changes

Last 30 days
No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS131971
as-name:        JPNIC-LAB
handle:         AS131971
remarks:        Japan Network Information Center
technical,administrative:JNIC1-AP (Japan Network Information Center) <hostmaster@nic.ad.jp>
technical,administrative:JP00000074
last changed:   2026-06-04T18:13:18Z
source:         APNIC (RDAP)