AS18121 INCL Ishikawa Computer Center Co.,LTD.

🇯🇵

Org handle: A91A7381

Ishikawa Computer Center Co.,LTD

APNICallocated

Announced Prefixes (BGP)

7total

6 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)6,144

Announced (BGP)23,296

IPv6 Addresses

Allocated (RIR)7.9×10²⁸

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

allocated

Allocated

2002-03-21

Announced Prefixes

(BGP)7

Prefix	RPKI	IRR	Last Seen
103.241.208.0/23	No ROA	-	2026-10-09
103.241.208.0/24	No ROA	-	2026-10-09
180.94.192.0/20	Valid	Other IRR	2026-10-09
180.94.208.0/21	Valid	Other IRR	2026-10-09
202.222.32.0/19	Valid	Other IRR	2026-10-09
219.121.224.0/19	Valid	Other IRR	2026-10-09
2404:a00::/32	Valid	Other IRR	2026-10-09

(RIR)3

Prefix	Country	RIR	Status
180.94.192.0/20	🇯🇵 JP	APNIC	allocated
180.94.208.0/21	🇯🇵 JP	APNIC	allocated
2404:a00::/32	🇯🇵 JP	APNIC	allocated

(seen in AS paths)

Networks AS18121 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS18121 should publish an ASPA object
IPv4 transfers in the APNIC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/18121" | jq