AS24290 — HEARTNET - Heart Network Co.,LTD

AS24290 announces 1 IPv4 prefixes covering 2,048 addresses and 0 IPv6 prefixes.

About this network

HEARTNET is the AS handle for Heart Network Co.,LTD.

What it's used for

• The address space carries residential access traffic, evidenced by reverse DNS entries like hearts174091255.hearts.ne.jp and hearts174093254.hearts.ne.jp.
• The network announces 2048 IPv4 addresses in a single prefix (203.174.88.0/21) with only 1 observed neighbour, a ratio typical of a local access or eyeball network rather than a transit provider.

Notable

• The RDAP registrant for the announced block is Japan Network Information Center (JPNIC), which is the standard registry for Japanese IP space and does not indicate a mismatch with the operator.
• The address inventory consists of a single contiguous /21 block, indicating a straightforward allocation without complex subdivision or multi-block aggregation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 203.174.88.0/21

Upstream networks

• AS9824 JCOM Co., Ltd.

Adjacent networks

• AS9824 JCOM Co., Ltd.

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-9824TRANSIT, AS-9824TRANSIT6, AS-EHIME-CATV, AS-GIGAINFRA, AS-IIJ, AS-IIJ6, AS-KDD, AS-KDDI6, AS-MESH-CUSTOMER:AS10010, AS-PACNET-DOWNSTREAM-JP, AS-STCN, AS-TOKAI, AS-VECTANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.