AS131932 JR East Information Systems Company

JEIS-NET - JR East Information Systems Company · registered in Japan

IPv4 addresses327,6802 prefixes · 0.010% of announced IPv4

Rank in Japan#34largest network in JP by IPv4 space, of 724 · 0.20% of JP

Rank worldwide#759of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS131932 in ASN lookup Look up an IP in this network (157.71.0.1) All networks in Japan

IPv4 prefixes

All 2 prefixes, in address order.

157.71.0.0/16
157.72.0.0/14

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AS9371#35 SAKURA-C - SAKURA Internet Inc.297,216

AS18144#36 AS-ENECOM - Enecom,Inc.291,840

AS9597#37 CPI-NET - KDDI Web Communications Inc.276,736

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources