AS9597 KDDI Web Communications Inc.

CPI-NET - KDDI Web Communications Inc. · registered in Japan

IPv4 addresses276,73620 prefixes · 0.009% of announced IPv4

Rank in Japan#37largest network in JP by IPv4 space, of 724 · 0.17% of JP

Rank worldwide#869of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryJapan745 ASNs registered there

Open AS9597 in ASN lookup Look up an IP in this network (27.34.128.1) All networks in Japan

IPv4 prefixes

All 20 prefixes, in address order.

27.34.128.0/19
27.34.160.0/21
103.197.12.0/22
110.50.192.0/19
115.146.0.0/18
117.20.96.0/20
118.82.64.0/18
122.200.192.0/18
150.60.0.0/16
158.199.128.0/17
180.222.72.0/21
180.222.80.0/20
180.235.224.0/19
192.50.199.0/24
194.91.0.0/16
202.74.16.0/20
202.133.112.0/20
202.164.224.0/19
211.9.192.0/19
219.100.168.0/22

IPv6 prefixes

All 1 prefix.

2402:3d00::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS131932#34 JEIS-NET - JR East Information Systems Company327,680

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

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

AS7506#38 GMO-I-R1 - GMO Internet, Inc.252,672

AS9351#39 ZLAN - ZTV CO.,LTD249,856

AS4673#40 INTERVIA - NTT DATA CORPORATION241,664

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