AS7511 SYNAPSE Co.,Ltd.

SYNAPSE - SYNAPSE Co.,Ltd. · registered in Japan

IPv4 addresses78,84817 prefixes · 0.003% of announced IPv4

Rank in Japan#83largest network in JP by IPv4 space, of 724 · 0.05% of JP

Rank worldwide#2,212of 79,396 networks with IPv4

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

CountryJapan745 ASNs registered there

Open AS7511 in ASN lookup Look up an IP in this network (101.50.60.1) All networks in Japan

IPv4 prefixes

All 17 prefixes, in address order.

101.50.60.0/22
101.53.104.0/21
103.53.120.0/22
103.208.96.0/22
110.92.32.0/19
124.146.64.0/18
202.79.0.0/22
202.79.8.0/21
202.95.32.0/19
202.208.160.0/19
203.111.192.0/20
203.140.160.0/20
203.145.96.0/20
203.147.112.0/20
210.146.80.0/20
210.237.32.0/19
219.100.8.0/22

IPv6 prefixes

All 1 prefix.

2401:c800::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS17514#80 AICS - Otsuka Corp.83,968

AS9600#81 SONYTELECOM - So-net Corporation82,944

AS9466#82 UUNET-JP-AP - UUNET Japan Limited82,944

AS9622#84 KCT - Kurashiki Cable TV78,848

AS18260#85 e-catv - EHIME CATV CO.,LTD.78,592

AS38628#86 WINK-NET - HIMEJI CABLE TELEVISION CORPORATION77,824

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