AS63802 Nippon Telegraph and Telephone East Corporation

MIKAKA-EAST - Nippon Telegraph and Telephone East Corporation · registered in Japan

IPv4 addresses131,07210 prefixes · 0.004% of announced IPv4

Rank in Japan#66largest network in JP by IPv4 space, of 724 · 0.08% of JP

Rank worldwide#1,614of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS63802 in ASN lookup Look up an IP in this network (133.131.0.1) All networks in Japan

IPv4 prefixes

All 10 prefixes, in address order.

133.131.0.0/20
133.131.16.0/22
133.131.20.0/24
133.131.21.0/24
133.131.22.0/23
133.131.24.0/21
133.131.32.0/19
133.131.64.0/18
133.131.128.0/17
133.132.0.0/16

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AS4729#65 JAEA - Japan Atomic Energy Agency131,072

AS7516#67 TOHKNET - TOHKnet Co.,Inc.119,040

AS24572#68 YAHOO-JP-AS-AP - Yahoo Japan118,784

AS3488#69 JAXAnet - Japan Aerospace Exploration Agency115,200

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