49.253.84.156はネットワーク名もEACCESSになってるだろ
何でワイモバイルと言い続けてるんだ？

http://whois.nic.ad.jp/cgi-bin/whois_gw

[ JPNIC database provides information regarding IP address and ASN. Its use ]
[ is restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.nic.ad.jp help'. To only display English output, ]
[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'. ]

Network Information: [ネットワーク情報]
a. [IPネットワークアドレス] 49.253.84.0/24
b. [ネットワーク名] EACCESS