210.237.128.0

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[ add '/e' at the end of command, e.g. 'whois -h whois.nic.ad.jp xxx/e'.      ]

Network Information:
a. [Network Number]             210.237.128.0/21
b. [Network Name]               DA-INTERNET
g. [Organization]               I-NET CORP.
m. [Administrative Contact]     JP00077267
n. [Technical Contact]          JP00077267
o. [Abuse]
p. [Nameserver]                 ns1.inetidc.jp
p. [Nameserver]                 ns2.inetidc.jp
[Assigned Date]                 2016/07/11
[Return Date]
[Last Update]                   2016/07/22 12:11:05(JST)

Less Specific Info.
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SoftBank Corp.
                     [Allocation]                             210.237.128.0/17

More Specific Info.
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No match!!