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IP Address Return Application Process
Japan Network Information Center
Superceded on: 22 October 1999
Valid till : 31 December 2000
※Outline of this document※
This document is valid from 29 January 2000.
This document describes the flow of the IP address return application process.
When addresses assigned to a user or member by a JPNIC member are no
longer used, they should be returned to JPNIC. This document explains
the procedure for returning IP address.
Refer to the following document for details on filling in the IP
Address Return Application Form:
"IP Address Return Application Form"
Please note that the name of each item in a form is described in
Japanese and there is no request form in English.
※Contents※
1. Return of assigned IP address
2. Request contact
3. Handling of request
4. Time limit till return
5. Qualifications for performing a return
6. Checking JPNIC database registration information
1. Return of assigned IP address
IP address is a limited shared resource, so when they are returned,
they should be used effectively in another way.
Please cooperate for the effective usage of IP address, which is a
shared resource on the Internet.
The addresses covered by the return procedure explained in this
document are IP address assigned by JPNIC, JNIC and the Network
Address Adjusting Committee.
When returning address assigned by the provider you connect to, please
return it to the provider.
If you return address due to a change in the provider you connect to
and you connect with a new JPNIC member consigned to address
assignment by JPNIC, please consult with the new JPNIC member first.
Refer to the following Member List to find out whether the new JPNIC
member is consigned to address assignment.
"IP Address Assignment JPNIC Member List"
2. Request contact
To return the assigned IP address, submit the IP Address Return
Request Form by E-mail or post. We can not accept submissions by
fax. E-mail is preferred.
When making a request by post, it takes longer to input the
information after the form reaches JPNIC, and so it will take a few
more days to process compared with a request by E-mail.
E-mail apply@ip.nic.ad.jp
Post Japan Network Information Center
Fuundo Bldg. 1F, 1-2 Kanda-Ogawamachi,
Chiyoda-ku, Tokyo, 101-0052, Japan
※If sending by post, write "IP Address Return Application Form
enclosed" on the envelope in red ink, enclose a stamped addressed
envelope, and send it to the address given above. The stamped addressed
envelope is used to send back the notice.
3. Handling of requests
Once a request is accepted, the period till the date of return is
regarded as the transit period/reservation period, and when the date
of return is reached, information related to the returned address is
deleted from the database of JPNIC and the assignment is cancelled.
Note that if there are any omissions or unclear descriptions in the
form, JPNIC can not accept the request.
If a false description or request is discovered, JPNIC will regard the
request as invalid.
4. Time limit till return
After a request for return is accepted, the addresses to be returned
are actually deleted from the JPNIC database at the end of the month
in 3 months time, unless otherwise specified.
If you wish a shorter return period than 3 months, fill in the date
you wish the addresses to be returned in [Return date] on the Request
Form.
5. Qualifications for performing a return
A person who is registered in the JPNIC database as an administrative
or technical contact for the addresses may make a request for the
provider-independent addresses to be returned. It is also possible for
the person who is registered in [DB registration] as being in charge
of DB registration in the JPNIC member information to make a request
in the place of the user.
In the case of a request to return a provider aggregatable address, we
can accept it only when it is sent from the E-mail address registered
in [DB registration] of JPNIC member information, to which the address
block is allocated.
Only those people stated above can make the application for return.
6. Checking JPNIC database registration information
JPNIC database registration information can be checked as follows:
Checking using whois:
whois -h whois.nic.ad.jp XXX.XXX.XXX.XXX
(IP Network address)
Searching using JPNIC's website at:
http://www.nic.ad.jp/jp/db/index.html
End of document
※Related documents※
"IP Address Return Application Form"
http://www.nic.ad.jp/en/regist/ip/translation/e-ip-addr-return-form.html
"IP Address Assignment JPNIC Member List"
ftp://ftp.nic.ad.jp/jpnic/ipaddress/address-block-list.txt
