I've never signed the legacy registration agreement for my IP space, either. I've had it since 1993, before ARIN existed.
Re:Next Generation MITnet
by stingraycharles on Thursday April 20, 2017 @12:09PM
(#14157952)
What did you do with it ?
(The fact that MIT refused to recognize ARIN's rights over the IP space was historically why ARIN never gave MIT an IPv6 prefix, or so I hear....)