<span name="st">6bone</span> Operators & Users,<br><br>Per RFC 3701, "<span name="st">6bone</span> (IPv6 Testing Address Allocation) <span name="st">Phaseout
</span>", 3FFE<br>prefixes only remain valid until June 6, 2006.<br><br>After June 6, 2006 no <span name="st">6bone</span> 3FFE prefixes, of any size/length, are to<br>be used on the Internet in any form.
<br><br>Note that on June 6, 2006 3FFE prefixes do not actively need to be<br>returned to the <span name="st">6bone</span> registry; 3FFE prefixes will simply be invalid<br>after that date and assumed to be totally under the control of the
<br>IANA.<br><br>Network operators may filter 3FFE prefixes on their borders to ensure<br>these prefixes are not misused.<br><br>Because of this, it is highly recommend that all <span name="st">6Bone</span>
participants<br>take early measures to find alternative IPv6 services, instead of<br>waiting until the last minute, in order to avoid service disruption.<br><br>Please take appropriate action now.<br><br><br>Regards,<br>
<br>Bob Fink