People have set up a refresh cron job and have had the same IPv6 allocation
for weeks to months:
*/5 * * * * root /sbin/rtsol WAN_INTERFACE

"I’m on 6 weeks with the same ipv6 block."

1)
   143.131.0.0/20 (ARIN)
    206.214.224.0/20 (ARIN)
    205.174.156.0/23 (ARIN)
    198.54.100.0/22 (ARIN)
    149.19.108.0/23 (ARIN)
    2605:59C0::/28 (ARIN)
    135.129.240.0/20 (ARIN)
    AS397763 (this ASN has never been seen on the Internet) [ARIN]
    2a0d:3340::/29 (RIPE)
    162.43.192.0/22 (RIPE)
    176.116.124.0/23 (RIPE)
    188.95.144.0/23 (RIPE)
    217.65.136.0/23 (RIPE)
    2406:2d40::/32 (APNIC)
    103.152.126.0/23 (APNIC)
    103.235.92.0/22 (APNIC)
    149.19.160.0/20 (LACNIC)
    2803:9810::/32 (LACNIC)
https://old.reddit.com/r/Starlink/comments/ioc4lc/starlink_internet_infrastructure/
<-- i keep this up to date

2) not sure

On Fri, Jun 11, 2021 at 6:52 AM Dave Taht <davet@teklibre.net> wrote:

> I am of course happy that with a real OS (linux/pfsense/openwrt) in front
> of the dishy that an dhcpv6-pd ipv6/56 can be had.
>
> … frustrated that the lease time is only 5 minutes and changes sometimes
> in under 24 hrs. Most OSes still don’t handle an ipv6 retraction all that
> well, and only apps like “mosh” can stay nailed up when the underlying ips
> change.
>
> while we’ve had ipv6 “source specific routing" and “bcp38" working in
> openwrt for 7+ years now, I doubt that’s working anywhere else.
>
> I got two questions:
>
> 1) How much ipv4 address space does starlink actually have? (and how tight
> is the market nowadays?)
>
> 2) how often does the external ipv4 address change?
> _______________________________________________
> Starlink mailing list
> Starlink@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/starlink
>