'nic whois warning

>24.in-addr.arpa has never been delegated.

What do you mean? Address space has been assigned by ARIN:

There is no 24.in-addr.arpa zone. There are specific delegations
underneith it.

Ok, I understand now. I first read you to mean 24 was not assigned, as
opposed to not delegated. Sorry for the confusion.

There are no nameservers for this zone, as demonstrated by your
nslookup query.

Doh! This is what I was looking for: (I knew there were people using
24.something in boston)

set type=soa

Server: starship.av8.com

        origin = ns1.ne.mediaone.net
        mail addr = hostmaster.mediaone.net
        serial = 1999010513
        refresh = 3600 (1 hour)
        retry = 900 (15 mins)
        expire = 864000 (10 days)
        minimum ttl = 1800 (30 mins)
0.128.24.in-addr.arpa nameserver = ns1.ne.mediaone.net
0.128.24.in-addr.arpa nameserver = ns2.ne.mediaone.net
0.128.24.in-addr.arpa nameserver = ns1.mediaone.net
0.128.24.in-addr.arpa nameserver = ns2.mediaone.net
ns1.ne.mediaone.net internet address =
ns2.ne.mediaone.net internet address =
ns1.mediaone.net internet address =
ns2.mediaone.net internet address =

Also, ARIN records the registrations made by the IANA. This was
the process as of four months ago, which was up to the point
that Jon left us. Josh has told me that the IANA still approves
every 24.in-addr.arpa delegation since this is the range for
cable deployment and cable is not reserved for the ARIN service
area. (yes cable does exist in Europe and Asia !)

I see. That makes more sense now.