IP address doesn't seem allocated (according to the IANA). This is what they had to say:

% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

inetnum:      240.0.0.0 - 240.255.255.255
organisation: Future use
status:       RESERVED

remarks:      Reserved for future use (formerly "Class E")
remarks:      [RFC1112].Reserved by protocol. For authoritative
remarks:      registration, seeiana-ipv4-special-registry.

changed:      1981-09
source:       IANA