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{| {{table}}{| {{table}} border=01 cellspacing=0 cellpadding=5| align="center" style="background:#f0f0f0;"|'''1.0.0.0'''| align="center" style="background:#f0f0f0;"|'''IP A Block'''| align="center" style="background:#f0f0f0;"|'''*IANA*'''| align="center" style="background:#f0f0f0;"|'''Allocation by Reference'''|-| 1.0.0.0||*IANA*|-| According to the RFCs, valid Internet IPs range up to '''223.255.255.255'''. Higher addresses are used for multicasting, or, things like Universal Plug and Play (UPnP).