PHP + mySQL : reading 65K lines hangs mysql - php

Question

I'm developping a php application which is used to process IP adresses. Thus, I'm juggling with mysql tables containing up to 4 billion rows.
I have a script that currently needs to fetch 65536 adresses from this table and the mysql query fails to give a response via PHP or even via phpMyAdmin when I try to extract these 65K lines.
The table containing the IP Adresses has 3 indexes ( 1 unique, 2 primary ) which are supposed to help it go faster but I simply cannot get past having mysql give an associative array back to PHP in order to continue my data processing.
Any tips as to how to circumvent this problem ?
Thx in advance !
$request = new Request(DB_NAME);
$request->select = '*';
$request->from = Etherwan_Adressage_Ip::TABLE_NAME;
$request->where = Etherwan_Adressage_Ip_Ressource::PRIMARY_KEY." = '".$options->Ressource_ID."'";
$request->order = " inet_aton(IP) ";
$Compteur = 0;
$Liste = array();
$result = $request->exec('select');
for ($i=0 ; $i<$result['length'] ; $i+=$CIDR->Adresses_Totales){
$Possible = TRUE;
$Selected = FALSE;
for ($j=$i ; $j<$i+$CIDR->Adresses_Totales ; $j++){
if ($result[$j]['Date_Affectation'] != '0000-00-00 00:00:00'){
if (isset($options->Include)){
if ($options->Include->Type != $result[$j]['Type_Liaison'] || $options->Include->Liaison_ID != $result[$j]['Liaison_ID'] || str_replace('/', '', $options->CIDR) != $result[$j]['Bits']){
$Possible = FALSE;
} else {
$Selected = TRUE;
}
} else {
$Possible = FALSE;
}
break;
}
}
if ($Possible){
$Liste[$Compteur]['text'] = $result[$i]['IP'] . " / " . $result[$i+$CIDR->Adresses_Totales-1]['IP'];
$Liste[$Compteur]['value'] = $result[$i]['Ressource_ID'];
$Liste[$Compteur]['selected'] = $Selected;
$Liste_IP = array();
for ($j=$i ; $j<$i+$CIDR->Adresses_Totales ; $j++){
if ($result[$j]['Nom'] != ''){
$result[$j]['Dispo'] = 0;
} else {
$result[$j]['Dispo'] = 1;
}
$Liste_IP[] = $result[$j];
}
$Liste[$Compteur]['Liste_IP'] = $Liste_IP;
$Compteur++;
}
}
$Liste['maxLength'] = $Liste['length'] = $Compteur;
return $Liste;
Link to table indexes ( JPG )
Link to data sample ( JPG )