function is_google_ip($ip) { // updated: 2024-09-19  
  // Convert IP string to number
  if (!is_string($ip)) {
    $bytes = explode('.', $ip);
    $ip = 0;
    foreach ($bytes as $n) {
      $ip <<= 8;
      $ip |= (int)$n;
    }
  }
  // Check rules
  switch ($ip & 4294967264) {
    case 3232892160:
    case 3232892416:
    case 571888896:
    case 1123631104:
    case 1123631232:
    case 1123631264:
    case 1123631328:
    case 1123631136:
    case 1123631168:
    case 1123631200:
    case 1123631360:
    case 1123631520:
    case 1123631552:
    case 1123631584:
    case 1123631392:
    case 1123631424:
    case 1123631456:
    case 1123631616:
    case 1123631776:
    case 1123631808:
    case 1123631648:
    case 1123631680:
    case 1123631712:
    case 1123632128:
    case 1123632160:
    case 1123632192:
    case 1123632384:
    case 1123632512:
    case 1123632544:
    case 1123632576:
    case 1123632608:
    case 1123632416:
    case 1123632448:
    case 1123632480:
    case 1123632640:
    case 1123632768:
    case 1123632800:
    case 1123632832:
    case 1123632864:
    case 1123632672:
    case 1123632704:
    case 1123632736:
    case 1123632896:
    case 1123633024:
    case 1123633056:
    case 1123633088:
    case 1123633120:
    case 1123632928:
    case 1123632960:
    case 1123632992:
    case 1123633152:
    case 1123633280:
    case 1123633312:
    case 1123633344:
    case 1123633376:
    case 1123633184:
    case 1123633216:
    case 1123633248:
    case 1123633408:
    case 1123633536:
    case 1123633568:
    case 1123633600:
    case 1123633632:
    case 1123633440:
    case 1123633472:
    case 1123633504:
    case 1123633664:
    case 1123633792:
    case 1123633696:
    case 1123633728:
    case 1123633760:
    case 1123633920:
    case 1123634048:
    case 1123634080:
    case 1123634112:
    case 1123634144:
    case 1123633952:
    case 1123633984:
    case 1123634016:
    case 1123634176:
    case 1123634304:
    case 1123634336:
    case 1123634368:
    case 1123634400:
    case 1123634208:
    case 1123634240:
    case 1123634272:
    case 1123634432:
    case 1123634560:
    case 1123634592:
    case 1123634624:
    case 1123634656:
    case 1123634464:
    case 1123634496:
    case 1123634528:
    case 1123634688:
    case 1123634720:
    case 1123634944:
    case 1123635072:
    case 1123635104:
    case 1123635136:
    case 1123635168:
    case 1123634976:
    case 1123635008:
    case 1123635040:
    case 1823539712:
    case 3232895232:
    case 3512069632:
    case 3512069760:
    case 3512069792:
    case 3512069824:
    case 3512069856:
    case 3512069664:
    case 3512069696:
    case 3512069728:
    case 1123636992:
    case 1123637120:
    case 1123637152:
    case 1123637184:
    case 1123637216:
    case 1123637024:
    case 1123637056:
    case 1123637088:
    case 1123637504:
    case 1123637632:
    case 1123637664:
    case 1123637728:
    case 1123637536:
    case 1123637568:
    case 1123637600:
    case 1123637760:
    case 1123637888:
    case 1123637920:
    case 1123637952:
    case 1123637984:
    case 1123637792:
    case 1123637856:
    case 1123638016:
    case 1123638144:
    case 1123638176:
    case 1123638208:
    case 1123638240:
    case 1123638048:
    case 1123638080:
    case 1123638112:
    case 1123638272:
    case 1123638400:
    case 1123638432:
    case 1123638464:
    case 1123638304:
    case 1123638368:
    case 1208928000:
    case 1208928128:
    case 1208928160:
    case 1208928192:
    case 1208928224:
    case 1208928032:
    case 1208928064:
    case 1208928096:
    case 1249743872:
    case 1249744000:
    case 1249744032:
    case 1249744064:
    case 1249744096:
    case 1249743904:
    case 1249743936:
    case 1249743968:
    case 1249744128:
    case 1249744256:
    case 1249744288:
    case 1249744320:
    case 1249744352:
    case 1249744160:
    case 1249744192:
    case 1249744224:
    case 1249744384:
    case 1249744416:
    case 1249744448:
    case 1249744640:
    case 1249744768:
    case 1249744800:
    case 1249744832:
    case 1249744864:
    case 1249744672:
    case 1249744704:
    case 1249744736:
    case 1249761280:
    case 1249761408:
    case 1249761440:
    case 1249761472:
    case 1249761504:
    case 1249761312:
    case 1249761344:
    case 1249761376:
    case 1249761536:
    case 1249761664:
    case 1249761568:
    case 1249761600:
    case 1249761632:
    case 1249761792:
    case 1249761920:
    case 1249761952:
    case 1249761984:
    case 1249762016:
    case 1249761824:
    case 1249761856:
    case 1249761888:
    case 1249762048:
    case 1249762080:
      return true;
  }
  switch ($ip & 4294967280) {
    case 577025632:
    case 577057424:
    case 578223616:
    case 578175488:
    case 578728544:
    case 580032144:
    case 580087440:
    case 580340368:
    case 580399680:
    case 580547216:
    case 580608544:
    case 581243568:
    case 581935168:
    case 581992976:
    case 574640704:
    case 574747248:
    case 575681104:
    case 576242176:
    case 576260688:
    case 576308816:
    case 576758320:
    case 603452400:
      return true;
  }
  return false;
}