wp-loop-filter-by-numerical-taxonomy-term.php

$args = array(
	'post_type' => 'post',
	'tax_query' => array(
		array(
			'taxonomy' => 'your_taxonomy_slug'
		),
	),
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
	while ( $query->have_posts() ) : $query->the_post();
    
    $terms = wp_get_post_terms( $post->ID, 'your_taxonomy_slug', 'names' );
    
    $number = absint( $terms[0] ); // Assuming you will only add one number per post so first array item will be correct
    
    if( $number > 100 && $number < 4000 ){
    
    //Do stuf with posts in range 100 - 4000
    
    }
  endwhile;