set enable_seqscan=off; CREATE TABLE test_cidr ( i cidr ); INSERT INTO test_cidr VALUES ( '1.2.3.4' ), ( '1.2.4.4' ), ( '1.2.5.4' ), ( '1.2.6.4' ), ( '1.2.7.4' ), ( '1.2.8.4' ) ; CREATE INDEX idx_cidr ON test_cidr USING gin (i); SELECT * FROM test_cidr WHERE i<'1.2.6.4'::cidr ORDER BY i; SELECT * FROM test_cidr WHERE i<='1.2.6.4'::cidr ORDER BY i; SELECT * FROM test_cidr WHERE i='1.2.6.4'::cidr ORDER BY i; SELECT * FROM test_cidr WHERE i>='1.2.6.4'::cidr ORDER BY i; SELECT * FROM test_cidr WHERE i>'1.2.6.4'::cidr ORDER BY i;