set enable_seqscan=off; CREATE TABLE test_inet ( i inet ); INSERT INTO test_inet VALUES ( '1.2.3.4/16' ), ( '1.2.4.4/16' ), ( '1.2.5.4/16' ), ( '1.2.6.4/16' ), ( '1.2.7.4/16' ), ( '1.2.8.4/16' ) ; CREATE INDEX idx_inet ON test_inet USING gin (i); SELECT * FROM test_inet WHERE i<'1.2.6.4/16'::inet ORDER BY i; i ------------ 1.2.3.4/16 1.2.4.4/16 1.2.5.4/16 (3 rows) SELECT * FROM test_inet WHERE i<='1.2.6.4/16'::inet ORDER BY i; i ------------ 1.2.3.4/16 1.2.4.4/16 1.2.5.4/16 1.2.6.4/16 (4 rows) SELECT * FROM test_inet WHERE i='1.2.6.4/16'::inet ORDER BY i; i ------------ 1.2.6.4/16 (1 row) SELECT * FROM test_inet WHERE i>='1.2.6.4/16'::inet ORDER BY i; i ------------ 1.2.6.4/16 1.2.7.4/16 1.2.8.4/16 (3 rows) SELECT * FROM test_inet WHERE i>'1.2.6.4/16'::inet ORDER BY i; i ------------ 1.2.7.4/16 1.2.8.4/16 (2 rows)