Robtex

Up: 222.123.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 222.123.0.0/23
Down right: 222.123.2.0/23

IP	Type	Hostname
222.123.0.0	PTR	222.123.0.0.static-range.ttt.co.th
222.123.0.2	PTR	222.123.0.2.static-range.ttt.co.th
222.123.0.12	PTR	222.123.0.12.static-range.ttt.co.th
222.123.0.22	PTR	222.123.0.22.static-range.ttt.co.th
222.123.0.28	PTR	222.123.0.28.static-range.ttt.co.th
222.123.0.29	PTR	222.123.0.29.static-range.ttt.co.th
222.123.0.34	PTR	222.123.0.34.static-range.ttt.co.th
222.123.0.36	PTR	222.123.0.36.static-range.ttt.co.th
222.123.0.37	PTR	222.123.0.37.static-range.ttt.co.th
222.123.0.41	PTR	222.123.0.41.static-range.ttt.co.th
222.123.0.46	PTR	222.123.0.46.static-range.ttt.co.th
222.123.0.60	PTR	222.123.0.60.static-range.ttt.co.th
222.123.0.62	PTR	222.123.0.62.static-range.ttt.co.th
222.123.0.64	PTR	222.123.0.64.static-range.ttt.co.th
222.123.0.65	PTR	222.123.0.65.static-range.ttt.co.th
222.123.0.66	PTR	222.123.0.66.static-range.ttt.co.th
222.123.0.67	PTR	222.123.0.67.static-range.ttt.co.th
222.123.0.70	PTR	222.123.0.70.static-range.ttt.co.th
222.123.0.71	PTR	222.123.0.71.static-range.ttt.co.th
222.123.0.72	PTR	222.123.0.72.static-range.ttt.co.th
222.123.0.73	PTR	222.123.0.73.static-range.ttt.co.th
222.123.0.75	PTR	222.123.0.75.static-range.ttt.co.th
222.123.0.83	PTR	222.123.0.83.static-range.ttt.co.th
222.123.0.84	PTR	222.123.0.84.static-range.ttt.co.th
222.123.0.87	PTR	222.123.0.87.static-range.ttt.co.th
222.123.0.88	PTR	222.123.0.88.static-range.ttt.co.th
222.123.0.91	PTR	222.123.0.91.static-range.ttt.co.th
222.123.0.92	PTR	222.123.0.92.static-range.ttt.co.th
222.123.0.96	PTR	222.123.0.96.static-range.ttt.co.th
222.123.0.101	PTR	222.123.0.101.static-range.ttt.co.th
222.123.0.103	PTR	222.123.0.103.static-range.ttt.co.th
222.123.0.105	PTR	222.123.0.105.static-range.ttt.co.th
222.123.0.108	PTR	222.123.0.108.static-range.ttt.co.th
222.123.0.109	PTR	222.123.0.109.static-range.ttt.co.th
222.123.0.115	PTR	222.123.0.115.static-range.ttt.co.th
222.123.0.124	PTR	222.123.0.124.static-range.ttt.co.th
222.123.0.130	PTR	222.123.0.130.static-range.ttt.co.th
222.123.0.131	PTR	222.123.0.131.static-range.ttt.co.th
222.123.0.138	PTR	222.123.0.138.static-range.ttt.co.th
222.123.0.142	PTR	222.123.0.142.static-range.ttt.co.th
222.123.0.152	PTR	222.123.0.152.static-range.ttt.co.th
222.123.0.155	PTR	222.123.0.155.static-range.ttt.co.th
222.123.0.157	PTR	222.123.0.157.static-range.ttt.co.th
222.123.0.158	PTR	222.123.0.158.static-range.ttt.co.th
222.123.0.159	PTR	222.123.0.159.static-range.ttt.co.th
222.123.0.165	PTR	222.123.0.165.static-range.ttt.co.th
222.123.0.170	PTR	222.123.0.170.static-range.ttt.co.th
222.123.0.171	PTR	222.123.0.171.static-range.ttt.co.th
222.123.0.177	PTR	222.123.0.177.static-range.ttt.co.th
222.123.0.182	PTR	222.123.0.182.static-range.ttt.co.th
222.123.0.187	PTR	222.123.0.187.static-range.ttt.co.th
222.123.0.188	PTR	222.123.0.188.static-range.ttt.co.th
222.123.0.190	PTR	222.123.0.190.static-range.ttt.co.th
222.123.0.198	PTR	222.123.0.198.static-range.ttt.co.th
222.123.0.200	PTR	222.123.0.200.static-range.ttt.co.th
222.123.0.209	PTR	222.123.0.209.static-range.ttt.co.th
222.123.0.212	PTR	222.123.0.212.static-range.ttt.co.th
222.123.0.213	PTR	222.123.0.213.static-range.ttt.co.th
222.123.0.216	PTR	222.123.0.216.static-range.ttt.co.th
222.123.0.218	PTR	222.123.0.218.static-range.ttt.co.th
222.123.0.222	PTR	222.123.0.222.static-range.ttt.co.th
222.123.0.234	PTR	222.123.0.234.static-range.ttt.co.th
222.123.0.236	PTR	222.123.0.236.static-range.ttt.co.th
222.123.0.247	PTR	222.123.0.247.static-range.ttt.co.th
222.123.0.250	PTR	222.123.0.250.static-range.ttt.co.th
222.123.0.252	PTR	222.123.0.252.static-range.ttt.co.th
222.123.0.255	PTR	222.123.0.255.static-range.ttt.co.th
222.123.1.41	PTR	222.123.1.41.static-range.ttt.co.th
222.123.1.80	PTR	222.123.1.80.static-range.ttt.co.th