Subnetting Chart

Class C
Mask	Notation	Subnets	Hosts
255.255.255.0	/24	1	256
255.255.255.128	/25	2	128
255.255.255.192	/26	4	64
255.255.255.224	/27	8	32
255.255.255.240	/28	16	16
255.255.255.248	/29	32	8
255.255.255.252	/30	64	4
255.255.255.254	/31	128	2
255.255.255.255	/32	256	1
Class B
Mask	Notation	Subnets	Hosts
255.255.0.0	/16	2	65,536
255.255.128.0	/17	2	32,768
255.255.192.0	/18	4	16,384
255.255.224.0	/19	8	8,192
255.255.240.0	/20	16	4,096
255.255.248.0	/21	32	2,048
255.255.252.0	/22	64	1,024
255.255.254.0	/23	128	512
255.255.255.0	/24	256	256
Class A
Mask	Notation	Subnets	Hosts
255.0.0.0	/8	1	16,777,216
255.128.0.0	/9	2	8,388,608
255.192.0.0	/10	4	4,194,304
255.224.0.0	/11	8	2,097,152
255.240.0.0	/12	16	1,048,576
255.248.0.0	/13	32	524,288
255.252.0.0	/14	64	262,144
255.254.0.0	/15	128	131,072
255.255.0.0	/16	256	65,536

Hexidecimal Conversion Table

Decimal-hexadecimal-binary conversion table

Dec	Hex	Bin		Dec	Hex	Bin		Dec	Hex	Bin		Dec	Hex	Bin
0	0	00000000		64	40	01000000		128	80	10000000		192	c0	11000000
1	1	00000001		65	41	01000001		129	81	10000001		193	c1	11000001
2	2	00000010		66	42	01000010		130	82	10000010		194	c2	11000010
3	3	00000011		67	43	01000011		131	83	10000011		195	c3	11000011
4	4	00000100		68	44	01000100		132	84	10000100		196	c4	11000100
5	5	00000101		69	45	01000101		133	85	10000101		197	c5	11000101
6	6	00000110		70	46	01000110		134	86	10000110		198	c6	11000110
7	7	00000111		71	47	01000111		135	87	10000111		199	c7	11000111
8	8	00001000		72	48	01001000		136	88	10001000		200	c8	11001000
9	9	00001001		73	49	01001001		137	89	10001001		201	c9	11001001
10	a	00001010		74	4a	01001010		138	8a	10001010		202	ca	11001010
11	b	00001011		75	4b	01001011		139	8b	10001011		203	cb	11001011
12	c	00001100		76	4c	01001100		140	8c	10001100		204	cc	11001100
13	d	00001101		77	4d	01001101		141	8d	10001101		205	cd	11001101
14	e	00001110		78	4e	01001110		142	8e	10001110		206	ce	11001110
15	f	00001111		79	4f	01001111		143	8f	10001111		207	cf	11001111
16	10	00010000		80	50	01010000		144	90	10010000		208	d0	11010000
17	11	00010001		81	51	01010001		145	91	10010001		209	d1	11010001
18	12	00010010		82	52	01010010		146	92	10010010		210	d2	11010010
19	13	00010011		83	53	01010011		147	93	10010011		211	d3	11010011
20	14	00010100		84	54	01010100		148	94	10010100		212	d4	11010100
21	15	00010101		85	55	01010101		149	95	10010101		213	d5	11010101
22	16	00010110		86	56	01010110		150	96	10010110		214	d6	11010110
23	17	00010111		87	57	01010111		151	97	10010111		215	d7	11010111
24	18	00011000		88	58	01011000		152	98	10011000		216	d8	11011000
25	19	00011001		89	59	01011001		153	99	10011001		217	d9	11011001
26	1a	00011010		90	5a	01011010		154	9a	10011010		218	da	11011010
27	1b	00011011		91	5b	01011011		155	9b	10011011		219	db	11011011
28	1c	00011100		92	5c	01011100		156	9c	10011100		220	dc	11011100
29	1d	00011101		93	5d	01011101		157	9d	10011101		221	dd	11011101
30	1e	00011110		94	5e	01011110		158	9e	10011110		222	de	11011110
31	1f	00011111		95	5f	01011111		159	9f	10011111		223	df	11011111
32	20	00100000		96	60	01100000		160	a0	10100000		224	e0	11100000
33	21	00100001		97	61	01100001		161	a1	10100001		225	e1	11100001
34	22	00100010		98	62	01100010		162	a2	10100010		226	e2	11100010
35	23	00100011		99	63	01100011		163	a3	10100011		227	e3	11100011
36	24	00100100		100	64	01100100		164	a4	10100100		228	e4	11100100
37	25	00100101		101	65	01100101		165	a5	10100101		229	e5	11100101
38	26	00100110		102	66	01100110		166	a6	10100110		230	e6	11100110
39	27	00100111		103	67	01100111		167	a7	10100111		231	e7	11100111
40	28	00101000		104	68	01101000		168	a8	10101000		232	e8	11101000
41	29	00101001		105	69	01101001		169	a9	10101001		233	e9	11101001
42	2a	00101010		106	6a	01101010		170	aa	10101010		234	ea	11101010
43	2b	00101011		107	6b	01101011		171	ab	10101011		235	eb	11101011
44	2c	00101100		108	6c	01101100		172	ac	10101100		236	ec	11101100
45	2d	00101101		109	6d	01101101		173	ad	10101101		237	ed	11101101
46	2e	00101110		110	6e	01101110		174	ae	10101110		238	ee	11101110
47	2f	00101111		111	6f	01101111		175	af	10101111		239	ef	11101111
48	30	00110000		112	70	01110000		176	b0	10110000		240	f0	11110000
49	31	00110001		113	71	01110001		177	b1	10110001		241	f1	11110001
50	32	00110010		114	72	01110010		178	b2	10110010		242	f2	11110010
51	33	00110011		115	73	01110011		179	b3	10110011		243	f3	11110011
52	34	00110100		116	74	01110100		180	b4	10110100		244	f4	11110100
53	35	00110101		117	75	01110101		181	b5	10110101		245	f5	11110101
54	36	00110110		118	76	01110110		182	b6	10110110		246	f6	11110110
55	37	00110111		119	77	01110111		183	b7	10110111		247	f7	11110111
56	38	00111000		120	78	01111000		184	b8	10111000		248	f8	11111000
57	39	00111001		121	79	01111001		185	b9	10111001		249	f9	11111001
58	3a	00111010		122	7a	01111010		186	ba	10111010		250	fa	11111010
59	3b	00111011		123	7b	01111011		187	bb	10111011		251	fb	11111011
60	3c	00111100		124	7c	01111100		188	bc	10111100		252	fc	11111100
61	3d	00111101		125	7d	01111101		189	bd	10111101		253	fd	11111101
62	3e	00111110		126	7e	01111110		190	be	10111110		254	fe	11111110
63	3f	00111111		127	7f	01111111		191	bf	10111111		255	ff	11111111