IP Address and Subnetting Guide - Allied Telesis

IP Address and Subnetting Guide

NETWORK ADDRESS RANGES BY CLASS

IP network addresses are issued as follows:

CLASS

RANGE

DEFAULT MASK

Class A Class B Class C

1-127 128-191 192-223

255.0.0.0 255.255.0.0 255.255.255.0

MAXIMUM NUMBER OF HOSTS BY CLASS

The maximum number of hosts is achieved by using the default subnet mask for each class (i.e. by having only one subnet).

CLASS

NO. OF ADDRESSES

Class A

224

Class B

216

Class C

28

16,777,216 65,536 256

BINARY CALCULATIONS

DECIMAL

20

1

21

2

22

4

23

8

24

16

25

32

26

64

27

128

BINARY

00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000

SUBNET MASKS - BINARY REPRESENTATIONS

DECIMAL

HEX

.128

80

.192

C0

.224

E0

.240

F0

.248

F8

.252

FC

.254

FE

.255

FF

BINARY

10000000 11000000 11100000 11110000 11111000 11111100 11111110 11111111

NO. OF BITS SUBNET MASK

NO. OF NO. OF HOSTS SUBNETS PER SUBNET

CLASS B

1 2 3 4 5 6 7 8 9 10 11 12 13 14

CLASS C

1 2 3 4 5 6

255.255.128.0 255.255.192.0 255.255.224.0 255.255.240.0 255.255.248.0 255.255.252.0 255.255.254.0 255.255.255.0 255.255.255.128 255.255.255.192 255.255.255.224 255.255.255.240 255.255.255.248 255.255.255.252

2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384

255.255.255.128

2

255.255.255.192

4

255.255.255.224

8

255.255.255.240

16

255.255.255.248

32

255.255.255.252

64

32766 16382

8190 4094 2046 1022 510 254 126

62 30 14

6 2

126 62 30 14

6 2

IP ADDRESS RANGES FOR CLASS C SUBNETS

SUBNET SUBNET SUBNET ADDRESS

SUBNET SUBNET SUBNET ADDRESS

MASK

NO. ADDRESS RANGE B'CAST MASK

NO.

ADDRESS RANGE B'CAST

Number of bits for Class C networks -- 24 bit mask = 255.255.255.0, 32 bit mask = 255.255.255.255.

USABLE SUBNETS AND ADDRESSES The top and bottom host numbers of any subnet may not be used.The bottom number is the subnet address and the top number is the broadcast address for the subnet.

128

0

(25 bits)

1

192

0

(26 bits)

1

2

3

224

0

(27 bits)

1

2

3

4

5

6

7

240

0

(28 bits)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

248

0

(29 bits)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

0

1-126

127

252

0

128

129-254 255

(30 bits)

1

2

0

1-62 63

3

64

65-126 127

4

128 129-190 191

5

192 193-254 255

6

0

1-30 31

7

32

33-62 63

8

64

65-94 95

9

96

97-126 127

10

128 129-158 159

11

160 161-190 191

12

192 193-222 223

13

224 225-254 255

14

15

0

1-14 15

16

16

17-30 31

17

32

33-46 47

18

48

49-62 63

19

64

65-78 79

20

80

81-94 95

21

96

97-110 111

22

112 113-126 127

23

128 129-142 143

24

144 145-158 159

25

160 161-174 175

26

176 177-190 191

27

192 193-206 207

28

208 209-222 223

29

224 225-238 239

30

240 241-254 255

31

0

1-6

7

32

8

9-14 15

33

16

17-22 23

34

24

25-30 31

35

32

33-38 39

36

40

41-46 47

37

48

49-54 55

38

56

57-62 63

39

64

65-70 71

40

72

73-78 79

41

80

81-86 87

42

88

89-94 95

43

96

97-102 103

44

104 105-110 111

45

112 113-118 119

46

120 121-126 127

47

128 129-134 135

48

136 137-142 143

49

144 145-150 151

50

152 153-158 159

51

160 161-166 167

52

168 169-174 175

53

176 177-182 183

54

184 185-190 191

55

192 193-198 199

56

200 201-206 207

57

208 209-214 215

58

216 217-222 223

59

224 225-230 231

60

232 233-238 239

61

240 241-246 247

62

248 249-254 255

63

0

1-2

3

4

5-6

7

8

9-10 11

12

13-14 15

16

17-18 19

20

21-22 23

24

25-26 27

28

29-30 31

32

33-34 35

36

37-38 39

40

41-42 43

44

45-46 47

48

49-50 51

52

53-54 55

56

57-58 59

60

61-62 63

64

65-66 67

68

69-70 71

72

73-74 75

76

77-78 79

80

81-82 83

84

85-86 87

88

89-90 91

92

93-94 95

96

97-98 99

100

101-102 103

104

105-106 107

108

109-110 111

112

113-114 115

116

117-118 119

120

121-122 123

124

125-126 127

128

129-130 131

132

133-134 135

136

137-138 139

140

141-142 143

144

145-146 147

148

149-150 151

152

153-154 155

156

157-158 159

160

161-162 163

164

165-166 167

168

169-170 171

172

173-174 175

176

177-178 179

180

181-182 183

184

185-186 187

188

189-190 191

192

193-194 195

196

197-198 199

200

201-202 203

204

205-206 207

208

209-210 211

212

213-214 215

216

217-218 219

220

221-222 223

224

225-226 227

228

229-230 231

232

233-234 235

236

237-238 239

240

241-242 243

244

245-246 247

248

249-250 251

252

253-254 255

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? 2014 Allied Telesis, Inc. All rights reserved. Information in this document is subject to change without notice. All company names, logos, and product designs that are trademarks or registered trademarks are the property of their respective owners.



C617-21003-00 RevF

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