first block i need - 6 host <------192.168.138.184/29

second block - 6 host <------192.168.138.176/29

Third Block - 16 Host <----192.168.138.160/28

Fourth Block - 30 Host <---192.168.138.129/27

Fifth Block - 62 Host <----192.168.138.0/26

Sixth block - 62 Host <---192.168.138.64/26

seventh block  - 606 Host   <-----192.168.132.0/22

eighth Block -  508 Host  <----192.168.128.0/23

Ninth Block - 303 Host  <----192.168.130.0/23

Tenth Block - 126 Host <-----192.168.136.0/25 126

Eleventh  Block - 126 Host <---192.168.136.129/25

Twelth Block - 120 Host <----192.168.137.0/25

Thirteenth Block - 126 Host  <--192.168.137.129/25



192.168.140.0/22  Spare
192.168.139.0/24  Spare






				     192.168.128.0/20  4094 hosts

			192.168.128.0/21  2046 host					             		192.168.136.0/21  2046 host		
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192.168.128.0/22  1022 hosts       192.168.132.0/22  1022 hosts <seventh block					     |
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192.168.128.0/23 510 hosts < eighth Block     192.168.130.0/23 510 hosts < Ninth Block				     |
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											192.168.136.0/22  1022 hosts    			     192.168.140.0/22  1022 hosts
											|								|
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							   192.168.136.0/23 512 hosts   192.168.138.0/23  512 hosts	                               192.168.140.0/23 512 hosts  					192.168.128.142/23  512 hosts
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									|			 |							|								|
					  192.168.136.0/24 254 hosts   192.168.137.0/24    192.168.138.0/24 254 hosts   192.168.139.0/24   	192.168.140.0/24 254 hosts   192.168.141.0/24  254 hosts		|
					|					|			|														192.168.128.142/24 254 hosts   192.168.128.143/24  254 hosts
					|					|			|
					|					|		
           192.168.136.0/25 126 hosts <Tenth Block  | 192.168.136.129/25 126 hosts <Eleventh  Block	|	192.168.137.0/25 126 hosts <Twelth Block | 192.168.137.129/25 126 hosts <Thirteenth Block
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											192.168.138.0/25 126 hosts        			192.168.138.129/25 126 hosts
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									     192.168.138.0/26 62 hosts <Fifth Block    192.168.138.64/26 62 hosts <- Sixth block            |
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																		192.168.138.129/26 62 hosts  192.168.138.192/26 62 hosts  														
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																	192.168.138.129/27 30 hosts < Fourth Block       192.168.138.160/27 30 hosts
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								                                                                                 					  		|
																							192.168.138.160/28 14 hosts <Third Block	 192.168.138.176/28 14 hosts 	
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																												192.168.138.176/29 6 hosts< second block  192.168.138.184/29 6 hosts < first block