cat /proc/net/tcp6
  sl  local_address                         remote_address                        st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode
   0: 00000000000000000000000000000000:6989 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 4868198 1 ffff880022d88000 100 0 0 10 0
   1: 00000000000000000000000000000000:1F90 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000  1002        0 3804952 1 ffff880116f42a80 100 0 0 10 0
   2: 00000000000000000000000000000000:0016 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 62465 1 ffff880044439980 100 0 0 10 0
   3: 00000000000000000000000001000000:0019 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000     0        0 17053 1 ffff8800b45c0880 100 0 0 10 0
   4: 00000000000000000000000000000000:20FB 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000  1002        0 3804956 1 ffff880116f43300 100 0 0 10 0
   5: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:AA89 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff880087290700
   6: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:8477 06 00000000:00000000 03:00000CE0 00000000     0        0 0 3 ffff880087290d00
   7: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:CEED 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff880087290f00
   8: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:EBC8 06 00000000:00000000 03:00000361 00000000     0        0 0 3 ffff880087290b00
   9: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:81A4 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff880087290a00
  10: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:E5F8 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff8800b739c500
  11: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:97B6 06 00000000:00000000 03:00000CE0 00000000     0        0 0 3 ffff880087290e00
  12: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:BB41 06 00000000:00000000 03:00000CE0 00000000     0        0 0 3 ffff880087290100
  13: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:A668 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff8800b739cf00
  14: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:A7CB 06 00000000:00000000 03:00000CE0 00000000     0        0 0 3 ffff880087290600
  15: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:FACA 06 00000000:00000000 03:00000556 00000000     0        0 0 3 ffff880087290000
  16: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:9FD0 06 00000000:00000000 03:00000169 00000000     0        0 0 3 ffff880087290500
  17: 0000000000000000FFFF000009009A0A:20FB 0000000000000000FFFF0000819B9EA2:8BAD 01 00000000:00000000 00:00000000 00000000  1002        0 5182924 1 ffff8800b45c1100 20 4 15 10 -1
  18: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:BD97 06 00000000:00000000 03:0000074C 00000000     0        0 0 3 ffff880087290900
  19: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:E659 06 00000000:00000000 03:00000CE0 00000000     0        0 0 3 ffff880087290400
  20: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:85A9 01 00000000:00000000 00:00000000 00000000  1002        0 5182939 3 ffff8800b45c3300 20 4 33 10 -1
  21: 0000000000000000FFFF000009009A0A:1F90 0000000000000000FFFF00002A85C559:F89A 06 00000000:00000000 03:00001190 00000000     0        0 0 3 ffff880087290c00
+ cat /proc/net/tcp6
+ awk '{print $2}'
+ awk --non-decimal-data -F: '{print ("0x" $2)+0}'
0
27017
8080
22
25
8443
8080
8080
8080
8080
8080
8080
8080
8080
8080
8080
8080
8080
8443
8080
8080
8080
8080