[ih] 13 the unlucky number

[Alejandro Acosta]

Hello list,

   I have a question and one more time I believe this a good place to ask.

   During the weekend I read the old RFC 790 (ASSIGNED NUMBERS). When 
reading it I noticed the following:

{...}

       009.rrr.rrr.rrr   BRAGG-PR      Ft. Bragg Packet Radio Net [JEM]
       010.rrr.rrr.rrr   ARPANET       ARPANET [17,1,VGC]
       011.rrr.rrr.rrr   UCLNET        University College London     [PK]
       012.rrr.rrr.rrr   CYCLADES      CYCLADES [VGC]
       013.rrr.rrr.rrr                 Unassigned [JBP]
       014.rrr.rrr.rrr   TELENET       TELENET [VGC]
       015.rrr.rrr.rrr   EPSS          British Post Office EPSS      [PK]
       016.rrr.rrr.rrr   DATAPAC       DATAPAC [VGC]
       017.rrr.rrr.rrr   TRANSPAC      TRANSPAC [VGC]
       018.rrr.rrr.rrr   LCSNET        MIT LCS Network [43,10,DDC2]

{...}


   As you can see the 013.rrr.rrr.rrr was unassigned but some subsequent 
prefix were (014, 015 ..... ). Is there any reason for it?. I know 013 
was later assigned to XEROX-NET.

   I wonder if 013 was skipped because some sort of superstitions?.


Thanks,


Alejandro,