
AUTONOMOUS SYSTEM NUMBERS

(last updated 13 April 2006)

The Autonomous System (AS) numbers are used by various routing protocols.
AS numbers are allocated to the regional registries by the IANA.
	AfriNIC		<hostmaster@afrinic.net>
	APNIC		<helpdesk@apnic.net>
	ARIN		<hostmaster@arin.net>
	LACNIC		<hostmaster@lacnic.net>
	RIPE-NCC	<ncc@ripe.net>
AS Numbers can be obtained from the registry in your region.
Listed below are the allocated blocks to the regional registries.

Number         Description
-------------- -------------------------------------------------------------
             0 Reserved  - May be use to identify non-routed networks

     1 -  1876 Allocated by ARIN

  1877 -  1901 Allocated by RIPE NCC

  1902 -  2042 Allocated by ARIN

          2043 Allocated by RIPE NCC

  2044 -  2046 Allocated by ARIN

          2047 Allocated by RIPE NCC

  2048 -  2106 Allocated by ARIN

  2107 -  2136 Allocated by RIPE NCC

  2137 -  2584 Allocated by ARIN

  2585 -  2614 Allocated by RIPE NCC

  2615 -  2772 Allocated by ARIN

  2773 -  2822 Allocated by RIPE NCC

  2823 -  2829 Allocated by ARIN

  2830 -  2879 Allocated by RIPE NCC

  2880 -  3153 Allocated by ARIN

  3154 -  3353 Allocated by RIPE NCC

  3354 -  4607 Allocated by ARIN

  4608 -  4864 Allocated by APNIC

  4865 -  5376 Allocated by ARIN

  5377 -  5631 Allocated by RIPE NCC

  5632 -  6655 Allocated by ARIN

  6656 -  6911 Allocated by RIPE NCC

  6912 -  7466 Allocated by ARIN

  7467 -  7722 Allocated by APNIC

  7723 -  8191 Allocated by ARIN

  8192 -  9215 Allocated by RIPE NCC

  9216 - 10239 Allocated by APNIC

 10240 - 11263 Allocated by ARIN

 11264 - 12287 Allocated by ARIN

 12288 - 13311 Allocated by RIPE NCC

 13312 - 14335 Allocated by ARIN

 14336 - 15359 Allocated by ARIN

 15360 - 16383 Allocated by RIPE NCC

 16384 - 17407 Allocated by ARIN

 17408 - 18431 Allocated by APNIC

 18432 - 19455 Allocated by ARIN

 19456 - 20479 Allocated by ARIN 

 20480 - 21503 Allocated by RIPE NCC

 21504 - 22527 Allocated by ARIN      

 22528 - 23551 Allocated by ARIN

 23552 - 24575 Allocated by APNIC

 24576 - 25599 Allocated by RIPE NCC

 25600 - 26623 Allocated by ARIN (March 2002)
 
 26624 - 27647 Allocated by ARIN (September 2002)

 27648 - 28671 Allocated by LACNIC (November 2002)

 28672 - 29695 Allocated by RIPE NCC (December 2002)

 29696 - 30719 Allocated by ARIN (March 2003)

 30720 - 31743 Allocated by RIPE NCC (September 2003)
 
 31744 - 32767 Allocated by ARIN (November 2003)

 32768 - 33791 Allocated by ARIN (May 2004)

 33792 - 34815 Allocated by RIPE NCC (June 2004)

 34816 - 35839 Allocated by RIPE NCC (February 2005)
 
 35840 - 36863 Allocated by ARIN (February 2005)
   
 36864 - 37887 Allocated by AfriNIC (April 2005)
 
 37888 - 38911 Allocated by APNIC (June 2005)

 38912 - 39935 Allocated by RIPE NCC (September 2005)

 39936 - 40959 Allocated by ARIN (29 March 2006)

 40960 - 41983 Allocated by RIPE NCC (13 April 2006)
 
 41984 - 48127 Held by the IANA
 
 48128 - 64511 Reserved by the IANA

 64512 - 65534 Designated for private use (Allocated to the IANA)

         65535 Reserved


Specially designated Autonomous System Numbers:

23456     AS_TRAN             [draft-ietf-idr-as4bytes-04.txt]

[]
