assignment policy is documented in:
        
        RIPE NCC members can request AS Numbers using the
form available in the LIR Portal or at:
        
****************************************************
         Information about the RIPE Database can be found at:
         http://www.ripe.net/db/index.html
****************************************************

ALL peering requests see
http://www.bt.net/cgi-bin/peering-request

for technical issues, pls contact: peering@bt.com

for abuse, pls contact abuse@eu.bt.net

24*7 NOC: network@eu.bt.net

This object describes non-customer peerings
Customer peerings are described in the macro AS-BT-XX
(replace XX with the country code NL, UK, BE, IE,etc)


Communities scheme:
The following BGP communities can be set by BT
BGP customers to affect announcements to major peers.

******************************************************

5400:NXXX
N=1        not announce
N=2        prepend an extra "5400 5400" on announcement
Valid values for XXX:
000        All peers and transits
500        All transits
501        Sprint AS1239
502        Savvis AS3561
503        Level3 AS3356
506        Global crossing AS3549
004        C&W AS1273
005        Verizon EMEA AS702
014        DTAG AS3320
016        Opentransit AS5511
018        GlobeInternet Tata AS6453
023        Tinet AS3257
027        Telia AS1299
045        Telecom Italia AS6762
073        Eurorings AS286
110        Verio AS2914
169        Cogent AS174
177        Telefonica Int. AS12956 and Germany AS6805
178        XO AS2828
190        Comcast AS7922
191        Highwinds AS12989
300        All other peers


The above information was collected from whois.ripe.net, using
object "AS5400" on Feburary 1, 2012