More ASN collissions

Rene Wilhelm wilhelm at
Sun Dec 13 18:26:45 CST 2009

Florian Weimer wrote:
> * Rene Wilhelm:
>> AS3745 is not a duplicate ASN assignment either. Like AS35868 the entry at
>> is a user created object in the RIPE routing registry, not
>> an assignment by RIPE NCC.
> How can you tell one from the other?  Is the lack of an org: attribute
> reliable?
The info is in the as-block object which returns in 
addition to the
aut-num object when you do a default query for an AS number.

For example for as43210 you get this:

as-block:       AS43008 - AS44031
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are further assigned to network
remarks:        operators in the RIPE NCC service region. AS
remarks:        assignment policy is documented in:
remarks:        <>
remarks:        RIPE NCC members can request AS Numbers using the
remarks:        form available in the LIR Portal or at:
remarks:        <>
org:            ORG-NCC1-RIPE
admin-c:        CREW-RIPE
tech-c:         RD132-RIPE
mnt-by:         RIPE-DBM-MNT
mnt-lower:      RIPE-NCC-HM-MNT
source:         RIPE # Filtered


Only AS numbers which are covered by "RIPE NCC ASN blocks" have been 
assigned by RIPE NCC or transferred to RIPE NCC (like AS1707).

-- Rene

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