as-block:       AS50893 - AS51311
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2024-12-10T14:54:30Z
last-modified:  2024-12-10T14:54:30Z
source:         RIPE



aut-num:        AS51088
as-name:        A2B
org:            ORG-AIB25-RIPE
remarks:        ============================================================
remarks:        AMS-IX peering
remarks:        ============================================================
import:         from AS51088:AS-PEERS-AMSIX action pref=80; accept ANY AND NOT {0.0.0.0/0}
export:         to AS51088:AS-PEERS-AMSIX announce AS51088:AS-A2B
remarks:        ============================================================
remarks:        AMS-IX route server policy
remarks:        ============================================================
import-via:     AS6777 from AS-AMS-IX-RS EXCEPT AS61180:AS-PEERS-AMSIX accept ANY
export-via:     AS6777 to AS-AMS-IX-RS EXCEPT AS61180:AS-PEERS-AMSIX announce AS51088:AS-A2B
remarks:        ============================================================
remarks:        A2B Internet customers
remarks:        ============================================================
import:         from AS57060 action pref=50; accept AS57060
export:         to AS57060 announce ANY
import:         from AS60358 action pref=50; accept AS60358
export:         to AS60358 announce ANY
import:         from AS200560 action pref=50; accept AS200560
export:         to AS200560 announce ANY
import:         from AS202169 action pref=50; accept AS202169
export:         to AS202169 announce ANY
import:         from AS206521 action pref=50; accept AS206521
export:         to AS206521 announce ANY
import:         from AS206637 action pref=50; accept AS-IQIP
export:         to AS206637 announce ANY
import:         from AS50266 action pref=50; accept AS-TMNL
export:         to AS50266 announce AS51088:AS-TMNL-IXP-PEERS
remarks:        ============================================================
remarks:        Transits
remarks:        ============================================================
import:         from AS2914 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export:         to AS2914 announce AS51088:AS-A2B
import:         from AS3257 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export:         to AS3257 announce AS51088:AS-A2B
import:         from AS8455 action pref=100; accept ANY AND NOT {0.0.0.0/0}
export:         to AS8455 announce AS51088:AS-A2B
remarks:        ============================================================
remarks:        Basic Interconnection Requirements
remarks:        ============================================================
remarks:
remarks:        The following is required to share a BGP session with
remarks:        AS51088:
remarks:
remarks:        - The customer's gateway router must be using BGP v4.
remarks:        - The customer must use a RIR assigned ASN.
remarks:        - The customer must have its customer-routes registered with
remarks:        an instance of the IRR. Its 'as-set' must include the ASNs
remarks:        originating routes and for each route exported a relevant
remarks:        'route' object is required.
remarks:        - The customer must export its customer-routes reasonably
remarks:        aggregated, and AS51088 will not accept any prefix that is
remarks:        longer than a /24 (except for denial-of-service mitigation).
remarks:        - The customer may use MED to signal its return path pre-
remarks:        ference in AS51088.
remarks:
admin-c:        AS51088-RIPE
tech-c:         AS51088-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         A2B-INTERNET-MNT
created:        2010-05-28T12:48:01Z
last-modified:  2026-01-20T11:49:39Z
source:         RIPE

organisation:   ORG-AIB25-RIPE
org-name:       A2B IP B.V.
country:        NL
reg-nr:         57220786
org-type:       LIR
address:        Science Park 402
address:        1098 XH
address:        Amsterdam
address:        NETHERLANDS
phone:          +31859020410
e-mail:         jlauwers@a2b-internet.com
admin-c:        AS51088-RIPE
tech-c:         AS51088-RIPE
abuse-c:        AS51088-RIPE
mnt-ref:        A2B-INTERNET-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         A2B-INTERNET-MNT
created:        2021-08-13T08:11:29Z
last-modified:  2026-05-13T07:29:13Z
source:         RIPE

role:           A2B Internet Role-Object
address:        Spinnekop 2
address:        NL-1444 GN Purmerend
address:        The Netherlands
phone:          +31 85 902 0410
remarks:        ------------------------------------------------
remarks:        abuse complaints ONLY to abuse@a2b-internet.com please
remarks:        provide as much details and include full headers
remarks:        and/or logfiles.
remarks:        Peering questions / requests to peering@a2b-internet.com
remarks:        Network questions / issues to noc@a2b-internet.com
remarks:        The helpdesk can be reached at helpdesk@a2b-internet.com
remarks:        http://www.a2b-internet.com/
remarks:        ------------------------------------------------
admin-c:        lauw42
tech-c:         DDW67-RIPE
tech-c:         lauw42
abuse-mailbox:  abuse@a2b-internet.com
nic-hdl:        AS51088-RIPE
mnt-by:         A2B-INTERNET-MNT
e-mail:         noc@a2b-internet.com
notify:         noc@a2b-internet.com
created:        2010-05-28T17:13:29Z
last-modified:  2025-02-06T12:13:49Z
source:         RIPE