AUTONOMOUS SYSTEM

AS5400

BT British Telecommunications Limited

Announced

GBRIPE

www.bt.net/looking-glass.html

Website preview from public registry data for AS5400

Registry websiteOpen site ↗

Registry information

Complete public RIR and IRR records returned by RIPEstat.

aut-num	5400
as-name	BT
org	ORG-CNS3-RIPE
remarks	---------------------------------------------
remarks	Upstreams:
remarks	---------------------------------------------
import	from AS3356 action pref=20; accept AS-LEVELTHREEEU
import	from AS3356 action pref=100; accept ANY
export	to AS3356 announce AS-BT-EU
import	from AS1299 action pref=20; accept AS-TWELVE99
import	from AS1299 action pref=100; accept ANY
export	to AS1299 announce AS-BT-EU
remarks	---------------------------------------------
remarks	Peers:
remarks	---------------------------------------------
import	from AS42 action pref=20; accept AS-PCH
export	to AS42 announce AS-BT-EU
import	from AS174 action pref=20; accept AS174
export	to AS174 announce AS-BT-EU
import	from AS293 action pref=20; accept AS-ESNET
export	to AS293 announce AS-BT-EU
import	from AS577 action pref=20; accept AS577
export	to AS577 announce AS-BT-EU
import	from AS680 action pref=20; accept AS-DFNTOWINISP
export	to AS680 announce AS-BT-EU
import	from AS702 action pref=20; accept AS-UUNETEURO
export	to AS702 announce AS-BT-EU
import	from AS714 action pref=20; accept AS714
export	to AS714 announce AS-BT-EU
import	from AS719 action pref=20; accept AS719
export	to AS719 announce AS-BT-EU
import	from AS766 action pref=20; accept AS-REDIRIS
export	to AS766 announce AS-BT-EU
import	from AS786 action pref=20; accept AS-JANETPLUS
export	to AS786 announce AS-BT-EU
import	from AS812 action pref=20; accept AS-ROGERS
export	to AS812 announce AS-BT-EU
import	from AS1120 action pref=20; accept AS-ACOSERV
export	to AS1120 announce AS-BT-EU
import	from AS1257 action pref=20; accept AS-SWIPNET
export	to AS1257 announce AS-BT-EU
import	from AS1267 action pref=20; accept AS-INFOSTRADA
export	to AS1267 announce AS-BT-EU
import	from AS1273 action pref=20; accept AS-CW
export	to AS1273 announce AS-BT-EU
import	from AS1547 action pref=20; accept AS1547
export	to AS1547 announce AS-BT-EU
import	from AS1741 action pref=20; accept AS-FUNET
export	to AS1741 announce AS-BT-EU
import	from AS1759 action pref=20; accept AS-SONERA
export	to AS1759 announce AS-BT-EU
import	from AS1828 action pref=20; accept AS-UNITAS
export	to AS1828 announce AS-BT-EU
import	from AS1853 action pref=20; accept AS-ACONET
export	to AS1853 announce AS-BT-EU
import	from AS1901 action pref=20; accept AS-KQ
export	to AS1901 announce AS-BT-EU
import	from AS1955 action pref=20; accept AS-HBONETEN
export	to AS1955 announce AS-BT-EU
import	from AS2116 action pref=20; accept AS-CATCHCOM
export	to AS2116 announce AS-BT-EU
import	from AS2497 action pref=20; accept AS-IIJ
export	to AS2497 announce AS-BT-EU
import	from AS2603 action pref=20; accept AS-NORDUNET
export	to AS2603 announce AS-BT-EU
import	from AS2611 action pref=20; accept AS-BELNET
export	to AS2611 announce AS-BT-EU
import	from AS2635 action pref=20; accept AS2635
export	to AS2635 announce AS-BT-EU
import	from AS2686 action pref=20; accept AS-IGNEMEA
export	to AS2686 announce AS-BT-EU
import	from AS2818 action pref=20; accept AS-BBC
export	to AS2818 announce AS-BT-EU
import	from AS2852 action pref=20; accept AS-CESNET
export	to AS2852 announce AS-BT-EU
import	from AS2860 action pref=20; accept AS-NOVIS
export	to AS2860 announce AS-BT-EU
import	from AS2906 action pref=20; accept AS-NFLX
export	to AS2906 announce AS-BT-EU
import	from AS3209 action pref=20; accept AS-ARCORGLOBAL
export	to AS3209 announce AS-BT-EU
import	from AS3223 action pref=20; accept AS-VOXILITY-SET
export	to AS3223 announce AS-BT-EU
import	from AS3257 action pref=20; accept AS-TISCALI
export	to AS3257 announce AS-BT-EU
import	from AS3292 action pref=20; accept AS-TDCNET
export	to AS3292 announce AS-BT-EU
import	from AS3303 action pref=20; accept AS-SWCMGLOBAL
export	to AS3303 announce AS-BT-EU
import	from AS3304 action pref=20; accept AS-UBNBE
export	to AS3304 announce AS-BT-EU
import	from AS3320 action pref=20; accept AS3320:AS-DTAG
export	to AS3320 announce AS-BT-EU
import	from AS3333 action pref=20; accept AS3333
export	to AS3333 announce AS-BT-EU
import	from AS3352 action pref=20; accept AS-TDE
export	to AS3352 announce AS-BT-EU
import	from AS3491 action pref=20; accept AS-CAIS
export	to AS3491 announce AS-BT-EU
import	from AS3856 action pref=20; accept AS-PCH
export	to AS3856 announce AS-BT-EU
import	from AS4134 action pref=20; accept AS-CN
export	to AS4134 announce AS-BT-EU
import	from AS4436 action pref=20; accept AS-NLAYER
export	to AS4436 announce AS-BT-EU
import	from AS4589 action pref=20; accept AS-EASYNET
export	to AS4589 announce AS-BT-EU
import	from AS4637 action pref=20; accept AS4637
export	to AS4637 announce AS-BT-EU
import	from AS4766 action pref=20; accept AS-KORNET
export	to AS4766 announce AS-BT-EU
import	from AS4837 action pref=20; accept AS4837:AS-CNCNET
export	to AS4837 announce AS-BT-EU
import	from AS5432 action pref=20; accept AS-SKYNETBE
export	to AS5432 announce AS-BT-EU
import	from AS5459 action pref=20; accept AS5459
export	to AS5459 announce AS-BT-EU
import	from AS5511 action pref=20; accept AS-OPENTRANSIT
export	to AS5511 announce AS-BT-EU
import	from AS5610 action pref=20; accept AS-CTIOL
export	to AS5610 announce AS-BT-EU
import	from AS5650 action pref=20; accept AS-ELI
export	to AS5650 announce AS-BT-EU
import	from AS6079 action pref=20; accept AS-RCN
export	to AS6079 announce AS-BT-EU
import	from AS6407 action pref=20; accept AS-PRTL-CDN
export	to AS6407 announce AS-BT-EU
import	from AS6453 action pref=20; accept AS-GLOBEINTERNET
export	to AS6453 announce AS-BT-EU
import	from AS6461 action pref=20; accept AS-ABOVE
export	to AS6461 announce AS-BT-EU
import	from AS6507 action pref=20; accept AS6507
export	to AS6507 announce AS-BT-EU
import	from AS6661 action pref=20; accept AS-PTLU
export	to AS6661 announce AS-BT-EU
import	from AS6730 action pref=20; accept AS-GLOBAL
export	to AS6730 announce AS-BT-EU
import	from AS6762 action pref=20; accept AS-SEABONE
export	to AS6762 announce AS-BT-EU
import	from AS6774 action pref=20; accept AS-BELBONE
export	to AS6774 announce AS-BT-EU
import	from AS6805 action pref=20; accept AS-TDDE
export	to AS6805 announce AS-BT-DE
import	from AS6830 action pref=20; accept AS-AORTA
export	to AS6830 announce AS-BT-EU
import	from AS6848 action pref=20; accept AS-TELENET
export	to AS6848 announce AS-BT-EU
import	from AS6871 action pref=20; accept AS-PLUSNETUK
export	to AS6871 announce AS-BT-EU
import	from AS6881 action pref=20; accept AS-NIX
export	to AS6881 announce AS-BT-EU
import	from AS6939 action pref=20; accept AS-HURRICANE
export	to AS6939 announce AS-BT-EU
import	from AS7029 action pref=20; accept AS-WINDSTREAM
export	to AS7029 announce AS-BT-EU
import	from AS7132 action pref=20; accept AS-SBCIS-7132
export	to AS7132 announce AS-BT-EU
import	from AS7843 action pref=20; accept AS-ROADRUNNER
export	to AS7843 announce AS-BT-EU
import	from AS7922 action pref=20; accept AS7922
export	to AS7922 announce AS-BT-EU
import	from AS8075 action pref=20; accept AS-MICROSOFT
export	to AS8075 announce AS-BT-EU
import	from AS8068 action pref=20; accept AS-MICROSOFT
export	to AS8068 announce AS-BT-EU
import	from AS8210 action pref=20; accept AS-TELENOR
export	to AS8210 announce AS-BT-EU
import	from AS8220 action pref=20; accept AS-COLT
export	to AS8220 announce AS-BT-EU
import	from AS8283 action pref=20; accept AS-COLOCLUE
export	to AS8283 announce AS-BT-EU
import	from AS8365 action pref=20; accept AS-MANDA
export	to AS8365 announce AS-BT6
import	from AS8447 action pref=20; accept AS-PTA and AS-TA6
export	to AS8447 announce AS-BT-EU
import	from AS8473 action pref=20; accept AS-BAHNHOF
export	to AS8473 announce AS-BT-EU
import	from AS8487 action pref=20; accept AS-PHIBEE-TELECOM
export	to AS8487 announce AS-BT-EU
import	from AS8560 action pref=20; accept AS-SCHLUND
export	to AS8560 announce AS-BT-EU
import	from AS8674 action pref=20; accept AS-NETNOD
export	to AS8674 announce AS-BT-EU
import	from AS8866 action pref=20; accept AS-BTC-UP
export	to AS8866 announce AS-BT-EU
import	from AS8881 action pref=20; accept AS-VT-TRANSIT
export	to AS8881 announce AS-BT-EU
import	from AS8966 action pref=20; accept AS-EMIX
export	to AS8966 announce AS-BT-EU
import	from AS9002 action pref=20; accept AS-RETN
export	to AS9002 announce AS-BT-EU
import	from AS9009 action pref=20; accept AS-GBXS
export	to AS9009 announce AS-BT-EU
import	from AS9116 action pref=20; accept AS-GOLDEN
export	to AS9116 announce AS-BT-EU
import	from AS9121 action pref=20; accept AS-TTNET
export	to AS9121 announce AS-BT-EU
import	from AS9136 action pref=20; accept AS-WOBCOM
export	to AS9136 announce AS-BT-EU
import	from AS9318 action pref=20; accept AS9318
export	to AS9318 announce AS-BT-EU
import	from AS9193 action pref=20; accept AS-SPEEDPORT
export	to AS9193 announce AS-BT-EU
import	from AS9498 action pref=20; accept AS9498:AS-BHARTI-IN
export	to AS9498 announce AS-BT-EU
import	from AS9505 action pref=20; accept AS-TWIG
export	to AS9505 announce AS-BT-EU
import	from AS11164 action pref=20; accept AS-TR
export	to AS11164 announce AS-BT-EU
import	from AS11867 action pref=20; accept AS-PRTL
export	to AS11867 announce AS-BT-EU
import	from AS12189 action pref=20; accept AS-PHOENIXNAP
export	to AS12189 announce AS-BT-EU
import	from AS12389 action pref=20; accept AS-ROSTELECOM
export	to AS12389 announce AS-BT-EU
import	from AS12430 action pref=20; accept AS-VODAFONE-ES
export	to AS12430 announce AS-BT-EU
import	from AS12552 action pref=20; accept AS12552
export	to AS12552 announce AS-BT-EU
import	from AS12715 action pref=20; accept AS-JAZZTRANS
export	to AS12715 announce AS-BT-EU
import	from AS12741 action pref=20; accept AS-NETIA
export	to AS12741 announce AS-BT-EU
import	from AS12876 action pref=20; accept AS12876
export	to AS12876 announce AS-BT-EU
import	from AS12956 action pref=20; accept AS-TDATANET
export	to AS12956 announce AS-BT-EU
import	from AS13030 action pref=20; accept AS-INIT7
export	to AS13030 announce AS-BT-EU
import	from AS13335 action pref=20; accept AS-CLOUDFLARE
export	to AS13335 announce AS-BT-EU
import	from AS13445 action pref=20; accept AS-WEBEX
export	to AS13445 announce AS-BT-EU
import	from AS14061 action pref=20; accept AS14061
export	to AS14061 announce AS-BT-EU
import	from AS14907 action pref=20; accept AS-WIKIMEDIA
export	to AS14907 announce AS-BT-GLOBAL
import	from AS14340 action pref=20; accept AS14340
export	to AS14340 announce AS-BT-EU
import	from AS14361 action pref=20; accept AS-HOPONE
export	to AS14361 announce AS-BT-EU
import	from AS15169 action pref=20; accept AS-GOOGLE
export	to AS15169 announce AS-BT-EU
import	from AS15412 action pref=20; accept AS-FLAGP
export	to AS15412 announce AS-BT-EU
import	from AS15594 action pref=20; accept AS-NQ
export	to AS15594 announce AS-BT-EU
import	from AS15635 action pref=20; accept AS15635
export	to AS15635 announce AS-BT-EU
import	from AS15695 action pref=20; accept AS-EXPEREO
export	to AS15695 announce AS-BT-GLOBAL
import	from AS15830 action pref=20; accept AS-TELECITYGROUP
export	to AS15830 announce AS-BT-EU
import	from AS15965 action pref=20; accept AS-CEGECOM
export	to AS15965 announce AS-BT-EU
import	from AS16004 action pref=20; accept AS16004
export	to AS16004 announce AS-BT-EU
import	from AS16086 action pref=20; accept AS-FINNET
export	to AS16086 announce AS-BT-EU
import	from AS16097 action pref=20; accept AS-HLKOMM
export	to AS16097 announce AS-BT-EU
import	from AS16276 action pref=20; accept AS-OVH
export	to AS16276 announce AS-BT-EU
import	from AS16338 action pref=20; accept AS-AUNANET
export	to AS16338 announce AS-BT-EU
import	from AS16509 action pref=20; accept AS-AMAZON
export	to AS16509 announce AS-BT-EU
import	from AS19080 action pref=20; accept AS-WBS
export	to AS19080 announce AS-BT-EU
import	from AS19318 action pref=20; accept AS-NJIIX
export	to AS19318 announce AS-BT-EU
import	from AS19548 action pref=20; accept AS-ADELPHIA
export	to AS19548 announce AS-BT-EU
import	from AS19679 action pref=20; accept AS-DROPBOX
export	to AS19679 announce AS-BT-EU
import	from AS20473 action pref=20; accept AS-CHOOPA
export	to AS20473 announce AS-BT-EU
import	from AS20676 action pref=20; accept AS-QSC
export	to AS20676 announce AS-BT-EU
import	from AS20721 action pref=20; accept AS20721
export	to AS20721 announce AS-BT-EU
import	from AS20940 action pref=20; accept AS-AKAMAI
export	to AS20940 announce AS-BT-EU
import	from AS20965 action pref=20; accept AS-GEANTNRN
export	to AS20965 announce AS-BT-EU
import	from AS21277 action pref=20; accept AS-NT
export	to AS21277 announce AS-BT-EU
import	from AS21859 action pref=20; accept AS21859
export	to AS21859 announce AS-BT-EU
import	from AS22212 action pref=20; accept AS-INTERNAP
export	to AS22212 announce AS-BT-EU
import	from AS24875 action pref=20; accept AS24940
export	to AS24875 announce AS-BT-EU
import	from AS24940 action pref=20; accept AS24940
export	to AS24940 announce AS-BT-EU
import	from AS24961 action pref=20; accept AS-MYLOC
export	to AS24961 announce AS-BT-EU
import	from AS25152 action pref=20; accept AS25152
export	to AS25152 announce AS-BT-EU
import	from AS25973 action pref=20; accept AS-MZIMA
export	to AS25973 announce AS-BT-EU
import	from AS27319 action pref=20; accept as27319:AS-PEERS
export	to AS27319 announce AS-BT-EU
import	from AS29518 action pref=20; accept AS-BREDBAND2
export	to AS29518 announce AS-BT-EU
import	from AS29119 action pref=20; accept AS-SERVIHOSTING
export	to AS29119 announce AS-BT-EU
import	from AS29405 action pref=20; accept AS-VNET
export	to AS29405 announce AS-BT-EU
import	from AS30081 action pref=20; accept AS-CACHENETWORKS
export	to AS30081 announce AS-BT-EU
import	from AS30103 action pref=20; accept AS30103
export	to AS30103 announce AS-BT-EU
import	from AS30781 action pref=20; accept AS-JAGUAR
export	to AS30781 announce AS-BT-EU
import	from AS31027 action pref=20; accept AS-NIANET
export	to AS31027 announce AS-BT-EU
import	from AS31449 action pref=20; accept AS-BELCENTER
export	to AS31449 announce AS-BT-EU
import	from AS31529 action pref=20; accept AS-DENIC-ANY
export	to AS31529 announce AS-BT-EU
import	from AS32590 action pref=20; accept AS-VALVE
export	to AS32590 announce AS-BT-EU
import	from AS32787 action pref=20; accept AS-PROLE
export	to AS32787 announce AS-BT-EU
import	from AS32934 action pref=20; accept AS32934
export	to AS32934 announce AS-BT-EU
import	from AS33353 action pref=20; accept AS-GAIKAI
export	to AS33353 announce AS-BT-EU
import	from AS33891 action pref=20; accept AS-CORE-BACKBONE
export	to AS33891 announce AS-BT-EU
import	from AS34442 action pref=20; accept AS-XIFOS
export	to AS34442 announce AS-BT-EU
import	from AS35280 action pref=20; accept AS-F5
export	to AS35280 announce AS-BT-EU
import	from AS36119 action pref=20; accept AS-IMEEM
export	to AS36119 announce AS-BT-EU
import	from AS36351 action pref=20; accept AS36351
export	to AS36351 announce AS-BT-EU
import	from AS36692 action pref=20; accept AS-OPENDNS
export	to AS36692 announce AS-BT-EU
import	from AS37100 action pref=20; accept AS-SET-SEACOM
export	to AS37100 announce AS-BT-EU
import	from AS37468 action pref=20; accept AS-ANGOLACABLES
export	to AS37468 announce AS-BT-GLOBAL
import	from AS39737 action pref=20; accept AS-39737
export	to AS39737 announce AS-BT-EU
import	from AS39743 action pref=20; accept AS-VOXILITY-SET
export	to AS39743 announce AS-BT-EU
import	from AS40009 action pref=20; accept AS-BITGRAVITY
export	to AS40009 announce AS-BT-EU
import	from AS42708 action pref=20; accept AS-PORTLANE
export	to AS42708 announce AS-BT-EU
import	from AS43996 action pref=20; accept AS-BOOKING
export	to AS43996 announce AS-BT-EU
import	from AS44034 action pref=20; accept AS-Hi3G
export	to AS44034 announce AS-BT-EU
import	from AS45102 action pref=20; accept AS-ALIBABA-CN-NET
export	to AS45102 announce AS-BT-EU
import	from AS45489 action pref=20; accept AS-SLT-GLOBAL
export	to AS45489 announce AS-BT-EU
import	from AS46489 action pref=20; accept AS46489:AS-JUSTINTV
export	to AS46489 announce AS-BT-EU
import	from AS47447 action pref=20; accept AS-23MEDIA
export	to AS47447 announce AS-BT-EU
import	from AS49544 action pref=20; accept AS-INTERACTIVE3D
export	to AS49544 announce AS-BT-EU
import	from AS49981 action pref=20; accept AS-WORLDSTREAM
export	to AS49981 announce AS-BT-EU
import	from AS50304 action pref=20; accept AS-BLIX
export	to AS50304 announce AS-BT-EU
import	from AS52320 action pref=20; accept AS-GNT
export	to AS52320 announce AS-BT-EU
import	from AS53766 action pref=20; accept AS-VMWARE-SASE
export	to AS53766 announce AS-BT-EU
import	from AS54994 action pref=20; accept AS54994
export	to AS54994 announce AS-BT-EU
import	from AS55256 action pref=20; accept AS-NETSKOPE
export	to AS55256 announce AS-BT-EU
import	from AS56665 action pref=20; accept AS-PROXIMUS
export	to AS56665 announce AS-BT-EU
import	from AS57976 action pref=20; accept AS57976
export	to AS57976 announce AS-BT-EU
import	from AS58453 action pref=20; accept AS-CMI-ALL
export	to AS58453 announce AS-BT-EU
import	from AS60064 action pref=20; accept AS-HOSTPALACE
export	to AS60064 announce AS-BT-EU
import	from AS60068 action pref=20; accept AS-CDN77
export	to AS60068 announce AS-BT-EU
import	from AS61215 action pref=20; accept AS61215
export	to AS61215 announce AS-BT-EU
import	from AS62955 action pref=20; accept AS62955
export	to AS62955 announce AS-BT-EU
import	from AS63949 action pref=20; accept AS-LINODE
export	to AS63949 announce AS-BT-EU
import	from AS132203 action pref=20; accept AS-TENCENT
export	to AS132203 announce AS-BT-EU
import	from AS132876 action pref=20; accept AS-132876
export	to AS132876 announce AS-BT-EU
import	from AS139057 action pref=20; accept AS139057:AS-CONE
export	to AS139057 announce AS-BT-EU
import	from AS199524 action pref=20; accept AS-GCORE
export	to AS199524 announce AS-BT-EU
import	from AS202276 action pref=20; accept AS-IBOSS
export	to AS202276 announce AS-BT-EU
import	from AS394070 action pref=20; accept AS-394070
export	to AS394070 announce AS-BT-EU
import	from AS396986 action pref=20; accept AS-BYTEDANCE
export	to AS396986 announce AS-BT-EU
admin-c	CIA1-RIPE
tech-c	BS1836-RIPE
status	ASSIGNED
mnt-by	RIPE-NCC-END-MNT
remarks
remarks	ALL peering requests see
remarks	www.bt.net/cgi-bin/peering-request
remarks
remarks	for technical issues, pls contact: peering@bt.com
remarks
remarks	for abuse, pls contact abuse@eu.bt.net
remarks
remarks	24/7 NOC email / network@bt.com
remarks	24/7 NOC phone / +44 203 7882214 opt 1
remarks
remarks	This object describes non-customer peerings
remarks	Customer peerings are described in the macro AS-BT-XX
remarks	(replace XX with the country code NL, UK, BE, IE,etc)
remarks
remarks	Communities scheme:
remarks	The following BGP communities can be set by BT
remarks	BGP customers to affect announcements to major peers.
remarks
remarks	******************************************************
remarks
remarks	5400:NXXX
remarks	N=1 not announce
remarks	N=2 prepend an extra "5400 5400" on announcement
remarks	Valid values for XXX:
remarks	000 All peers and transits
remarks	500 All transits
remarks	503 Colt AS3356
remarks	509 Arelion AS1299
remarks	002 Sprint AS1239
remarks	004 Vodafone Global Network AS1273
remarks	005 Verizon EMEA AS702
remarks	014 DTAG AS3320
remarks	016 Orange AS5511
remarks	018 Tata Communications Ltd AS6453
remarks	023 GTT Communications AS3257
remarks	045 Telecom Italia Sparkle AS6762
remarks	073 GTT Communications AS286
remarks	169 Cogent AS174
remarks	177 Telxius Cable AS12956
remarks	177 Telefonica Germany GmbH AS6805
remarks	190 Comcast AS7922
remarks	191 Highwinds Network Group AS12989
remarks	300 All other peers
remarks	------------------------------------------------------
remarks
remarks	AS5400 is matching RPKI validation state and reject
remarks	invalid prefixes from peers and customers.
remarks
remarks	Our looking-glass marks validation state for all
remarks	prefixes : http://www.bt.net/looking-glass.html
remarks
remarks	Please review your registered ROAs to reduce number
remarks	of invalid prefixes.
remarks
remarks	------------------------------------------------------
mnt-by	CIP-MNT
created	2002-08-29T09:47:11Z
last-modified	2026-03-18T06:09:10Z
source	RIPE