206208 looking glass

AS5400 British Telecommunications (International) 🇬🇧 GB

British Telecommunications Limited. Announcing 126 prefixes, seen at the RIS collectors.

IPv4 prefixes
86
734,720 (2,870 × /24)
IPv6 prefixes
40
921 × /32
Upstreams
6
transit providers observed
Peers
20
settlement-free adjacencies
Downstreams
60
transit customers observed
Customer cone
309
ASes reachable through it

Registry and operator data

AS number
AS5400
Name
British Telecommunications (International)
Organisation
BT
Country
🇬🇧 GB
RIR
RIPENCC
Allocated
1995-08-15
Network type
NSP
Traffic levels
1-5Tbps
Scope
Europe
Peering policy
Restrictive
IRR as-set
AS-BT-EU
Website
http://www.bt.net
Looking glass
http://lg.bt.net/
PeeringDB
net/118
Exchanges
61
Facilities
141

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

98 valid (77.8%) 0 invalid (0.0%) 28 no ROA (22.2%)

Upstreams

Networks seen providing transit to this one

Network Country Cone IPv4 prefixes Paths Source
AS3356 Lumen (Level 3) 🇺🇸 US 71,003 2,084 4,095 CAIDA
AS1299 Arelion (fka. Telia Carrier) 🇸🇪 SE 68,265 134 9,543 CAIDA
AS2914 NTT America, Inc. 🇺🇸 US 54,911 1,564 65 CAIDA
AS6762 Telecom Italia Sparkle (Seabone) 🇮🇹 IT 51,600 288 1,163 CAIDA
AS4637 Telstra International Limited 🇭🇰 HK 37,111 666 1,095 CAIDA
AS7195 EdgeUno 🇨🇴 CO 28,645 129 33 inferred

Peers

Adjacencies that look settlement-free rather than transit

Network Country Cone IPv4 prefixes Paths Source
AS174 Cogent Communications, LLC 🇺🇸 US 65,600 3,997 3,600 CAIDA
AS3257 GTT Communications Inc. 🇺🇸 US 63,192 1,798 3,446 CAIDA
AS6453 TATA Communications (America) Inc 🇺🇸 US 56,013 124 1,051 CAIDA
AS6939 Hurricane Electric LLC 🇺🇸 US 53,108 185 5,354 CAIDA
AS5511 Orange S.A. 🇫🇷 FR 51,433 712 4 CAIDA
AS3491 PCCW Global (HK) Ltd. 🇭🇰 HK 50,599 532 371 CAIDA
AS9002 RETN Limited 🇬🇧 GB 50,196 18 899 CAIDA
AS3320 Deutsche Telekom AG 🇩🇪 DE 49,218 910 1 CAIDA
AS1273 Vodafone Group PLC 🇪🇺 EU 47,177 191 140 CAIDA
AS20485 TransTeleCom JSC 🇷🇺 RU 28,543 85 1,104 CAIDA
AS6830 Liberty Global Europe Holding B.V. 🇳🇱 NL 28,114 167 2 CAIDA
AS8447 A1 Telekom Austria AG 🇦🇹 AT 20,662 121 1 CAIDA
AS3303 Swisscom (Schweiz) AG 🇨🇭 CH 20,558 345 16 CAIDA
AS577 Bell Canada 🇨🇦 CA 19,913 16,190 469 CAIDA
AS1257 Tele2 Sverige AB 🇪🇺 EU 403 381 1 CAIDA
AS13030 Init7 (Switzerland) Ltd. 🇨🇭 CH 327 69 49 CAIDA
AS42708 Glesys AB 🇸🇪 SE 106 211 92 CAIDA
AS1836 green.ch AG 🇨🇭 CH 45 78 1,268 CAIDA
AS50304 Blix Solutions AS 🇳🇴 NO 34 103 865 CAIDA
AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC) 🇳🇱 NL 0 7 1,187 CAIDA

Downstreams

Networks this one appears to provide transit to

Network Country Cone IPv4 prefixes Paths Source
AS2856 British Telecommunications 🇬🇧 GB 153 537 22,788 CAIDA
AS8903 LYNTIA NETWORKS S.A. 🇪🇸 ES 74 111 18 CAIDA
AS8968 RETELIT-X S.R.L. 🇮🇹 IT 17 37 529 CAIDA
AS2110 Enet Communications LIMITED 🇮🇪 IE 14 16 798 CAIDA
AS29063 Eviden Netherlands B.V. 🇳🇱 NL 4 15 222 CAIDA
AS33873 Arvato Systems GmbH 🇩🇪 DE 2 26 375 CAIDA
AS12440 Hughes Network Systems GmbH 🇩🇪 DE 2 20 95 CAIDA
AS202666 International Flavors & Fragrances I.F.F. (Nederland) B.V 🇳🇱 NL 2 1 82 CAIDA
AS199541 EUROCONTROL 🇧🇪 BE 0 41 1,722 CAIDA
AS13205 British Telecommunications Limited 🇬🇧 GB 0 14 533 CAIDA
AS7246 Bristol-Myers Squibb Company 🇺🇸 US 0 32 396 CAIDA
AS21489 The North Atlantic Treaty Organization 🇧🇪 BE 0 7 286 CAIDA
AS15442 Procter & Gamble Service GmbH 🇩🇪 DE 0 9 261 CAIDA
AS21000 Atos France SAS 🇫🇷 FR 0 23 209 CAIDA
AS30614 Dell, Inc. 🇺🇸 US 0 20 181 CAIDA
AS72 Schlumberger Limited 🇺🇸 US 0 138 168 CAIDA
AS25049 Shell Information Technology International B.V. 🇳🇱 NL 0 12 164 CAIDA
AS15518 Circular Informationssysteme GmbH 🇩🇪 DE 0 5 141 CAIDA
AS212565 Specsavers Optical Group Limited 🇬🇬 GG 0 8 126 CAIDA
AS40126 Molson Coors Beverage Company 🇺🇸 US 0 4 124 CAIDA
AS22683 Koninklijke Philips N.V. 🇳🇱 NL 0 10 120 CAIDA
AS51046 Bringo Limited 🇮🇪 IE 0 5 111 CAIDA
AS3573 Accenture LLP 🇺🇸 US 0 116 102 inferred
AS16839 SERVICENOW, INC. 🇺🇸 US 0 113 94 CAIDA
AS34311 LG CNS Europe B.V 🇳🇱 NL 0 5 91 CAIDA
AS59724 Elsevier Limited 🇬🇧 GB 0 2 82 CAIDA
AS51466 Bridgestone Europe NV 🇧🇪 BE 0 2 82 CAIDA
AS40934 Fortinet Inc. 🇺🇸 US 0 342 75 CAIDA
AS12298 QIAGEN GmbH 🇩🇪 DE 0 3 68 CAIDA
AS203990 Accertify LLC 🇺🇸 US 0 2 58 CAIDA
AS34460 PHOENIX International Holdings GmbH 🇩🇪 DE 0 3 51 CAIDA
AS15466 Commando Materieel en IT 🇳🇱 NL 0 2 45 CAIDA
AS7734 Toronto Dominion Bank 🇨🇦 CA 0 54 42 CAIDA
AS394805 ReliaQuest, LLC 🇺🇸 US 0 2 42 CAIDA
AS48647 Solvay SA 🇧🇪 BE 0 2 41 CAIDA
AS30864 Elavon Financial Services DAC 🇮🇪 IE 0 6 41 CAIDA
AS208053 Clarins SAS 🇫🇷 FR 0 1 41 CAIDA
AS27311 Biogen MA Inc 🇺🇸 US 0 4 41 CAIDA
AS12734 Stellantis Auto SAS 🇫🇷 FR 0 2 39 CAIDA
AS10780 Pure Storage, INC. 🇺🇸 US 0 19 37 CAIDA
AS43949 Marsh Limited 🇬🇧 GB 0 11 35 CAIDA
AS13130 Autostadt GmbH 🇩🇪 DE 0 1 34 CAIDA
AS21433 Accenture UK Limited 🇬🇧 GB 0 324 34 CAIDA
AS202097 IBERMUTUA 🇪🇸 ES 0 1 32 CAIDA
AS206625 Enterprise Holdings, Inc. 🇺🇸 US 0 1 31 CAIDA
AS60112 Clarins SAS 🇫🇷 FR 0 1 29 CAIDA
AS12257 Dell, Inc. 🇺🇸 US 0 63 27 CAIDA
AS43033 Telio Communications GmbH 🇩🇪 DE 0 1 27 CAIDA
AS51527 Hyundai AutoEver Europe GmbH 🇩🇪 DE 0 5 27 CAIDA
AS28879 CECONOMY AG 🇩🇪 DE 0 1 26 CAIDA
AS12331 Audi AG 🇩🇪 DE 0 2 24 CAIDA
AS38191 Infosys Technologies Ltd 🇮🇳 IN 0 56 24 CAIDA
AS55290 Depository Trust & Clearing Corporation 🇺🇸 US 0 24 19 CAIDA
AS25261 IBERIA LINEAS AEREAS DE ESPANA SOCIEDAD ANONIMA OPERADORA 🇪🇸 ES 0 2 16 CAIDA
AS26380 MasterCard Technologies LLC 🇺🇸 US 0 68 16 CAIDA
AS20561 Schaeffler Technologies AG & Co. KG 🇩🇪 DE 0 1 16 CAIDA
AS5091 Stripe, Inc. 🇺🇸 US 0 19 15 CAIDA
AS200361 CONCENTRIX SERVICES BULGARIA EOOD 🇧🇬 BG 0 1 12 CAIDA
AS8590 Bayerische Motoren Werke Aktiengesellschaft 🇩🇪 DE 0 19 8 CAIDA
AS20868 ABB Information Systems Ltd 🇨🇭 CH 0 22 7 CAIDA

Relationships marked inferred come from where the two networks sit on the AS paths the collectors see, which is a guess and is wrong for some of them. The rest are stated by CAIDA's published inference over a much wider set of collectors.