AS3300 British Telecommunications Limited 🇬🇧 GB

Announcing 152 prefixes, seen at the RIS collectors.

IPv4 prefixes

123

604,416 (2,361 × /24)

IPv6 prefixes

3 × /32

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS3300
Name: British Telecommunications Limited
Organisation: British Telecom GIIB
Country: 🇬🇧 GB
RIR: RIPENCC
Allocated: 1994-10-28
Network type: Cable/DSL/ISP
Traffic levels: 100-1000Mbps
Scope: Global
Peering policy: Selective
IRR as-set: AS-BT-GLOBAL
Website: http://www.bt.net
PeeringDB: net/257
Exchanges: 16

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

108 valid (71.1%) 0 invalid (0.0%) 44 no ROA (28.9%)

Upstreams

Networks seen providing transit to this one

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS1299 Arelion (fka. Telia Carrier)	🇸🇪 SE	68,634	132	1,654	CAIDA
AS2914 NTT America, Inc.	🇺🇸 US	55,107	1,607	1,313	CAIDA
AS6762 Telecom Italia Sparkle (Seabone)	🇮🇹 IT	52,370	288	180	CAIDA
AS3491 PCCW Global (HK) Ltd.	🇭🇰 HK	51,043	532	548	CAIDA
AS6461 Zayo Bandwidth	🇺🇸 US	50,518	212	59	CAIDA
AS4637 Telstra International Limited	🇭🇰 HK	36,879	666	930	CAIDA
AS4657 StarHub Ltd	🇸🇬 SG	29,155	209	554	CAIDA
AS33891 Core-Backbone GmbH	🇩🇪 DE	24,638	1	133	inferred
AS30844 Liquid Intelligent Technologies	🇬🇧 GB	21,631	290	99	CAIDA
AS31713 Gateway Communications	🇧🇪 BE	17,321	255	2	CAIDA
AS20473 The Constant Company, LLC	🇺🇸 US	17,259	1,777	20	inferred
AS4635 HKIX Route Servers	🇭🇰 HK	0	0	12	inferred

Peers

Adjacencies that look settlement-free rather than transit

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS6939 Hurricane Electric LLC	🇺🇸 US	53,587	236	1,272	CAIDA
AS9002 RETN Limited	🇬🇧 GB	50,584	19	752	CAIDA
AS37721 Virtual Technologies & Solutions	🇧🇫 BF	21,545	64	8	CAIDA
AS3303 Swisscom (Schweiz) AG	🇨🇭 CH	20,286	345	60	CAIDA
AS9304 HGC Global Communications Limited	🇭🇰 HK	6,130	1,979	12	CAIDA
AS24482 SG.GS	🇸🇬 SG	4,638	45	39	CAIDA
AS55720 Gigabit Hosting Sdn Bhd	🇲🇾 MY	141	278	68	CAIDA
AS22652 Videotron Ltee	🇨🇦 CA	108	156	133	CAIDA
AS12200 Rackspace Hosting	🇺🇸 US	27	16	8	CAIDA
AS58057 Securebit AG	🇨🇭 CH	19	14	2	CAIDA
AS1403 EBOX	🇨🇦 CA	5	223	153	CAIDA
AS14907 Wikimedia Foundation Inc.	🇺🇸 US	0	11	134	CAIDA

Downstreams

Networks this one appears to provide transit to

Network	Country	Cone	IPv4 prefixes	Paths	Source
AS45187 Rackspace IT Hosting AS IT Hosting Provider Hong Kong	🇭🇰 HK	2	13	125	CAIDA
AS7246 Bristol-Myers Squibb Company	🇺🇸 US	0	32	423	CAIDA
AS136767 BMW AG (Bayerische Motoren Werke Aktiengesellschaft)	🇩🇪 DE	0	5	228	CAIDA
AS72 Schlumberger Limited	🇺🇸 US	0	138	205	CAIDA
AS22683 Koninklijke Philips N.V.	🇳🇱 NL	0	10	164	CAIDA
AS18872 Cohesity, Inc.	🇺🇸 US	0	3	156	CAIDA
AS40659 BMW of North America, LLC (Group Data Centers America)	🇺🇸 US	0	2	147	CAIDA
AS399449 Kyndryl	🇺🇸 US	0	6	123	CAIDA
AS78 BT Americas, Inc	🇺🇸 US	0	3	123	CAIDA
AS212565 Specsavers Optical Group Limited	🇬🇬 GG	0	8	82	CAIDA
AS141399 Specsavers Pty Ltd	🇦🇺 AU	0	2	82	CAIDA
AS393493 Lotte Biologics USA, LLC	🇺🇸 US	0	1	41	CAIDA
AS26478 Novartis Pharmaceuticals	🇺🇸 US	0	6	41	CAIDA
AS27000 Coty Inc.	🇺🇸 US	0	1	41	CAIDA
AS133782 Elsevier Ltd	🇯🇵 JP	0	2	40	CAIDA
AS55290 Depository Trust & Clearing Corporation	🇺🇸 US	0	24	26	CAIDA
AS6220 inContact Inc.	🇺🇸 US	0	90	26	CAIDA
AS40126 Molson Coors Beverage Company	🇺🇸 US	0	4	9	CAIDA
AS26380 MasterCard Technologies LLC	🇺🇸 US	0	68	2	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.