BGP map for 2a01:4c8:f400::/48

2a01:4c8:f400::/48 is announced by AS2856 BT-UK-AS and seen by 335 peers of 23 RIPE RIS collectors, over 247 different AS paths. Its busiest upstreams are AS5400 BT (70%), AS9002 RETN-AS (9%) and AS6461 Zayo Bandwidth (4%). The most common path, used by 9 peers, is AS6939 AS5400 AS2856.

Routes checked 22:06:21 UTC

No change in the origin, the upstreams or the number of peers since 22:06 UTC, when this site first looked at 2a01:4c8:f400::/48.

AS-path graph toward 2a01:4c8:f400::/48

origin Tier 1Tier 2edge network prefix best path: chosen by 9 of 335 peers (3%) number on a line = peers using that link RIS data up to 22:05 UTC what the colours mean 12 of 247 paths drawn 2 quieter networks left out

Download PNG View JSON Raw upstream

335collector peers

23RIS collectors

247distinct AS paths

3.6average AS hops, 1 to 6

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS5400 BT British Telecommunications Limited	236	70%
AS9002 RETN-AS RETN Limited	29	9%
AS6461 Zayo Bandwidth	13	4%
AS13030 INIT7 Init7 (Switzerland) Ltd.	10	3%
AS3303 SWISSCOM Swisscom (Schweiz) AG	10	3%
AS60068 CDN77 Datacamp Limited	4	1%
AS5405 INTERDOTLINK Inter.link GmbH	4	1%
AS48185 team_blue team.blue NV	3	<1%
AS51185 MAINSTREAMING-AS MainStreaming SpA	2	<1%
AS6667 EUNET-FINLAND Elisa Oyj	2	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS5400 BT British Telecommunications Limited	235	70%
AS6939 Hurricane Electric LLC	56	17%
AS1299 TWELVE99 Arelion Sweden AB	39	12%
AS3356 Level 3 Parent, LLC	32	10%
AS9002 RETN-AS RETN Limited	24	7%
AS2914 NTT America, Inc.	16	5%
AS3303 SWISSCOM Swisscom (Schweiz) AG	10	3%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	9	3%
AS6461 Zayo Bandwidth	8	2%
AS3257 GTT-BACKBONE GTT Communications Inc.	8	2%

AS paths

Every distinct path the collector peers use, most common first. An ASN repeated to lengthen a path (a prepend) is shown once.

#	Path, collector peer to origin	Peers	Share	Collectors
1	AS6939 AS5400 AS2856	9	3%	9
2	AS24482 AS2914 AS3356 AS5400 AS2856	8	2%	8
3	AS8218 AS5400 AS2856	7	2%	6
4	AS9002 AS2856	5	1%	5
5	AS6461 AS2856	5	1%	5
6	AS13030 AS2856	4	1%	4
7	AS58057 AS6939 AS5400 AS2856	4	1%	3
8	AS12779 AS2914 AS3356 AS5400 AS2856	4	1%	4
9	AS48185 AS2856	3	<1%	3
10	AS34019 AS3303 AS2856	3	<1%	3
11	AS48362 AS9002 AS2856	3	<1%	3
12	AS3491 AS5400 AS2856	3	<1%	3
13	AS15547 AS3303 AS2856	3	<1%	3
14	AS2914 AS3356 AS5400 AS2856	3	<1%	3
15	AS199524 AS1299 AS5400 AS2856	3	<1%	3
16	AS14840 AS3356 AS5400 AS2856	3	<1%	2
17	AS49544 AS3356 AS5400 AS2856	3	<1%	2
18	AS3214 AS6939 AS5400 AS2856	3	<1%	3
19	AS51185 AS2856	2	<1%	2
20	AS6667 AS2856	2	<1%	2
21	AS49544 AS2856	2	<1%	2
22	AS2497 AS5400 AS2856	2	<1%	2
23	AS199524 AS5400 AS2856	2	<1%	2
24	AS6762 AS5400 AS2856	2	<1%	2
25	AS37721 AS6461 AS2856	2	<1%	1
26	AS31027 AS5400 AS2856	2	<1%	1
27	AS8529 AS137409 AS2856	2	<1%	2
28	AS1299 AS5400 AS2856	2	<1%	2
29	AS3257 AS5400 AS2856	2	<1%	2
30	AS3320 AS5400 AS2856	2	<1%	2
31	AS6830 AS5400 AS2856	2	<1%	2
32	AS917 AS60068 AS2856	2	<1%	2
33	AS59890 AS60068 AS2856	2	<1%	2
34	AS19151 AS174 AS5400 AS2856	2	<1%	2
35	AS14907 AS6939 AS5400 AS2856	2	<1%	2
36	AS34927 AS6939 AS5400 AS2856	2	<1%	1
37	AS47692 AS6939 AS5400 AS2856	2	<1%	2
38	AS51184 AS6939 AS5400 AS2856	2	<1%	2
39	AS12859 AS1299 AS5400 AS2856	2	<1%	1
40	AS25160 AS1299 AS5400 AS2856	2	<1%	2
41	AS47147 AS1299 AS5400 AS2856	2	<1%	2
42	AS62167 AS6939 AS5400 AS2856	2	<1%	2
43	AS202032 AS6939 AS5400 AS2856	2	<1%	2
44	AS28917 AS3257 AS5400 AS2856	2	<1%	1
45	AS24482 AS2914 AS1299 AS5400 AS2856	2	<1%	2
46	AS1403 AS577 AS6939 AS5400 AS2856	2	<1%	1
47	AS142289 AS9583 AS1299 AS5400 AS2856	2	<1%	1
48	AS206271 AS60707 AS12735 AS9121 AS5400 AS2856	2	<1%	1
49	AS2856	1	<1%	1
50	AS17639 AS2856	1	<1%	1

50 of 247 paths shown. All of them are in the JSON.

More prefixes from AS2856

Routes seen by RIPE RIS in the 24 hours up to 15 Sep 2026, 22:05 UTC, fetched just now.