BGP map for 163.203.0.0/18

163.203.0.0/18 is announced by AS3741 Dimension Data and seen by 331 peers of 23 RIPE RIS collectors, over 261 different AS paths. Its busiest upstreams are AS3356 Level 3 Parent, LLC (27%), AS2914 NTT America, Inc. (27%) and AS174 Cogent Communications, LLC (20%). The most common path, used by 10 peers, is AS24482 AS3741.

Routes checked 17:40:59 UTC

No change in the origin, the upstreams or the number of peers since 14:26 UTC on 28 Oct, when this site first looked at 163.203.0.0/18.

AS-path graph toward 163.203.0.0/18

origin Tier 1Tier 2edge network prefix best path: chosen by 10 of 331 peers (3%) number on a line = peers using that link RIS data up to 17:40 UTC what the colours mean 12 of 261 paths drawn 4 quieter networks left out

View JSON Raw upstream

331collector peers

23RIS collectors

261distinct AS paths

3.3average AS hops, 2 to 6

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS3356 Level 3 Parent, LLC	90	27%
AS2914 NTT America, Inc.	88	27%
AS174 Cogent Communications, LLC	66	20%
AS6461 Zayo Bandwidth	15	5%
AS13030 INIT7 Init7 (Switzerland) Ltd.	11	3%
AS24482 SG.GS	10	3%
AS3491 PCCW Global (HK) Ltd.	10	3%
AS3303 SWISSCOM Swisscom (Schweiz) AG	5	2%
AS33891 CORE-BACKBONE Core-Backbone GmbH	5	2%
AS48185 team_blue team.blue NV	3	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS3356 Level 3 Parent, LLC	90	27%
AS2914 NTT America, Inc.	85	26%
AS174 Cogent Communications, LLC	66	20%
AS1299 TWELVE99 Arelion Sweden AB	19	6%
AS6461 Zayo Bandwidth	10	3%
AS3491 PCCW Global (HK) Ltd.	7	2%
AS3320 DTAG Deutsche Telekom AG	7	2%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	7	2%
AS13030 INIT7 Init7 (Switzerland) Ltd.	7	2%
AS3303 SWISSCOM Swisscom (Schweiz) AG	5	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	AS24482 AS3741	10	3%	10
2	AS8218 AS6461 AS3741	7	2%	6
3	AS6461 AS3741	5	2%	5
4	AS13030 AS3741	4	1%	4
5	AS9002 AS2914 AS3741	4	1%	4
6	AS14840 AS3356 AS3741	4	1%	2
7	AS2914 AS3741	3	<1%	3
8	AS3491 AS3741	3	<1%	3
9	AS48185 AS3741	3	<1%	3
10	AS199524 AS3491 AS3741	3	<1%	3
11	AS35280 AS2914 AS3741	3	<1%	3
12	AS34019 AS3303 AS3741	3	<1%	3
13	AS25160 AS3741	2	<1%	2
14	AS49544 AS3741	2	<1%	2
15	AS3257 AS3356 AS3741	2	<1%	2
16	AS6830 AS3356 AS3741	2	<1%	2
17	AS3320 AS2914 AS3741	2	<1%	2
18	AS62167 AS3356 AS3741	2	<1%	2
19	AS1299 AS174 AS3741	2	<1%	2
20	AS55720 AS2914 AS3741	2	<1%	1
21	AS50628 AS3356 AS3741	2	<1%	2
22	AS49544 AS3356 AS3741	2	<1%	1
23	AS31027 AS12552 AS3741	2	<1%	1
24	AS49544 AS2914 AS3741	2	<1%	2
25	AS8529 AS3356 AS3741	2	<1%	2
26	AS15547 AS174 AS3741	2	<1%	2
27	AS12779 AS2914 AS3741	2	<1%	2
28	AS199524 AS2914 AS3741	2	<1%	2
29	AS47692 AS2914 AS3741	2	<1%	2
30	AS59890 AS3356 AS3741	2	<1%	2
31	AS25091 AS3356 AS3741	2	<1%	2
32	AS271253 AS3356 AS3741	2	<1%	1
33	AS19151 AS2914 AS3741	2	<1%	2
34	AS58057 AS34549 AS2914 AS3741	2	<1%	2
35	AS35710 AS3320 AS3356 AS3741	2	<1%	2
36	AS51185 AS6762 AS2914 AS3741	2	<1%	2
37	AS51184 AS47692 AS2914 AS3741	2	<1%	2
38	AS48362 AS1764 AS2914 AS3741	2	<1%	2
39	AS47147 AS3320 AS3356 AS3741	2	<1%	2
40	AS47147 AS1299 AS174 AS3741	2	<1%	2
41	AS20612 AS9044 AS2914 AS3741	2	<1%	1
42	AS142289 AS9583 AS6453 AS174 AS3741	2	<1%	1
43	AS1828 AS3741	1	<1%	1
44	AS37721 AS3741	1	<1%	1
45	AS36236 AS3741	1	<1%	1
46	AS18106 AS3741	1	<1%	1
47	AS8426 AS3741	1	<1%	1
48	AS8455 AS3741	1	<1%	1
49	AS6667 AS3741	1	<1%	1
50	AS327983 AS3741	1	<1%	1

50 of 261 paths shown. All of them are in the JSON.

More prefixes from AS3741

Routes seen by RIPE RIS in the 24 hours up to 8 Nov 2026, 17:40 UTC, fetched just now.