BGP map for 163.203.0.0/18

163.203.0.0/18 is announced by AS3741 Dimension Data and seen by 333 peers of 23 RIPE RIS collectors, over 258 different AS paths. Its busiest upstreams are AS3356 Level 3 Parent, LLC (28%), AS2914 NTT America, Inc. (27%) and AS174 Cogent Communications, LLC (19%). The most common path, used by 11 peers, is AS24482 AS3741.

Routes checked 22:54:36 UTC

No change in the origin, the upstreams or the number of peers since 22:54 UTC, 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 11 of 333 peers (3%) number on a line = peers using that link RIS data up to 22:54 UTC what the colours mean 12 of 258 paths drawn 3 quieter networks left out

Download PNG View JSON Raw upstream

333collector peers

23RIS collectors

258distinct AS paths

3.2average AS hops, 2 to 5

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS3356 Level 3 Parent, LLC	92	28%
AS2914 NTT America, Inc.	89	27%
AS174 Cogent Communications, LLC	63	19%
AS6461 Zayo Bandwidth	16	5%
AS13030 INIT7 Init7 (Switzerland) Ltd.	12	4%
AS24482 SG.GS	11	3%
AS3491 PCCW Global (HK) Ltd.	10	3%
AS3303 SWISSCOM Swisscom (Schweiz) AG	5	2%
AS48185 team_blue team.blue NV	3	<1%
AS33891 CORE-BACKBONE Core-Backbone GmbH	3	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS3356 Level 3 Parent, LLC	92	28%
AS2914 NTT America, Inc.	86	26%
AS174 Cogent Communications, LLC	63	19%
AS1299 TWELVE99 Arelion Sweden AB	20	6%
AS6461 Zayo Bandwidth	11	3%
AS13030 INIT7 Init7 (Switzerland) Ltd.	8	2%
AS3491 PCCW Global (HK) Ltd.	7	2%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	7	2%
AS3320 DTAG Deutsche Telekom AG	6	2%
AS9002 RETN-AS RETN Limited	6	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	11	3%	11
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	AS12779 AS2914 AS3741	4	1%	4
7	AS14840 AS3356 AS3741	4	1%	2
8	AS2914 AS3741	3	<1%	3
9	AS3491 AS3741	3	<1%	3
10	AS48185 AS3741	3	<1%	3
11	AS199524 AS3491 AS3741	3	<1%	3
12	AS35280 AS2914 AS3741	3	<1%	3
13	AS34019 AS3303 AS3741	3	<1%	3
14	AS199524 AS174 AS3741	3	<1%	3
15	AS51185 AS6762 AS3356 AS3741	3	<1%	3
16	AS25160 AS3741	2	<1%	2
17	AS49544 AS3741	2	<1%	2
18	AS3257 AS3356 AS3741	2	<1%	2
19	AS62167 AS3356 AS3741	2	<1%	2
20	AS1299 AS174 AS3741	2	<1%	2
21	AS55720 AS2914 AS3741	2	<1%	1
22	AS50628 AS3356 AS3741	2	<1%	2
23	AS49544 AS3356 AS3741	2	<1%	1
24	AS31027 AS12552 AS3741	2	<1%	1
25	AS49544 AS2914 AS3741	2	<1%	2
26	AS8529 AS3356 AS3741	2	<1%	2
27	AS15547 AS174 AS3741	2	<1%	2
28	AS6762 AS3356 AS3741	2	<1%	2
29	AS199524 AS2914 AS3741	2	<1%	2
30	AS47692 AS2914 AS3741	2	<1%	2
31	AS59890 AS3356 AS3741	2	<1%	2
32	AS25091 AS3356 AS3741	2	<1%	2
33	AS271253 AS3356 AS3741	2	<1%	1
34	AS19151 AS2914 AS3741	2	<1%	2
35	AS34927 AS1299 AS174 AS3741	2	<1%	2
36	AS58057 AS34549 AS2914 AS3741	2	<1%	2
37	AS35710 AS3320 AS3356 AS3741	2	<1%	2
38	AS51184 AS47692 AS2914 AS3741	2	<1%	2
39	AS48362 AS1764 AS2914 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	AS36924 AS3741	1	<1%	1
44	AS1828 AS3741	1	<1%	1
45	AS37721 AS3741	1	<1%	1
46	AS36236 AS3741	1	<1%	1
47	AS18106 AS3741	1	<1%	1
48	AS8426 AS3741	1	<1%	1
49	AS8455 AS3741	1	<1%	1
50	AS6667 AS3741	1	<1%	1

50 of 258 paths shown. All of them are in the JSON.

More prefixes from AS3741

Routes seen by RIPE RIS in the 24 hours up to 15 Sep 2026, 22:54 UTC, fetched just now.