BGP map for 203.145.208.0/20

203.145.208.0/20 is announced by AS7539 National Center for High-performance Computing and seen by 332 peers of 23 RIPE RIS collectors, over 258 different AS paths. Its busiest upstreams are AS6461 Zayo Bandwidth (81%), AS6939 Hurricane Electric LLC (8%) and AS9924 Taiwan Fixed Network, Telco and Network Service Provider. (7%). The most common path, used by 7 peers, is AS8218 AS6461 AS7539.

Routes checked 17:03:32 UTC

No change in the origin, the upstreams or the number of peers since 06:57 UTC on 28 Oct, when this site first looked at 203.145.208.0/20.

AS-path graph toward 203.145.208.0/20

origin Tier 1Tier 2transitedge network prefix best path: chosen by 7 of 332 peers (2%) number on a line = peers using that link RIS data up to 17:02 UTC what the colours mean 12 of 258 paths drawn 5 quieter networks left out

View JSON Raw upstream

332collector peers

23RIS collectors

258distinct AS paths

3.7average AS hops, 2 to 7

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS6461 Zayo Bandwidth	270	81%
AS6939 Hurricane Electric LLC	26	8%
AS9924 Taiwan Fixed Network, Telco and Network Service Provider.	24	7%
AS24482 SG.GS	3	<1%
AS7575 Australian Academic and Research Network (AARNet)	2	<1%
AS11537 Internet2	2	<1%
AS38254 Internet Technology Laboratory	1	<1%
AS134823 Sky Digital Co., Ltd.	1	<1%
AS7713 PT Telekomunikasi Indonesia	1	<1%
AS293 ESnet	1	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS6461 Zayo Bandwidth	265	80%
AS1299 TWELVE99 Arelion Sweden AB	32	10%
AS6939 Hurricane Electric LLC	26	8%
AS3356 Level 3 Parent, LLC	25	8%
AS9924 Taiwan Fixed Network, Telco and Network Service Provider.	23	7%
AS2914 NTT America, Inc.	19	6%
AS3491 PCCW Global (HK) Ltd.	16	5%
AS174 Cogent Communications, LLC	12	4%
AS6453 TATA COMMUNICATIONS (AMERICA) INC	9	3%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	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	AS8218 AS6461 AS7539	7	2%	6
2	AS24482 AS6461 AS7539	7	2%	7
3	AS6461 AS7539	5	2%	5
4	AS13030 AS6461 AS7539	4	1%	4
5	AS9002 AS6461 AS7539	4	1%	4
6	AS47147 AS6461 AS7539	4	1%	4
7	AS14840 AS3356 AS6461 AS7539	4	1%	2
8	AS24482 AS7539	3	<1%	3
9	AS2914 AS6461 AS7539	3	<1%	3
10	AS3491 AS9924 AS7539	3	<1%	3
11	AS48185 AS6461 AS7539	3	<1%	3
12	AS3214 AS6461 AS7539	3	<1%	3
13	AS34019 AS6461 AS7539	3	<1%	3
14	AS25091 AS6461 AS7539	3	<1%	3
15	AS34927 AS1299 AS6461 AS7539	3	<1%	3
16	AS51185 AS6762 AS6461 AS7539	3	<1%	3
17	AS199524 AS3491 AS9924 AS7539	3	<1%	3
18	AS3257 AS6461 AS7539	2	<1%	2
19	AS6830 AS6461 AS7539	2	<1%	2
20	AS3320 AS6461 AS7539	2	<1%	2
21	AS1299 AS6461 AS7539	2	<1%	2
22	AS8529 AS6939 AS7539	2	<1%	2
23	AS15547 AS6461 AS7539	2	<1%	2
24	AS12779 AS6461 AS7539	2	<1%	2
25	AS6762 AS6461 AS7539	2	<1%	2
26	AS59890 AS6939 AS7539	2	<1%	2
27	AS2497 AS6461 AS7539	2	<1%	2
28	AS62167 AS3356 AS6461 AS7539	2	<1%	2
29	AS25160 AS2914 AS6461 AS7539	2	<1%	2
30	AS58057 AS34549 AS6461 AS7539	2	<1%	2
31	AS49544 AS3356 AS6461 AS7539	2	<1%	1
32	AS31027 AS6797 AS6461 AS7539	2	<1%	1
33	AS35710 AS3320 AS6461 AS7539	2	<1%	2
34	AS14907 AS3491 AS9924 AS7539	2	<1%	2
35	AS51184 AS1764 AS6461 AS7539	2	<1%	2
36	AS48362 AS9002 AS6461 AS7539	2	<1%	2
37	AS199524 AS1299 AS6461 AS7539	2	<1%	2
38	AS47692 AS2914 AS6461 AS7539	2	<1%	2
39	AS49544 AS3491 AS9924 AS7539	2	<1%	2
40	AS20612 AS8758 AS6461 AS7539	2	<1%	1
41	AS271253 AS3356 AS6461 AS7539	2	<1%	1
42	AS19151 AS2914 AS6461 AS7539	2	<1%	2
43	AS142289 AS9583 AS4755 AS6453 AS6461 AS7539	2	<1%	1
44	AS38254 AS7539	1	<1%	1
45	AS134823 AS7539	1	<1%	1
46	AS9924 AS7539	1	<1%	1
47	AS42473 AS6461 AS7539	1	<1%	1
48	AS3170 AS6461 AS7539	1	<1%	1
49	AS7018 AS6461 AS7539	1	<1%	1
50	AS50304 AS6461 AS7539	1	<1%	1

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

More prefixes from AS7539

Routes seen by RIPE RIS in the 24 hours up to 8 Nov 2026, 17:02 UTC, fetched just now.