BGP map for 128.9.31.0/24

128.9.31.0/24 is announced by AS4 University of Southern California and seen by 325 peers of 23 RIPE RIS collectors, over 246 different AS paths. All of those routes reach it through one upstream, AS174 Cogent Communications, LLC. The most common path, used by 10 peers, is AS24482 AS2914 AS174 AS4.

Routes checked 15:08:27 UTC

No change in the origin, the upstreams or the number of peers since 08:14 UTC on 26 Oct, when this site first looked at 128.9.31.0/24.

AS-path graph toward 128.9.31.0/24

origin Tier 1Tier 2edge network prefix best path: chosen by 10 of 325 peers (3%) number on a line = peers using that link RIS data up to 15:08 UTC what the colours mean 12 of 246 paths drawn 5 quieter networks left out

View JSON Raw upstream

325collector peers

23RIS collectors

246distinct AS paths

3.8average AS hops, 3 to 6

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS174 Cogent Communications, LLC	325	100%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS174 Cogent Communications, LLC	325	100%
AS1299 TWELVE99 Arelion Sweden AB	61	19%
AS2914 NTT America, Inc.	27	8%
AS3356 Level 3 Parent, LLC	25	8%
AS6453 TATA COMMUNICATIONS (AMERICA) INC	11	3%
AS6461 Zayo Bandwidth	9	3%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	8	2%
AS29169 GANDI-AS GANDI SAS	4	1%
AS34549 MEER-AS meerfarbig GmbH & Co. KG	4	1%
AS3320 DTAG Deutsche Telekom AG	4	1%

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 AS2914 AS174 AS4	10	3%	10
2	AS199524 AS174 AS4	7	2%	7
3	AS8218 AS6461 AS174 AS4	7	2%	6
4	AS6461 AS174 AS4	5	2%	5
5	AS12779 AS174 AS4	4	1%	4
6	AS14840 AS174 AS4	4	1%	2
7	AS13030 AS1299 AS174 AS4	4	1%	4
8	AS9002 AS3356 AS174 AS4	4	1%	4
9	AS47147 AS1299 AS174 AS4	4	1%	4
10	AS2914 AS174 AS4	3	<1%	3
11	AS3491 AS174 AS4	3	<1%	3
12	AS51185 AS6762 AS174 AS4	3	<1%	3
13	AS14907 AS1299 AS174 AS4	3	<1%	3
14	AS34019 AS29169 AS174 AS4	3	<1%	3
15	AS48362 AS1299 AS174 AS4	3	<1%	3
16	AS3257 AS174 AS4	2	<1%	2
17	AS6830 AS174 AS4	2	<1%	2
18	AS3320 AS174 AS4	2	<1%	2
19	AS62167 AS174 AS4	2	<1%	2
20	AS25160 AS174 AS4	2	<1%	2
21	AS1299 AS174 AS4	2	<1%	2
22	AS15547 AS174 AS4	2	<1%	2
23	AS6762 AS174 AS4	2	<1%	2
24	AS59890 AS174 AS4	2	<1%	2
25	AS271253 AS174 AS4	2	<1%	1
26	AS2497 AS174 AS4	2	<1%	2
27	AS19151 AS174 AS4	2	<1%	2
28	AS917 AS60068 AS174 AS4	2	<1%	2
29	AS42473 AS1299 AS174 AS4	2	<1%	2
30	AS34927 AS1299 AS174 AS4	2	<1%	2
31	AS58057 AS34549 AS174 AS4	2	<1%	2
32	AS49544 AS3356 AS174 AS4	2	<1%	1
33	AS31027 AS1299 AS174 AS4	2	<1%	1
34	AS35710 AS3320 AS174 AS4	2	<1%	2
35	AS49544 AS2914 AS174 AS4	2	<1%	2
36	AS8529 AS6453 AS174 AS4	2	<1%	2
37	AS35280 AS3356 AS174 AS4	2	<1%	2
38	AS51184 AS1764 AS174 AS4	2	<1%	2
39	AS49544 AS1299 AS174 AS4	2	<1%	2
40	AS20612 AS9044 AS174 AS4	2	<1%	1
41	AS47692 AS33891 AS3356 AS174 AS4	2	<1%	2
42	AS142289 AS9583 AS4755 AS6453 AS174 AS4	2	<1%	1
43	AS15692 AS174 AS4	1	<1%	1
44	AS6894 AS174 AS4	1	<1%	1
45	AS31742 AS174 AS4	1	<1%	1
46	AS39122 AS174 AS4	1	<1%	1
47	AS3170 AS174 AS4	1	<1%	1
48	AS7018 AS174 AS4	1	<1%	1
49	AS132825 AS174 AS4	1	<1%	1
50	AS22652 AS174 AS4	1	<1%	1

50 of 246 paths shown. All of them are in the JSON.

More prefixes from AS4

Routes seen by RIPE RIS in the 24 hours up to 9 Nov 2026, 15:08 UTC, fetched just now.