BGP map for 63.245.72.0/21

63.245.72.0/21 is announced by AS23520 Columbus Networks USA, Inc. and seen by 325 peers of 23 RIPE RIS collectors, over 258 different AS paths. Its busiest upstreams are AS1299 TWELVE99 (29%), AS174 Cogent Communications, LLC (26%) and AS6830 LibertyGlobal (21%). The most common path, used by 7 peers, is AS8218 AS6830 AS23520.

Routes checked 11:54:56 UTC

No change in the origin, the upstreams or the number of peers since 15:20 UTC on 28 Oct, when this site first looked at 63.245.72.0/21.

AS-path graph toward 63.245.72.0/21

origin Tier 1Tier 2edge network prefix best path: chosen by 7 of 325 peers (2%) number on a line = peers using that link RIS data up to 11:54 UTC what the colours mean 12 of 258 paths drawn 6 quieter networks left out

View JSON Raw upstream

325collector peers

23RIS collectors

258distinct AS paths

3.4average AS hops, 2 to 6

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS1299 TWELVE99 Arelion Sweden AB	94	29%
AS174 Cogent Communications, LLC	85	26%
AS6830 LibertyGlobal Liberty Global Europe Holding B.V.	68	21%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	50	15%
AS3257 GTT-BACKBONE GTT Communications Inc.	27	8%
AS286 KPN GTT Communications Inc.	1	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS1299 TWELVE99 Arelion Sweden AB	92	28%
AS174 Cogent Communications, LLC	85	26%
AS6830 LibertyGlobal Liberty Global Europe Holding B.V.	66	20%
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.	48	15%
AS3257 GTT-BACKBONE GTT Communications Inc.	26	8%
AS2914 NTT America, Inc.	19	6%
AS3356 Level 3 Parent, LLC	7	2%
AS6939 Hurricane Electric LLC	6	2%
AS34549 MEER-AS meerfarbig GmbH & Co. KG	4	1%
AS1764 NEXTLAYER-AS Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH	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	AS8218 AS6830 AS23520	7	2%	6
2	AS13030 AS1299 AS23520	4	1%	4
3	AS199524 AS1299 AS23520	4	1%	4
4	AS47147 AS6830 AS23520	4	1%	4
5	AS24482 AS2914 AS6830 AS23520	4	1%	4
6	AS24482 AS2914 AS6762 AS23520	4	1%	4
7	AS48185 AS1299 AS23520	3	<1%	3
8	AS14840 AS6762 AS23520	3	<1%	2
9	AS51185 AS6762 AS23520	3	<1%	3
10	AS9002 AS3257 AS23520	3	<1%	3
11	AS34019 AS6830 AS23520	3	<1%	3
12	AS25091 AS6830 AS23520	3	<1%	3
13	AS48362 AS1299 AS23520	3	<1%	3
14	AS6830 AS23520	2	<1%	2
15	AS1299 AS23520	2	<1%	2
16	AS6762 AS23520	2	<1%	2
17	AS3320 AS6830 AS23520	2	<1%	2
18	AS2914 AS6830 AS23520	2	<1%	2
19	AS62167 AS174 AS23520	2	<1%	2
20	AS25160 AS174 AS23520	2	<1%	2
21	AS42473 AS1299 AS23520	2	<1%	2
22	AS34927 AS1299 AS23520	2	<1%	2
23	AS34927 AS6830 AS23520	2	<1%	2
24	AS14907 AS1299 AS23520	2	<1%	2
25	AS31027 AS1299 AS23520	2	<1%	1
26	AS3491 AS174 AS23520	2	<1%	2
27	AS15547 AS174 AS23520	2	<1%	2
28	AS12779 AS3257 AS23520	2	<1%	2
29	AS6461 AS174 AS23520	2	<1%	2
30	AS49544 AS6830 AS23520	2	<1%	2
31	AS199524 AS174 AS23520	2	<1%	2
32	AS59890 AS174 AS23520	2	<1%	2
33	AS35280 AS1299 AS23520	2	<1%	2
34	AS199524 AS6762 AS23520	2	<1%	2
35	AS19151 AS174 AS23520	2	<1%	2
36	AS917 AS60068 AS174 AS23520	2	<1%	2
37	AS58057 AS34549 AS1299 AS23520	2	<1%	2
38	AS49544 AS3356 AS1299 AS23520	2	<1%	1
39	AS35710 AS3320 AS3257 AS23520	2	<1%	2
40	AS49544 AS2914 AS6762 AS23520	2	<1%	2
41	AS51184 AS1764 AS174 AS23520	2	<1%	2
42	AS47692 AS2914 AS6830 AS23520	2	<1%	2
43	AS20612 AS9044 AS174 AS23520	2	<1%	1
44	AS24482 AS2914 AS1299 AS23520	2	<1%	2
45	AS142289 AS9583 AS4755 AS6453 AS174 AS23520	2	<1%	1
46	AS3257 AS23520	1	<1%	1
47	AS15692 AS174 AS23520	1	<1%	1
48	AS6894 AS174 AS23520	1	<1%	1
49	AS31742 AS1299 AS23520	1	<1%	1
50	AS35266 AS3257 AS23520	1	<1%	1

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

More prefixes from AS23520

Routes seen by RIPE RIS in the 24 hours up to 7 Nov 2026, 11:54 UTC, fetched 21 hours ago.