BGP map for 172.81.120.0/21

172.81.120.0/21 is announced by AS21859 Zenlayer Inc and seen by 329 peers of 23 RIPE RIS collectors, over 262 different AS paths. Its busiest upstreams are AS4229 Zenlayer Inc (76%), AS6939 Hurricane Electric LLC (12%) and AS24482 SG.GS (3%). The most common path, used by 11 peers, is AS24482 AS21859.

Routes checked 19:17:36 UTC

No change in the origin, the upstreams or the number of peers since 19:17 UTC, when this site first looked at 172.81.120.0/21.

AS-path graph toward 172.81.120.0/21

origin Tier 1Tier 2transitedge network prefix best path: chosen by 11 of 329 peers (3%) number on a line = peers using that link RIS data up to 19:17 UTC what the colours mean 12 of 262 paths drawn 4 quieter networks left out

Download PNG View JSON Raw upstream

329collector peers

23RIS collectors

262distinct AS paths

4.4average AS hops, 2 to 7

Upstreams

Networks directly in front of the origin.

Network	Peers	Share
AS4229 Zenlayer Inc	250	76%
AS6939 Hurricane Electric LLC	39	12%
AS24482 SG.GS	11	3%
AS8966 Etisalat-AS EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC	5	2%
AS20485 TRANSTELECOM Joint Stock Company TransTeleCom	4	1%
AS38008 Aperture Science Limited	2	<1%
AS9002 RETN-AS RETN Limited	2	<1%
AS4635 Hong Kong Internet Exchange--Route Server 1	2	<1%
AS4637 Telstra Global	2	<1%
AS8220 COLT COLT Technology Services Group Limited	2	<1%

Transit networks

Networks between the collector peer and the origin.

Network	Peers	Share
AS4229 Zenlayer Inc	250	76%
AS2914 NTT America, Inc.	136	41%
AS6453 TATA COMMUNICATIONS (AMERICA) INC	88	27%
AS6939 Hurricane Electric LLC	39	12%
AS3356 Level 3 Parent, LLC	26	8%
AS174 Cogent Communications, LLC	25	8%
AS1299 TWELVE99 Arelion Sweden AB	18	5%
AS3303 SWISSCOM Swisscom (Schweiz) AG	14	4%
AS6461 Zayo Bandwidth	11	3%
AS3320 DTAG Deutsche Telekom AG	11	3%

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 AS21859	11	3%	11
2	AS8218 AS6461 AS2914 AS4229 AS21859	5	2%	5
3	AS13030 AS1299 AS4229 AS21859	4	1%	4
4	AS12779 AS2914 AS4229 AS21859	4	1%	4
5	AS199524 AS6453 AS4229 AS21859	4	1%	4
6	AS14840 AS174 AS6453 AS4229 AS21859	4	1%	2
7	AS2914 AS4229 AS21859	3	<1%	3
8	AS3491 AS2914 AS4229 AS21859	3	<1%	3
9	AS48185 AS2914 AS4229 AS21859	3	<1%	3
10	AS49544 AS2914 AS4229 AS21859	3	<1%	3
11	AS34019 AS3303 AS6939 AS21859	3	<1%	3
12	AS6461 AS2914 AS4229 AS21859	3	<1%	3
13	AS48362 AS1764 AS2914 AS4229 AS21859	3	<1%	3
14	AS47147 AS3320 AS6453 AS4229 AS21859	3	<1%	3
15	AS1299 AS4229 AS21859	2	<1%	2
16	AS8529 AS6939 AS21859	2	<1%	2
17	AS59890 AS6939 AS21859	2	<1%	2
18	AS3257 AS6453 AS4229 AS21859	2	<1%	2
19	AS6461 AS6453 AS4229 AS21859	2	<1%	2
20	AS6830 AS2914 AS4229 AS21859	2	<1%	2
21	AS25160 AS2914 AS4229 AS21859	2	<1%	2
22	AS14907 AS2914 AS4229 AS21859	2	<1%	2
23	AS15547 AS3303 AS6939 AS21859	2	<1%	2
24	AS6762 AS2914 AS4229 AS21859	2	<1%	2
25	AS47692 AS2914 AS4229 AS21859	2	<1%	2
26	AS25091 AS6453 AS4229 AS21859	2	<1%	2
27	AS9002 AS6453 AS4229 AS21859	2	<1%	2
28	AS2497 AS2914 AS4229 AS21859	2	<1%	2
29	AS19151 AS2914 AS4229 AS21859	2	<1%	2
30	AS8218 AS6461 AS6453 AS4229 AS21859	2	<1%	2
31	AS58057 AS34549 AS2914 AS4229 AS21859	2	<1%	2
32	AS49544 AS3356 AS2914 AS4229 AS21859	2	<1%	1
33	AS142289 AS9583 AS1299 AS4229 AS21859	2	<1%	1
34	AS31027 AS3356 AS2914 AS4229 AS21859	2	<1%	1
35	AS35710 AS3320 AS6453 AS4229 AS21859	2	<1%	2
36	AS51184 AS47692 AS2914 AS4229 AS21859	2	<1%	2
37	AS51185 AS6762 AS2914 AS4229 AS21859	2	<1%	2
38	AS20612 AS8758 AS3303 AS6939 AS21859	2	<1%	1
39	AS271253 AS3356 AS2914 AS4229 AS21859	2	<1%	1
40	AS55720 AS21859	1	<1%	1
41	AS38008 AS21859	1	<1%	1
42	AS142271 AS21859	1	<1%	1
43	AS134823 AS21859	1	<1%	1
44	AS9002 AS21859	1	<1%	1
45	AS45896 AS21859	1	<1%	1
46	AS49544 AS21859	1	<1%	1
47	AS35280 AS21859	1	<1%	1
48	AS20205 AS6939 AS21859	1	<1%	1
49	AS49673 AS20485 AS21859	1	<1%	1
50	AS55720 AS6939 AS21859	1	<1%	1

50 of 262 paths shown. All of them are in the JSON.

More prefixes from AS21859

Routes seen by RIPE RIS in the 24 hours up to 15 Sep 2026, 19:17 UTC, fetched just now.