206208 looking glass

AS4538 China Education and Research Network Center 🇨🇳 CN

Announcing 5,168 prefixes, seen at the RIS collectors.

IPv4 prefixes
5,158
42,948,864 (167,769 × /24)
IPv6 prefixes
10
265 × /48
Upstreams
14
transit providers observed
Peers
8
settlement-free adjacencies
Downstreams
15
transit customers observed
Customer cone
86
ASes reachable through it

Registry and operator data

AS number
AS4538
Name
China Education and Research Network Center
Organisation
CERNET-CN
Country
🇨🇳 CN
RIR
APNIC
Allocated
2002-08-01
Network type
Educational/Research
Scope
Not Disclosed
Peering policy
Open
Website
http://www.edu.cn
PeeringDB
net/13851

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

1,461 valid (28.3%) 2 invalid (0.0%) 3,705 no ROA (71.7%)

Announcement history

One point per day, recorded at each table import

01k3k4k5k09-1809-2309-2810-0310-0810-1310-1810-21
IPv4 IPv6

Recorded changes

New prefixes and origin changes seen on the live stream

WhenChangePrefixOriginPath
2026-10-21 08:51:58Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-21 08:05:43Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-21 04:09:23Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-21 04:08:07Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-20 20:27:46Z origin change 103.252.172.0/22 AS133465 → AS4538 37989693945384538453845384538
2026-10-20 20:26:14Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-20 20:15:24Z origin change 103.252.172.0/22 AS133465 → AS4538 37989693945384538453845384538
2026-10-20 20:13:26Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-20 20:09:13Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 20:09:13Z origin change 180.208.59.0/24 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 19:37:04Z origin change 103.252.172.0/22 AS4538 → AS133465 328840327727174645345384538133465133465
2026-10-20 19:37:03Z origin change 180.208.59.0/24 AS4538 → AS133465 3288403277271745845358453453845384538453824361133465133465
2026-10-20 18:25:25Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 18:25:25Z origin change 180.208.59.0/24 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 17:13:45Z origin change 202.179.240.0/20 AS4538 → AS24489 32884032772717464534538453845382391124489
2026-10-20 17:13:44Z origin change 180.208.59.0/24 AS4538 → AS133465 3288403277271745845358453453845384538453824361133465133465
2026-10-20 17:13:34Z origin change 223.3.0.0/16 AS4538 → AS24361 328840327727174291445384538453824361
2026-10-20 16:38:22Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-20 15:50:00Z origin change 210.30.0.0/16 AS24369 → AS4538 496732076483594538
2026-10-20 15:50:00Z origin change 202.113.0.0/16 AS24352 → AS4538 496732076483594538
2026-10-20 15:50:00Z origin change 202.179.240.0/20 AS24489 → AS4538 496732076483594538
2026-10-20 15:49:53Z origin change 183.174.0.0/16 AS24349 → AS4538 496732076483594538
2026-10-20 15:49:25Z origin change 219.223.0.0/16 AS24357 → AS4538 496732076483594538
2026-10-20 15:49:23Z origin change 115.27.0.0/16 AS24349 → AS4538 496732076483594538
2026-10-20 15:49:23Z origin change 115.154.0.0/16 AS24353 → AS4538 496732076483594538
2026-10-20 15:48:44Z origin change 223.3.0.0/16 AS24361 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 183.172.0.0/15 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 101.5.0.0/16 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 183.172.0.0/16 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 101.6.0.0/16 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 183.173.0.0/16 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 59.66.0.0/16 AS24348 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 222.205.0.0/16 AS24364 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 219.220.0.0/16 AS24364 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 59.79.0.0/16 AS24364 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 59.78.0.0/16 AS24364 → AS4538 496732076483594538
2026-10-20 15:48:29Z origin change 222.204.0.0/16 AS24364 → AS4538 496732076483594538
2026-10-20 15:48:24Z origin change 49.140.0.0/16 AS24371 → AS4538 496732076483594538
2026-10-20 14:15:22Z origin change 202.113.0.0/16 AS4538 → AS24352 46087575244902448923911453824352
2026-10-20 14:15:22Z origin change 210.30.0.0/16 AS4538 → AS24369 46087575244902448923911453824369
2026-10-20 14:14:44Z origin change 183.174.0.0/16 AS4538 → AS24349 46087575244902448923911453824349
2026-10-20 14:14:37Z origin change 115.154.0.0/16 AS4538 → AS24353 46087575244902448923911453824353
2026-10-20 14:14:37Z origin change 115.27.0.0/16 AS4538 → AS24349 46087575244902448923911453824349
2026-10-20 14:14:37Z origin change 219.223.0.0/16 AS4538 → AS24357 46087575244902448923911453824357
2026-10-20 14:13:26Z origin change 59.66.0.0/16 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:26Z origin change 101.5.0.0/16 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:26Z origin change 101.6.0.0/16 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:26Z origin change 183.172.0.0/16 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:26Z origin change 183.172.0.0/15 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:26Z origin change 183.173.0.0/16 AS4538 → AS24348 46087575244902448923911453824348
2026-10-20 14:13:25Z origin change 59.78.0.0/16 AS4538 → AS24364 46087575244902448923911453824364
2026-10-20 14:13:25Z origin change 59.79.0.0/16 AS4538 → AS24364 46087575244902448923911453824364
2026-10-20 14:13:25Z origin change 219.220.0.0/16 AS4538 → AS24364 46087575244902448923911453824364
2026-10-20 14:13:25Z origin change 222.204.0.0/16 AS4538 → AS24364 46087575244902448923911453824364
2026-10-20 14:13:25Z origin change 222.205.0.0/16 AS4538 → AS24364 46087575244902448923911453824364
2026-10-20 14:13:23Z origin change 49.140.0.0/16 AS4538 → AS24371 46087575244902448923911453824371
2026-10-20 13:02:44Z origin change 103.252.172.0/22 AS133465 → AS4538 208972693945384538453845384538
2026-10-20 11:57:14Z origin change 103.252.172.0/22 AS4538 → AS133465 33331257645345384538133465133465
2026-10-20 11:07:04Z origin change 223.3.0.0/16 AS4538 → AS24361 49673204851299291445384538453824361
2026-10-20 11:06:43Z origin change 202.179.240.0/20 AS4538 → AS24489 496732048564534538453845382391124489
2026-10-20 11:06:42Z origin change 223.3.0.0/16 AS24361 → AS4538 496732076483594538
2026-10-20 11:06:34Z origin change 202.179.240.0/20 AS24489 → AS4538 496732076483594538
2026-10-20 10:28:44Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 10:28:44Z origin change 180.208.59.0/24 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 10:02:48Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 10:02:48Z origin change 180.208.59.0/24 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 10:02:20Z origin change 103.252.172.0/22 AS4538 → AS133465 328840327727174645345384538133465133465
2026-10-20 10:02:19Z origin change 180.208.59.0/24 AS4538 → AS133465 3288403277271745845358453453845384538453824361133465133465
2026-10-20 09:52:09Z origin change 180.208.59.0/24 AS4538 → AS133465 333311032096545384538133465133465
2026-10-20 09:31:56Z origin change 103.252.172.0/22 AS4538 → AS133465 333311032096545384538133465133465
2026-10-20 09:17:02Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 08:52:52Z origin change 103.252.172.0/22 AS4538 → AS133465 380013491645345384538133465133465
2026-10-20 08:04:08Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 07:39:13Z origin change 103.252.172.0/22 AS133465 → AS4538 202365693945384538453845384538
2026-10-20 07:30:41Z origin change 103.252.172.0/22 AS4538 → AS133465 557202914645345384538133465133465
2026-10-20 07:30:15Z origin change 103.252.172.0/22 AS133465 → AS4538 1328253356693945384538453845384538
2026-10-20 07:30:03Z origin change 103.252.172.0/22 AS133465 → AS4538 17639693945384538453845384538
2026-10-20 07:30:03Z origin change 103.252.172.0/22 AS4538 → AS133465 21628582806762645345384538133465133465
2026-10-20 07:29:50Z origin change 202.179.240.0/20 AS4538 → AS24489 5782112586325764534538453845382391124489
2026-10-20 07:29:50Z origin change 103.252.172.0/22 AS4538 → AS133465 33331257645345384538133465133465
2026-10-20 07:29:49Z origin change 103.252.172.0/22 AS133465 → AS4538 202365506736453693945384538453845384538
2026-10-20 07:29:37Z origin change 202.179.240.0/20 AS24489 → AS4538 5572099304538
2026-10-20 07:29:35Z origin change 103.252.172.0/22 AS4538 → AS133465 345492914325758453453845384538453824361133465133465
2026-10-20 07:29:31Z origin change 103.252.172.0/22 AS133465 → AS4538 580571836693945384538453845384538
2026-10-20 07:29:27Z origin change 103.252.172.0/22 AS4538 → AS133465 328840327727174325758453453845384538453824361133465133465
2026-10-20 07:29:25Z origin change 103.252.172.0/22 AS133465 → AS4538 138309713356693945384538453845384538
2026-10-20 07:29:24Z origin change 103.252.172.0/22 AS4538 → AS133465 380012914645345384538133465133465
2026-10-20 07:29:23Z origin change 103.252.172.0/22 AS133465 → AS4538 35493356693945384538453845384538
2026-10-20 07:29:19Z origin change 103.252.172.0/22 AS4538 → AS133465 20236550673174645345384538133465133465
2026-10-20 07:29:14Z origin change 103.252.172.0/22 AS4538 → AS133465 132825174645345384538133465133465
2026-10-20 07:29:13Z origin change 103.252.172.0/22 AS4538 → AS133465 21628582806762645345384538133465133465
2026-10-20 07:29:13Z origin change 103.252.172.0/22 AS133465 → AS4538 205148434693945384538453845384538
2026-10-20 07:29:13Z origin change 103.252.172.0/22 AS133465 → AS4538 4967320485693945384538453845384538
2026-10-20 07:29:11Z origin change 103.252.172.0/22 AS133465 → AS4538 7018693945384538453845384538
2026-10-20 07:29:00Z origin change 103.252.172.0/22 AS133465 → AS4538 206499693945384538453845384538
2026-10-20 07:29:00Z origin change 103.252.172.0/22 AS4538 → AS133465 34549325758453453845384538453824361133465133465
2026-10-20 07:20:03Z origin change 103.252.172.0/22 AS4538 → AS133465 35493356645345384538133465133465
2026-10-20 07:19:52Z origin change 103.252.172.0/22 AS4538 → AS133465 138309713356645345384538133465133465
2026-10-20 07:19:49Z origin change 103.252.172.0/22 AS4538 → AS133465 202365506739002645345384538133465133465
2026-10-20 07:19:46Z origin change 202.179.240.0/20 AS4538 → AS24489 5782112586325764534538453845382391124489