AS4538
🇨🇳ERX-CERNET-BKB - China Education and Research Network CenterA91E5D61
China Education and Research Network Center
APNICallocated
Announced Prefixes (BGP)
10,332total
5,279 IPv45,053 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)10.4M
Announced (BGP)41.6M
IPv6 Addresses ⓘ
Allocated (RIR)0
Announced (BGP)6.5×10^32
Prefix Limit (IPv4)
20,000
Prefix Limit (IPv6)
20,000
Country
🇨🇳 CN
RIR
APNIC
Status
allocated
Allocated
8/1/2002
Announced Prefixes
(BGP)1,000 of 10,331|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| No ROA | APNICRADB | 5/26/2026 | |
| No ROA | — | 5/26/2026 | |
1.51.16.0/20MOAS | No ROA | RADB | 5/26/2026 |
1.51.32.0/20MOAS | No ROA | — | 5/26/2026 |
1.51.48.0/21MOAS | No ROA | — | 5/26/2026 |
1.51.112.0/24MOAS | No ROA | — | 5/26/2026 |
1.51.120.0/21MOAS | No ROA | RADB | 5/26/2026 |
1.51.144.0/20MOAS | No ROA | RADB | 5/26/2026 |
1.51.144.0/21MOAS | No ROA | — | 5/26/2026 |
1.51.152.0/21MOAS | No ROA | — | 5/26/2026 |
1–10 of 1,000
1 / 100
Allocated Prefixes
(RIR)109Prefix | Country | RIR | Status |
|---|---|---|---|
| 1.51.0.0/16 | 🇨🇳 CN | APNIC | allocated |
| 1.184.0.0/15 | 🇨🇳 CN | APNIC | allocated |
| 42.245.232.0/22 | 🇨🇳 CN | APNIC | assigned |
| 42.245.247.0/24 | 🇨🇳 CN | APNIC | assigned |
| 42.245.253.0/24 | 🇨🇳 CN | APNIC | assigned |
| 42.245.254.0/24 | 🇨🇳 CN | APNIC | assigned |
| 42.247.1.0/24 | 🇨🇳 CN | APNIC | assigned |
| 42.247.18.0/24 | 🇨🇳 CN | APNIC | assigned |
| 42.247.30.0/24 | 🇨🇳 CN | APNIC | assigned |
| 49.52.0.0/14 | 🇨🇳 CN | APNIC | allocated |
1–10 of 109
1 / 11
ASPA
No ASPA
Abuse Contact
+86-10-62784301
External Links
API
Open https://api.ipctl.io/v1/asn/4538Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/4538" | jq