121.250.0.0/20
🇨🇳IPv4APNICannouncedMOASNo ROA
CIDR
121.250.0.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇨🇳 China
City
Nanjing
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
2 of 2 routesMOAS - 2 origin ASNs
RPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.250.0.0/20 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | RADB | 5/31/2026 |
| 121.250.0.0/20 | AS141005SDEPN-AS-CN - Shandong Provincial Department of Education, | No ROA | — | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.248.0.0/14 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | — | 5/31/2026 |
| 121.250.0.0/15 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4538 | RADB | MAINT-AS4637 | 11/13/2023 |
Origin ASNs (2)
AS4538MOAS
ERX-CERNET-BKB - China Education and Research Network Center
AS141005MOAS
SDEPN-AS-CN - Shandong Provincial Department of Education,
Geolocation
API
Open https://api.ipctl.io/v1/prefix/121.250.0.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/121.250.0.0/20" | jq
External Links