101.4.0.0/20
🇨🇳IPv4APNICannouncedMOASNo ROA
CIDR
101.4.0.0/20
IP Version
IPv4
Addresses
4K
Mask
/20 (255.255.240.0)
Country
🇨🇳 China
City
Fengtai (Fengtai Qu)
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
2 of 2 routesMOAS - 2 origin ASNs
RPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 101.4.0.0/20 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | RADB | 5/31/2026 |
| 101.4.0.0/20 | AS24350CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications | No ROA | — | 5/31/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 101.4.0.0/14 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | — | 5/31/2026 |
| 101.4.2.0/24 | AS4538ERX-CERNET-BKB - China Education and Research Network Center | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4538 | RADB | MAINT-AS58453 | 11/13/2023 |
Origin ASNs (2)
AS4538MOAS
ERX-CERNET-BKB - China Education and Research Network Center
AS24350MOAS
CNGI-BJ-IX4-AS-AP - CERNET2 IX at Beijing University of Posts and Telecommunications
Geolocation
API
Open https://api.ipctl.io/v1/prefix/101.4.0.0/20Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/101.4.0.0/20" | jq
External Links