223.121.0.0/17
🇭🇰CIDR
223.121.0.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇭🇰 Hong Kong
City
Kwai Chung
RIR
APNIC
Status
allocated
Allocated
7/1/2010
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 223.121.0.0/17 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | APNIC | 5/31/2026 |
Covering Prefix
8 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 223.64.0.0/10 | AS9808CHINAMOBILE-CN - China Mobile Communications Group Co., Ltd. | No ROA | — | 5/31/2026 |
| 223.121.0.0/22 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
| 223.121.4.0/22 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
| 223.121.32.0/23 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
| 223.121.56.0/24 | AS58411GTDCL-HK - Unit A-E, 13/F, Golden Sun Centre, | Valid | — | 5/31/2026 |
| 223.121.16.0/24 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
| 223.121.15.0/24 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
| 223.121.12.0/24 | AS58453CMI-INT-HK - China Mobile International Limited | Valid | — | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 223.121.0.0/17 | AS58453 | /24 | apnic |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS58453 | APNIC | MAINT-CMI-INT-HK | 3/1/2021 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 223.121.32.0/23 | AS58453 | 🇸🇬SG | assigned |
| 223.121.15.0/24 | AS58453 | 🇩🇪DE | assigned |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/223.121.0.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/223.121.0.0/17" | jq
External Links