210.21.237.0/24 - China Unicom Shenzen Network (AS17623)
CIDR
210.21.237.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇨🇳 China
City
Jinrongjie (Xicheng District)
RIR
APNIC
Status
assigned
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 210.21.237.0/24 | AS17623 CNCGROUP-SZ - China Unicom Shenzen network | Valid | - | 2026-10-12 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 210.21.192.0/18 | AS17623 CNCGROUP-SZ - China Unicom Shenzen network | Valid | - | 2026-10-12 |
Related Prefixes
Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the APNIC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/210.21.237.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/210.21.237.0/24" | jq
External Links