221.194.0.0/16 - CHINA UNICOM China169 Backbone (AS4837)
CIDR
221.194.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇨🇳 China
City
Shijiazhuang
RIR
APNIC
Status
allocated
Allocated
2003-06-11
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.194.0.0/16 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | APNICOther IRR | 2026-10-12 |
More-Specific Announcements
3 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.194.1.0/24 | AS9929 CUII - CHINA UNICOM Industrial Internet Backbone | Valid | - | 2026-10-12 |
| 221.194.54.0/24 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-12 |
| 221.194.57.0/24 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-12 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 221.194.0.0/16 | AS4837 | /16 | apnic |
More Specific Prefixes
Related Prefixes
More prefixes of AS4837
All prefixes of AS4837 →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/221.194.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/221.194.0.0/16" | jq
External Links