221.3.136.0/24 - CHINA UNICOM China169 Backbone (AS4837)
CIDR
221.3.136.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇨🇳 China
City
Beijing
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
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| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.3.136.0/24 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.3.128.0/17 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 221.3.136.0/28 | 🇨🇳CN | assigned | |
| 221.3.136.16/28 | 🇨🇳CN | assigned | |
| 221.3.136.32/28 | 🇨🇳CN | assigned | |
| 221.3.136.48/28 | 🇨🇳CN | assigned | |
| 221.3.136.64/28 | 🇨🇳CN | assigned | |
| 221.3.136.80/28 | 🇨🇳CN | assigned | |
| 221.3.136.96/28 | 🇨🇳CN | assigned | |
| 221.3.136.112/28 | 🇨🇳CN | assigned | |
| 221.3.136.128/28 | 🇨🇳CN | assigned | |
| 221.3.136.144/28 | 🇨🇳CN | assigned | |
| 221.3.136.160/28 | 🇨🇳CN | assigned | |
| 221.3.136.176/28 | 🇨🇳CN | assigned | |
| 221.3.136.192/28 | 🇨🇳CN | assigned | |
| 221.3.136.208/28 | 🇨🇳CN | assigned | |
| 221.3.136.224/28 | 🇨🇳CN | assigned | |
| 221.3.136.240/28 | 🇨🇳CN | assigned |
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/221.3.136.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/221.3.136.0/24" | jq
External Links