221.3.128.0/17 - CHINA UNICOM China169 Backbone (AS4837)
CIDR
221.3.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇨🇳 China
City
Kunming
RIR
APNIC
Status
allocated
Allocated
2003-01-08
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.3.128.0/17 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | APNICOther IRR | 2026-10-13 |
More-Specific Announcements
5 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.3.136.0/24 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
| 221.3.140.0/22 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
| 221.3.192.0/22 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
| 221.3.224.0/22 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
| 221.3.240.0/22 | AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone | Valid | - | 2026-10-13 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 221.3.128.0/17 | AS4837 | /17 | apnic |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 221.3.140.0/27 | 🇨🇳CN | assigned | |
| 221.3.140.64/27 | 🇨🇳CN | assigned | |
| 221.3.140.128/27 | 🇨🇳CN | assigned | |
| 221.3.140.160/27 | 🇨🇳CN | assigned | |
| 221.3.141.32/27 | 🇨🇳CN | assigned | |
| 221.3.141.64/27 | 🇨🇳CN | assigned | |
| 221.3.141.96/27 | 🇨🇳CN | assigned | |
| 221.3.142.64/27 | 🇨🇳CN | assigned | |
| 221.3.142.96/27 | 🇨🇳CN | assigned | |
| 221.3.142.160/27 | 🇨🇳CN | assigned | |
| 221.3.142.192/27 | 🇨🇳CN | assigned | |
| 221.3.143.64/27 | 🇨🇳CN | assigned | |
| 221.3.143.128/27 | 🇨🇳CN | assigned | |
| 221.3.143.160/27 | 🇨🇳CN | assigned | |
| 221.3.148.0/24 | 🇨🇳CN | assigned | |
| 221.3.149.32/27 | 🇨🇳CN | assigned | |
| 221.3.149.128/27 | 🇨🇳CN | assigned | |
| 221.3.150.0/26 | 🇨🇳CN | assigned | |
| 221.3.150.64/26 | 🇨🇳CN | assigned | |
| 221.3.150.128/27 | 🇨🇳CN | assigned | |
| 221.3.150.160/27 | 🇨🇳CN | assigned | |
| 221.3.151.0/26 | 🇨🇳CN | assigned | |
| 221.3.151.64/26 | 🇨🇳CN | assigned | |
| 221.3.151.192/27 | 🇨🇳CN | assigned | |
| 221.3.153.0/24 | 🇨🇳CN | assigned | |
| 221.3.154.0/26 | 🇨🇳CN | assigned | |
| 221.3.154.160/27 | 🇨🇳CN | assigned | |
| 221.3.154.192/27 | 🇨🇳CN | assigned | |
| 221.3.167.32/27 | 🇨🇳CN | assigned | |
| 221.3.167.96/27 | 🇨🇳CN | assigned | |
| 221.3.167.160/27 | 🇨🇳CN | assigned | |
| 221.3.167.192/27 | 🇨🇳CN | assigned | |
| 221.3.168.64/27 | 🇨🇳CN | assigned | |
| 221.3.176.32/27 | 🇨🇳CN | assigned | |
| 221.3.176.64/27 | 🇨🇳CN | assigned | |
| 221.3.176.160/27 | 🇨🇳CN | assigned | |
| 221.3.180.0/24 | 🇨🇳CN | assigned | |
| 221.3.192.32/27 | 🇨🇳CN | assigned | |
| 221.3.192.64/27 | 🇨🇳CN | assigned | |
| 221.3.192.128/25 | 🇨🇳CN | assigned | |
| 221.3.208.32/27 | 🇨🇳CN | assigned | |
| 221.3.208.64/27 | 🇨🇳CN | assigned | |
| 221.3.208.96/27 | 🇨🇳CN | assigned | |
| 221.3.208.160/27 | 🇨🇳CN | assigned | |
| 221.3.208.192/27 | 🇨🇳CN | assigned | |
| 221.3.210.64/27 | 🇨🇳CN | assigned | |
| 221.3.210.96/27 | 🇨🇳CN | assigned | |
| 221.3.210.192/27 | 🇨🇳CN | assigned | |
| 221.3.211.32/27 | 🇨🇳CN | assigned | |
| 221.3.211.64/26 | 🇨🇳CN | assigned | |
| 221.3.211.128/27 | 🇨🇳CN | assigned | |
| 221.3.212.0/26 | 🇨🇳CN | assigned | |
| 221.3.212.64/26 | 🇨🇳CN | assigned | |
| 221.3.212.128/27 | 🇨🇳CN | assigned | |
| 221.3.213.0/24 | 🇨🇳CN | assigned | |
| 221.3.224.96/27 | 🇨🇳CN | assigned | |
| 221.3.225.32/27 | 🇨🇳CN | assigned | |
| 221.3.225.64/27 | 🇨🇳CN | assigned | |
| 221.3.225.96/27 | 🇨🇳CN | assigned | |
| 221.3.225.160/27 | 🇨🇳CN | assigned | |
| 221.3.230.32/27 | 🇨🇳CN | assigned | |
| 221.3.230.64/27 | 🇨🇳CN | assigned | |
| 221.3.230.96/27 | 🇨🇳CN | assigned | |
| 221.3.230.192/27 | 🇨🇳CN | assigned | |
| 221.3.231.64/27 | 🇨🇳CN | assigned | |
| 221.3.232.32/27 | 🇨🇳CN | assigned | |
| 221.3.232.64/27 | 🇨🇳CN | assigned | |
| 221.3.233.32/27 | 🇨🇳CN | assigned | |
| 221.3.233.160/27 | 🇨🇳CN | assigned | |
| 221.3.233.192/27 | 🇨🇳CN | assigned | |
| 221.3.234.32/27 | 🇨🇳CN | assigned | |
| 221.3.234.64/27 | 🇨🇳CN | assigned | |
| 221.3.234.96/27 | 🇨🇳CN | assigned | |
| 221.3.234.160/27 | 🇨🇳CN | assigned | |
| 221.3.235.0/25 | 🇨🇳CN | assigned | |
| 221.3.235.160/27 | 🇨🇳CN | assigned | |
| 221.3.236.96/27 | 🇨🇳CN | assigned | |
| 221.3.236.160/27 | 🇨🇳CN | assigned | |
| 221.3.236.192/27 | 🇨🇳CN | assigned | |
| 221.3.237.32/27 | 🇨🇳CN | assigned | |
| 221.3.237.96/27 | 🇨🇳CN | assigned | |
| 221.3.238.32/27 | 🇨🇳CN | assigned | |
| 221.3.239.32/27 | 🇨🇳CN | assigned | |
| 221.3.239.96/27 | 🇨🇳CN | assigned | |
| 221.3.239.192/27 | 🇨🇳CN | assigned | |
| 221.3.241.0/27 | 🇨🇳CN | assigned | |
| 221.3.243.64/27 | 🇨🇳CN | assigned | |
| 221.3.243.96/27 | 🇨🇳CN | assigned | |
| 221.3.243.192/27 | 🇨🇳CN | assigned | |
| 221.3.244.64/27 | 🇨🇳CN | assigned | |
| 221.3.244.96/27 | 🇨🇳CN | assigned | |
| 221.3.244.160/27 | 🇨🇳CN | assigned | |
| 221.3.245.96/27 | 🇨🇳CN | assigned | |
| 221.3.245.192/27 | 🇨🇳CN | assigned | |
| 221.3.246.32/27 | 🇨🇳CN | assigned | |
| 221.3.246.96/27 | 🇨🇳CN | assigned | |
| 221.3.247.0/24 | 🇨🇳CN | assigned | |
| 221.3.248.0/21 | 🇨🇳CN | assigned | |
| 221.3.248.0/24 | 🇨🇳CN | assigned | |
| 221.3.255.0/26 | 🇨🇳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/221.3.128.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/221.3.128.0/17" | jq
External Links