221.239.18.0/24 - ASN For TIANJIN Provincial Net Of CT (AS17638)
CIDR
221.239.18.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇨🇳 China
City
Youyilu
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
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| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.239.18.0/24 | AS17638 CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT | Valid | Other IRR | 2026-10-12 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 221.239.0.0/18 | AS17638 CHINATELECOM-TJ-AS-AP - ASN for TIANJIN Provincial Net of CT | Valid | - | 2026-10-12 |
RPKI ROAs
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS17638 | Other IRR | MAINT-CT-GNOC | 2023-11-13 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 221.239.18.36/30 | 🇨🇳CN | assigned | |
| 221.239.18.44/30 | 🇨🇳CN | assigned | |
| 221.239.18.52/30 | 🇨🇳CN | assigned | |
| 221.239.18.64/30 | 🇨🇳CN | assigned | |
| 221.239.18.108/30 | 🇨🇳CN | assigned | |
| 221.239.18.132/30 | 🇨🇳CN | assigned | |
| 221.239.18.140/30 | 🇨🇳CN | assigned | |
| 221.239.18.160/29 | 🇨🇳CN | assigned | |
| 221.239.18.176/29 | 🇨🇳CN | assigned | |
| 221.239.18.184/29 | 🇨🇳CN | assigned | |
| 221.239.18.200/29 | 🇨🇳CN | assigned | |
| 221.239.18.208/29 | 🇨🇳CN | assigned | |
| 221.239.18.216/29 | 🇨🇳CN | assigned | |
| 221.239.18.236/30 | 🇨🇳CN | assigned |
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/221.239.18.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/221.239.18.0/24" | jq
External Links