172.81.120.0/21 - Zenlayer (AS21859)
CIDR
172.81.120.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇭🇰 Hong Kong
City
Hong Kong
RIR
ARIN
Status
allocated
Allocated
2015-05-14
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
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| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 172.81.120.0/21 | AS21859 ZEN-ECN - Zenlayer Inc | Valid | Other IRR | 2026-10-12 |
More-Specific Announcements
2 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 172.81.127.0/24 | AS21859 ZEN-ECN - Zenlayer Inc | Valid | - | 2026-10-12 |
| 172.81.127.0/24 | AS62610 ZEN-DPS - Zenlayer Inc | Valid | - | 2026-10-12 |
Origin ASN
AS21859
ZEN-ECN - Zenlayer Inc
Related Prefixes
More prefixes of AS21859
All prefixes of AS21859 →Geolocation
Country🇭🇰Hong KongHK
CityHong Kong
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 ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/172.81.120.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/172.81.120.0/21" | jq
External Links