HomePrefix Lookup121.54.168.0/21

121.54.168.0/21

🇭🇰
CIDR
121.54.168.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇭🇰 Hong Kong
RIR
APNIC
Status
allocated
Allocated
10/11/2007

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
121.54.168.0/21AS152194CTGSERVERLIMITED-AS-AP - CTG Server Limited Valid
APNICRADB
6/13/2026

RPKI ROAs

2
PrefixOriginMax LengthTrust Anchor
121.54.168.0/21AS13335/24apnic
121.54.168.0/21AS152194/21apnic

IRR Route Objects

3
OriginRegistryMaintainerModified
AS13335APNICMAINT-HK-SUN3/11/2026
AS152194APNICMAINT-HK-SUN12/14/2025
AS152194RADBMAINT-AS381973/30/2024

More Specific Prefixes

8
PrefixASCountryStatus
121.54.170.0/24🇭🇰HKassigned
121.54.173.0/24AS152194🇭🇰HKassigned
121.54.175.0/24AS152194🇭🇰HKassigned
121.54.168.0/24AS152194🇭🇰HKassigned
121.54.171.0/24AS152194🇭🇰HKassigned
121.54.172.0/24🇭🇰HKassigned
121.54.169.0/24🇭🇰HKassigned
121.54.174.0/24AS152194🇭🇰HKassigned
Geolocation
Country🇭🇰Hong KongHK
GEThttps://api.ipctl.io/v1/prefix/121.54.168.0/21

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/121.54.168.0/21" | jq