HomePrefix Lookup123.255.64.0/21

123.255.64.0/21

🇭🇰
IPv4APNICannouncedAS3661ERX-CUHKNET - The Chinese University of Hong KongNo ROA
CIDR
123.255.64.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇭🇰 Hong Kong
RIR
APNIC
Status
announced
Allocated
-

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
123.255.64.0/21AS3661ERX-CUHKNET - The Chinese University of Hong KongNo ROA
APNICRADB
5/31/2026

IRR Route Objects

5
OriginRegistryMaintainerModified
AS3661APNICMAINT-CUHKNET-HK3/23/2015
AS3661RADBMAINT-AS926911/13/2023
AS3662RADBMAINT-AS926911/13/2023
AS9269RADBMAINT-AS926911/13/2023
AS10103RADBMAINT-AS926911/13/2023
Origin ASN
AS3661
ERX-CUHKNET - The Chinese University of Hong Kong
Geolocation
Country🇭🇰Hong KongHK
Coordinates22.3964, 114.1095 ↗
API
Open
GEThttps://api.ipctl.io/v1/prefix/123.255.64.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/123.255.64.0/21" | jq
External Links
RIPEstat Hurricane Electric BGP