HomePrefix Lookup123.51.128.0/18

123.51.128.0/18

🇹🇼
IPv4APNICannouncedAS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. RPKI Valid
CIDR
123.51.128.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇹🇼 Taiwan
City
Taoyuan
RIR
APNIC
Status
announced
Allocated
-

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
123.51.128.0/18AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid
RADB
6/13/2026

Covering Prefix

58 less-specific announcements
PrefixOrigin ASRPKIIRRLast Seen
123.51.128.0/17AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.128.0/19AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.160.0/19AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.168.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.160.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.132.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.172.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.164.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.128.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.129.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.154.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.181.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.155.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.156.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.130.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.143.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.150.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.159.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.146.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.133.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.163.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.149.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.131.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.169.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.151.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.173.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.178.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.182.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.183.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.184.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.188.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.190.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.128.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.135.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.136.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.140.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.141.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.142.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.144.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.145.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.147.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.148.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.149.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.152.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.153.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.156.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.157.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.158.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.160.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.161.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.162.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.164.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.165.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.166.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.168.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.172.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.174.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.176.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026

RPKI ROAs

2
PrefixOriginMax LengthTrust Anchor
123.51.128.0/17AS4780/24apnic
123.51.128.0/17AS9919/24apnic

IRR Route Objects

2
OriginRegistryMaintainerModified
AS4780RADBMAINT-AS47806/8/2026
AS9919RADBMAINT-AS463711/13/2023
Origin ASN
AS9919
NCIC-TW - New Century InfoComm Tech Co., Ltd.
Geolocation
Country🇹🇼TaiwanTW
RegionTaiwan
CityTaoyuan
Coordinates24.9937, 121.2970 ↗
API
Open
GEThttps://api.ipctl.io/v1/prefix/123.51.128.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/123.51.128.0/18" | jq
External Links
RIPEstat Hurricane Electric BGP