HomePrefix Lookup123.51.128.0/17

123.51.128.0/17

🇹🇼
IPv4APNICallocatedAS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. RPKI Valid
CIDR
123.51.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇹🇼 Taiwan
City
Taoyuan
RIR
APNIC
Status
allocated
Allocated
11/20/2008

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
123.51.128.0/17AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid
RADB
6/13/2026

Covering Prefix

116 less-specific announcements
PrefixOrigin ASRPKIIRRLast Seen
123.51.128.0/18AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.192.0/18AS9919NCIC-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
123.51.224.0/19AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.192.0/19AS9919NCIC-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
123.51.168.0/22AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.216.0/22AS9919NCIC-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
123.51.220.0/22AS9919NCIC-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
123.51.164.0/22AS9919NCIC-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
123.51.200.0/23AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.229.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.130.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.230.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.143.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.231.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.131.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.232.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.233.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.234.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.222.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.173.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.159.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.238.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.151.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.149.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.253.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.244.0/24AS4780SEEDNET - 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
123.51.246.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.163.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.150.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.169.0/24AS4780SEEDNET - Digital United Inc. 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
123.51.156.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.155.0/24AS4780SEEDNET - Digital United Inc. Valid—6/13/2026
123.51.211.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.213.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.215.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.217.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.218.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.221.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.223.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.224.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.225.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.226.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.227.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.228.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.229.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.230.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.231.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.235.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.236.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.237.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.238.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.239.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.241.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.244.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.245.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.247.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.248.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.249.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.250.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.251.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.254.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.255.0/24AS9919NCIC-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
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
123.51.193.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.194.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.195.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.196.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.197.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.198.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.199.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.200.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.202.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.206.0/24AS9919NCIC-TW - New Century InfoComm Tech Co., Ltd. Valid—6/13/2026
123.51.208.0/24AS9919NCIC-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-AS991911/13/2023
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/123.51.128.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/123.51.128.0/17" | jq
External Links
RIPEstat Hurricane Electric BGP