123.51.160.0/19 CIDR Lookup — 8.2K IPs

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

76/100

Moderate

How this score is built

Baseline (neutral) 65
Long-established allocation (18y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 123.51.160.0/19

CIDR	IPs	Organization	ASN	Country
123.51.176.0/20	4.1K	—	—	TW
123.51.176.0/20	4.1K	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.176.0/20	4.1K	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.160.0/21	2.0K	—	—	TW
123.51.172.0/22	1.0K	—	—	TW
123.51.160.0/23	512	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.170.0/23	512	Digital United Inc.	AS4780	TW
123.51.170.0/23	512	Digital United Inc.	AS4780	TW
123.51.170.0/23	512	—	—	TW
123.51.168.0/23	512	—	—	TW
123.51.164.0/23	512	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.160.0/23	512	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.164.0/23	512	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.173.0/24	256	Digital United Inc.	AS4780	TW
123.51.173.0/24	256	Digital United Inc.	AS4780	TW
123.51.174.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.166.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.174.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.175.0/24	256	Digital United Inc.	AS4780	TW
123.51.175.0/24	256	Digital United Inc.	AS4780	TW
123.51.162.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.162.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.172.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.172.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.167.0/24	256	Digital United Inc.	AS4780	TW
123.51.167.0/24	256	Digital United Inc.	AS4780	TW
123.51.168.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.168.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.166.0/24	256	New Century InfoComm Tech Co., Ltd.	AS9919	TW
123.51.169.0/24	256	Digital United Inc.	AS4780	TW
123.51.163.0/24	256	Digital United Inc.	AS4780	TW
123.51.163.0/24	256	Digital United Inc.	AS4780	TW

First and last addresses in 123.51.160.0/19

123.51.160.0/19 runs from 123.51.160.0 to 123.51.191.255.

First 16

123.51.160.0 123.51.160.1 123.51.160.2 123.51.160.3 123.51.160.4 123.51.160.5 123.51.160.6 123.51.160.7 123.51.160.8 123.51.160.9 123.51.160.10 123.51.160.11 123.51.160.12 123.51.160.13 123.51.160.14 123.51.160.15

Last 16

123.51.191.240 123.51.191.241 123.51.191.242 123.51.191.243 123.51.191.244 123.51.191.245 123.51.191.246 123.51.191.247 123.51.191.248 123.51.191.249 123.51.191.250 123.51.191.251 123.51.191.252 123.51.191.253 123.51.191.254 123.51.191.255

BGP Routing

Live BGP anomalies →

This block is announced in BGP, observed across our RIPE RIS collectors.

Announced prefix

123.51.160.0/19

Origin AS

AS9919

Announcement samples

12,434

Last seen

2026-11-13 09:32:18

Frequently Asked Questions

What is 123.51.160.0/19?

123.51.160.0/19 is a CIDR network block containing 8,192 IPv4 addresses (from 123.51.160.0 to 123.51.191.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 123.51.160.0/19 network?

The 123.51.160.0/19 range is allocated to an unknown organization from Taiwan.