210.51.187.0/24

AS4808 · China Unicom Beijing Province Network

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Summary

Country	China
Domain	china-netcom.com
ASN	AS4808
Parent Range	210.51.0.0/16
Registry	APNIC
ID	CNC-BJ-IDC

WHOIS Details

inetnum:        210.51.176.0 - 210.51.191.255
netname:        CNC-BJ-IDC
country:        CN
descr:          Beijing YiZhuang IDC of China Netcom
admin-c:        CH140-AP
tech-c:         TJ35-AP
status:         ALLOCATED NON-PORTABLE
changed:        cncipaddr@china-netcom.com 20040227
mnt-by:         MAINT-CN-ZM28
mnt-lower:      MAINT-CN-BJIDC
source:         APNIC

role:           CNCIDC hostmaster
address:        No.1,Beihuan Donglu,BDA,Beijing,China
country:        CN
phone:          +8610 6787 5599
fax-no:         +8610 6787 8624
e-mail:         cncipaddr@china-netcom.com
remarks:        send spam and abuse reports to tech-group@china-netcom.com
remarks:        Please include detailed information and times in UTC
admin-c:        TJ35-AP
tech-c:         TC254-AP
nic-hdl:        Ch140-AP
notify:         cncipaddr@china-netcom.com
mnt-by:         MAINT-CN-ZM28
changed:        hm-changed@apnic.net 20040226
source:         APNIC
changed:        hm-changed@apnic.net 20111114

person:         Tao Jiang
nic-hdl:        TJ35-AP
e-mail:         bjidc-ipaddr@cnc.cn
address:        No.1,Beihuan Donglu, Beijing Economic
address:        -TechnologicalDevelopment Area,Beijing
phone:          +8610-67878534
fax-no:         +8610-67878538
country:        CN
changed:        jiangtao@cnc.cn 20080221
mnt-by:         MAINT-CN-BJIDC
source:         APNIC

route:          210.51.160.0/19
descr:          China Unicom Beijing Province Network
country:        CN
origin:         AS4808
mnt-by:         MAINT-CNCGROUP-RR
changed:        abuse@cnc-noc.net 20160516
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 210.51.187.0/24

Range	ASN	Company	Num of IPs
210.51.0.0/16	AS9929	China Unicom IP network	65,536

Hosted domains

There are 101 domain names hosted across 21 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

1 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
210.51.187.1	AS4808 China Unicom Beijing Province Network	`4.45ms` from Beijing, CN

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
81.206.80.200	AS1136 KPN B.V.	`3.16ms` from Amsterdam, NL
128.63.246.200	AS13 Headquarters, USAISC	`2.55ms` from Ashburn, US
68.81.142.136	AS7922 Comcast Cable Communications, LLC	`4.68ms` from Ashburn, US
172.190.49.56	AS8075 Microsoft Corporation	`0.60ms` from Ashburn, US
172.212.81.72	AS8075 Microsoft Corporation	`0.87ms` from Ashburn, US
176.159.216.56	AS5410 Bouygues Telecom SA	`14.27ms` from Aubervilliers, FR
166.117.39.40	AS16509 Amazon.com, Inc.	`0.04ms` from Bangkok, TH
145.236.10.216	AS5483 Magyar Telekom Plc.	`9.42ms` from Budapest, HU
18.220.186.168	AS16509 Amazon.com, Inc.	`0.16ms` from Columbus, US
52.117.205.168	AS36351 IBM Cloud	`1.12ms` from Dallas, US
37.82.252.136	AS3320 Deutsche Telekom AG	`17.67ms` from Frankfurt am Main, DE
47.52.189.184	AS45102 Alibaba (US) Technology Co., Ltd.	`0.58ms` from Hong Kong, HK
24.213.247.8	AS53657 RoadRunner	`9.68ms` from New York City, US
207.23.252.40	AS393249 University of British Columbia	`4.58ms` from Seattle, US
163.213.157.24	AS4766 Korea Telecom	`5.98ms` from Seoul, KR
3.106.145.8	AS16509 Amazon.com, Inc.	`0.14ms` from Sydney, AU
153.218.57.104	AS4713 NTT Communications Corporation	`3.32ms` from Tokyo, JP
180.148.146.8	AS59127 Newmedia Corporation	`11.52ms` from Tokyo, JP
111.50.108.168	AS9808 China Mobile Communications Group Co., Ltd.	`10.76ms` from Xi'an, CN
59.110.198.200	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.33ms` from Beijing, CN
67.192.35.248	AS33070 Rackspace Hosting	`0.90ms` from Dallas, US
96.46.110.40	AS13765 Nedelco Inc.	`14.32ms` from Denver, US
37.228.142.40	AS209400 KurpfalzTEL GmbH	`2.33ms` from Frankfurt am Main, DE
84.69.185.104	AS5378 Vodafone Limited	`9.77ms` from Manchester, GB
73.139.192.168	AS7922 Comcast Cable Communications, LLC	`4.57ms` from Miami, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f5 210.51.187.1

traceroute to 210.51.187.1 (210.51.187.1): 64 hops max, 52 byte packets

5 [AS4808] 61.49.142.153 3.374 ms

6 *

7 [AS4808] 210.51.187.1 4.461 ms

Measurement taken from

IPinfo ProbeNet in Beijing, CN

On October 3rd 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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