Home Prefix Lookup210.51.0.0/16

210.51.0.0/16

🇨🇳

IPv4APNICallocatedAS9929CUII - CHINA UNICOM Industrial Internet BackboneNo ROA

CIDR

210.51.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇨🇳 China

City

Beizang

RIR

APNIC

Status

allocated

Allocated

10/11/2000

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
210.51.0.0/16	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	APNIC	5/31/2026

Covering Prefix

82 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
210.51.192.0/18	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.8.0/21	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.216.0/21	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.248.0/21	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.212.0/22	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	No ROA	—	5/31/2026
210.51.204.0/22	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.244.0/22	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.208.0/22	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.36.0/22	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.20.0/22	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.48.0/22	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.190.0/23	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.180.0/23	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.214.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.30.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.212.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.224.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	Valid	—	5/31/2026
210.51.230.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.232.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.238.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.202.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.198.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.194.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.242.0/23	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.62.0/23	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.54.0/23	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.34.0/23	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.56.0/23	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.189.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.2.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.18.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.160.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.161.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.163.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.175.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.176.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.179.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.183.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.185.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.186.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.187.0/24	AS4808CHINA169-BJ - China Unicom Beijing Province Network	Valid	—	5/31/2026
210.51.235.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.236.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.240.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	Valid	—	5/31/2026
210.51.241.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.22.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.21.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.45.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.192.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.193.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	Valid	—	5/31/2026
210.51.43.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.196.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.197.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.200.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.201.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.39.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.33.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.226.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	Valid	—	5/31/2026
210.51.228.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	Valid	—	5/31/2026
210.51.229.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.48.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.29.0/24	AS9929CUII - CHINA UNICOM Industrial Internet Backbone	No ROA	—	5/31/2026
210.51.42.0/24	AS17621CNCGROUP-SH - China Unicom Shanghai network	No ROA	—	5/31/2026
210.51.60.0/24	AS17621CNCGROUP-SH - China Unicom Shanghai network	No ROA	—	5/31/2026
210.51.35.0/24	AS17621CNCGROUP-SH - China Unicom Shanghai network	No ROA	—	5/31/2026
210.51.45.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.36.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.25.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.59.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.32.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.29.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.40.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.26.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.47.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.27.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.41.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.61.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.46.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.52.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.53.0/24	AS138421CU-CN-AS - China Unicom	No ROA	—	5/31/2026
210.51.43.0/24	AS140979UNICOM-SHFT-IDC - China Unicom Shanghai FuTe IDC network	No ROA	—	5/31/2026
210.51.44.0/24	AS140979UNICOM-SHFT-IDC - China Unicom Shanghai FuTe IDC network	No ROA	—	5/31/2026

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS9929	APNIC	MAINT-CNCGROUP-RR	9/4/2008

More Specific Prefixes

100

Prefix	AS	Country	Status
210.51.32.0/19		🇨🇳CN	assigned
210.51.0.0/20		🇨🇳CN	assigned
210.51.176.0/20		🇨🇳CN	assigned
210.51.160.0/20		🇨🇳CN	assigned
210.51.24.0/21		🇨🇳CN	assigned
210.51.216.0/21	AS9929	🇨🇳CN	assigned
210.51.20.0/22	AS138421	🇨🇳CN	assigned
210.51.16.0/22		🇨🇳CN	assigned
210.51.246.0/23		🇨🇳CN	assigned
210.51.232.0/23	AS9929	🇨🇳CN	assigned
210.51.252.0/23		🇨🇳CN	assigned
210.51.230.0/23	AS9929	🇨🇳CN	assigned
210.51.254.0/23		🇨🇳CN	assigned
210.51.253.0/24		🇨🇳CN	assigned
210.51.19.0/24		🇨🇳CN	assigned
210.51.229.0/24	AS9929	🇨🇳CN	assigned
210.51.234.0/24		🇨🇳CN	assigned
210.51.248.0/24		🇨🇳CN	assigned
210.51.205.0/24		🇨🇳CN	assigned
210.51.245.0/24		🇨🇳CN	assigned
210.51.207.0/24		🇨🇳CN	assigned
210.51.242.0/24		🇨🇳CN	assigned
210.51.206.0/24		🇨🇳CN	assigned
210.51.241.0/24	AS9929	🇨🇳CN	assigned
210.51.181.0/24		🇨🇳CN	assigned
210.51.204.0/24		🇨🇳CN	assigned
210.51.64.0/24		🇨🇳CN	assigned
210.51.182.0/24		🇨🇳CN	assigned
210.51.185.0/24	AS4808	🇨🇳CN	assigned
210.51.200.128/25		🇨🇳CN	assigned
210.51.254.0/25		🇨🇳CN	assigned
210.51.183.0/25		🇨🇳CN	assigned
210.51.186.0/25		🇨🇳CN	assigned
210.51.239.0/25		🇨🇳CN	assigned
210.51.199.0/25		🇨🇳CN	assigned
210.51.197.128/25		🇨🇳CN	assigned
210.51.196.128/25		🇨🇳CN	assigned
210.51.214.128/25		🇨🇳CN	assigned
210.51.251.0/25		🇨🇳CN	assigned
210.51.193.0/25		🇨🇳CN	assigned
210.51.235.0/25		🇨🇳CN	assigned
210.51.250.0/25		🇨🇳CN	assigned
210.51.243.0/25		🇨🇳CN	assigned
210.51.198.128/25		🇨🇳CN	assigned
210.51.194.128/25		🇨🇳CN	assigned
210.51.200.0/25		🇨🇳CN	assigned
210.51.193.128/25		🇨🇳CN	assigned
210.51.254.128/25		🇨🇳CN	assigned
210.51.244.0/25		🇨🇳CN	assigned
210.51.255.128/25		🇨🇳CN	assigned
210.51.189.0/25		🇨🇳CN	assigned
210.51.225.128/25		🇨🇳CN	assigned
210.51.201.0/25		🇨🇳CN	assigned
210.51.6.0/25		🇨🇳CN	assigned
210.51.178.0/25		🇨🇳CN	assigned
210.51.192.128/25		🇨🇳CN	assigned
210.51.198.0/25		🇨🇳CN	assigned
210.51.194.0/25		🇨🇳CN	assigned
210.51.249.0/25		🇨🇳CN	assigned
210.51.255.0/25		🇨🇳CN	assigned
210.51.243.128/25		🇨🇳CN	assigned
210.51.225.0/25		🇨🇳CN	assigned
210.51.251.128/26		🇨🇳CN	assigned
210.51.238.0/26		🇨🇳CN	assigned
210.51.240.128/26		🇨🇳CN	assigned
210.51.239.128/26		🇨🇳CN	assigned
210.51.237.128/26		🇨🇳CN	assigned
210.51.236.128/26		🇨🇳CN	assigned
210.51.240.0/26		🇨🇳CN	assigned
210.51.235.128/26		🇨🇳CN	assigned
210.51.228.0/26		🇨🇳CN	assigned
210.51.236.64/26		🇨🇳CN	assigned
210.51.199.192/26		🇨🇳CN	assigned
210.51.214.64/26		🇨🇳CN	assigned
210.51.183.128/26		🇨🇳CN	assigned
210.51.186.128/26		🇨🇳CN	assigned
210.51.195.0/26		🇨🇳CN	assigned
210.51.224.0/26		🇨🇳CN	assigned
210.51.192.64/26		🇨🇳CN	assigned
210.51.240.64/26		🇨🇳CN	assigned
210.51.237.0/26		🇨🇳CN	assigned
210.51.199.128/26		🇨🇳CN	assigned
210.51.7.192/27		🇨🇳CN	assigned
210.51.40.160/27		🇨🇳CN	assigned
210.51.38.64/27		🇨🇳CN	assigned
210.51.36.96/27		🇨🇳CN	assigned
210.51.224.160/27		🇨🇳CN	assigned
210.51.36.64/27		🇨🇳CN	assigned
210.51.158.224/27		🇨🇳CN	assigned
210.51.29.0/27		🇨🇳CN	assigned
210.51.29.32/27		🇨🇳CN	assigned
210.51.30.160/27		🇨🇳CN	assigned
210.51.30.224/27		🇨🇳CN	assigned
210.51.8.224/27		🇨🇳CN	assigned
210.51.28.160/27		🇨🇳CN	assigned
210.51.26.64/27		🇨🇳CN	assigned
210.51.22.224/27		🇨🇳CN	assigned
210.51.28.96/27		🇨🇳CN	assigned
210.51.158.192/27		🇨🇳CN	assigned
210.51.22.32/27		🇨🇳CN	assigned

Origin ASN

AS9929

CUII - CHINA UNICOM Industrial Internet Backbone

Geolocation

Country🇨🇳ChinaCN

RegionBeijing

CityBeizang

Coordinates39.6089, 116.2550 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/210.51.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/210.51.0.0/16" | jq

External Links

RIPEstat Hurricane Electric BGP