Home Prefix Lookup210.21.0.0/18

210.21.0.0/18 - China Unicom Guangzhou Network (AS17622)

IPv4APNICannouncedAS17622CNCGROUP-GZ - China Unicom Guangzhou network RPKI Valid

CIDR

210.21.0.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇨🇳 China

City

Guangzhou

RIR

APNIC

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
210.21.0.0/18	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	APNICOther IRR	2026-10-12

Related Announcements

1 less-specific, 6 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
210.21.0.0/17	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.4.0/24	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.8.0/22	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.17.0/24	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.32.0/19	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.50.0/24	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12
210.21.51.0/24	AS17622 CNCGROUP-GZ - China Unicom Guangzhou network	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
210.21.0.0/18	AS17622	/18	apnic
210.21.0.0/17	AS17622	/17	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS17622	APNIC	MAINT-CNCGROUP-RR	2023-06-08
AS17622	Other IRR	MAINT-AS58453	2023-11-13

More Specific Prefixes

100

Prefix	AS	Country	Status
210.21.6.0/27		🇨🇳CN	assigned
210.21.6.48/28		🇨🇳CN	assigned
210.21.6.80/28		🇨🇳CN	assigned
210.21.6.96/28		🇨🇳CN	assigned
210.21.6.128/26		🇨🇳CN	assigned
210.21.6.192/26		🇨🇳CN	assigned
210.21.7.0/24		🇨🇳CN	assigned
210.21.8.0/24		🇨🇳CN	assigned
210.21.9.0/26		🇨🇳CN	assigned
210.21.9.64/27		🇨🇳CN	assigned
210.21.9.96/28		🇨🇳CN	assigned
210.21.9.192/26		🇨🇳CN	assigned
210.21.10.64/26		🇨🇳CN	assigned
210.21.10.128/26		🇨🇳CN	assigned
210.21.10.192/27		🇨🇳CN	assigned
210.21.10.224/27		🇨🇳CN	assigned
210.21.11.0/24		🇨🇳CN	assigned
210.21.12.0/26		🇨🇳CN	assigned
210.21.12.64/26		🇨🇳CN	assigned
210.21.12.128/25		🇨🇳CN	assigned
210.21.13.0/24		🇨🇳CN	assigned
210.21.14.0/24		🇨🇳CN	assigned
210.21.15.0/24		🇨🇳CN	assigned
210.21.16.0/24		🇨🇳CN	assigned
210.21.17.0/24	AS17622	🇨🇳CN	assigned
210.21.18.0/25		🇨🇳CN	assigned
210.21.18.128/25		🇨🇳CN	assigned
210.21.19.0/25		🇨🇳CN	assigned
210.21.19.128/25		🇨🇳CN	assigned
210.21.20.0/25		🇨🇳CN	assigned
210.21.20.128/25		🇨🇳CN	assigned
210.21.21.0/24		🇨🇳CN	assigned
210.21.22.0/24		🇨🇳CN	assigned
210.21.22.0/26		🇨🇳CN	assigned
210.21.23.0/24		🇨🇳CN	assigned
210.21.24.0/24		🇨🇳CN	assigned
210.21.24.160/28		🇨🇳CN	assigned
210.21.25.0/24		🇨🇳CN	assigned
210.21.26.0/24		🇨🇳CN	assigned
210.21.29.64/27		🇨🇳CN	assigned
210.21.29.128/26		🇨🇳CN	assigned
210.21.29.240/28		🇨🇳CN	assigned
210.21.30.0/26		🇨🇳CN	assigned
210.21.30.64/26		🇨🇳CN	assigned
210.21.30.128/26		🇨🇳CN	assigned
210.21.30.192/26		🇨🇳CN	assigned
210.21.30.192/27		🇨🇳CN	assigned
210.21.30.224/27		🇨🇳CN	assigned
210.21.31.0/25		🇨🇳CN	assigned
210.21.31.96/27		🇨🇳CN	assigned
210.21.31.192/26		🇨🇳CN	assigned
210.21.31.208/28		🇨🇳CN	assigned
210.21.31.224/27		🇨🇳CN	assigned
210.21.32.0/26		🇨🇳CN	assigned
210.21.32.16/28		🇨🇳CN	assigned
210.21.32.64/27		🇨🇳CN	assigned
210.21.32.144/28		🇨🇳CN	assigned
210.21.32.160/28		🇨🇳CN	assigned
210.21.32.176/28		🇨🇳CN	assigned
210.21.32.224/27		🇨🇳CN	assigned
210.21.33.0/26		🇨🇳CN	assigned
210.21.33.64/28		🇨🇳CN	assigned
210.21.33.80/28		🇨🇳CN	assigned
210.21.33.128/25		🇨🇳CN	assigned
210.21.34.0/26		🇨🇳CN	assigned
210.21.34.64/27		🇨🇳CN	assigned
210.21.35.0/26		🇨🇳CN	assigned
210.21.35.64/26		🇨🇳CN	assigned
210.21.35.128/27		🇨🇳CN	assigned
210.21.35.160/27		🇨🇳CN	assigned
210.21.35.192/26		🇨🇳CN	assigned
210.21.36.0/26		🇨🇳CN	assigned
210.21.36.128/25		🇨🇳CN	assigned
210.21.37.0/25		🇨🇳CN	assigned
210.21.37.128/26		🇨🇳CN	assigned
210.21.37.192/26		🇨🇳CN	assigned
210.21.38.0/25		🇨🇳CN	assigned
210.21.38.128/25		🇨🇳CN	assigned
210.21.39.0/24		🇨🇳CN	assigned
210.21.40.0/24		🇨🇳CN	assigned
210.21.41.0/24		🇨🇳CN	assigned
210.21.44.32/27		🇨🇳CN	assigned
210.21.44.64/26		🇨🇳CN	assigned
210.21.44.128/25		🇨🇳CN	assigned
210.21.45.0/24		🇨🇳CN	assigned
210.21.46.0/24		🇨🇳CN	assigned
210.21.47.64/26		🇨🇳CN	assigned
210.21.47.128/25		🇨🇳CN	assigned
210.21.49.0/24		🇨🇳CN	assigned
210.21.50.0/24	AS17622	🇨🇳CN	assigned
210.21.51.0/24	AS17622	🇨🇳CN	assigned
210.21.56.0/24		🇨🇳CN	assigned
210.21.57.0/24		🇨🇳CN	assigned
210.21.58.0/24		🇨🇳CN	assigned
210.21.59.0/24		🇨🇳CN	assigned
210.21.60.0/25		🇨🇳CN	assigned
210.21.60.128/25		🇨🇳CN	assigned
210.21.61.0/24		🇨🇳CN	assigned
210.21.62.0/24		🇨🇳CN	assigned
210.21.63.0/24		🇨🇳CN	assigned

Origin ASN

AS17622

CNCGROUP-GZ - China Unicom Guangzhou network

Related Prefixes

Covering prefix

210.21.0.0/17AS17622

More prefixes of AS17622

All prefixes of AS17622 →

Geolocation

Country🇨🇳ChinaCN

RegionGuangdong

CityGuangzhou

Coordinates23.1317, 113.2660 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the APNIC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/210.21.0.0/18

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

curl -s "https://api.ipctl.io/v1/prefix/210.21.0.0/18" | jq

External Links

RIPEstat