Home Prefix Lookup121.31.0.0/16

121.31.0.0/16

🇨🇳

IPv4APNICallocatedAS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone RPKI Valid

CIDR

121.31.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇨🇳 China

City

Liuchow

RIR

APNIC

Status

allocated

Allocated

6/9/2006

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
121.31.0.0/16	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Valid	APNICRADB	5/31/2026

Covering Prefix

10 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
121.31.112.0/20	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.232.0/21	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.228.0/22	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.208.0/22	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Valid	—	5/31/2026
121.31.108.0/22	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.28.0/22	AS140886UNICOM-GX-IDC - UNICOM Guangxi province network	Valid	—	5/31/2026
121.31.40.0/22	AS140886UNICOM-GX-IDC - UNICOM Guangxi province network	Valid	—	5/31/2026
121.31.204.0/23	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.207.0/24	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026
121.31.206.0/24	AS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone	Invalid	—	5/31/2026

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
121.31.0.0/16	AS4837	/16	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4837	APNIC	MAINT-CNCGROUP-RR	9/4/2008
AS4837	RADB	MAINT-AS58453	11/13/2023

More Specific Prefixes

100

Prefix	AS	Country	Status
121.31.100.0/22		🇨🇳CN	assigned
121.31.204.0/23	AS4837	🇨🇳CN	assigned
121.31.244.0/23		🇨🇳CN	assigned
121.31.89.0/24		🇨🇳CN	assigned
121.31.80.0/24		🇨🇳CN	assigned
121.31.79.0/24		🇨🇳CN	assigned
121.31.95.0/24		🇨🇳CN	assigned
121.31.81.0/24		🇨🇳CN	assigned
121.31.90.0/24		🇨🇳CN	assigned
121.31.70.0/24		🇨🇳CN	assigned
121.31.123.0/24		🇨🇳CN	assigned
121.31.86.0/24		🇨🇳CN	assigned
121.31.77.0/24		🇨🇳CN	assigned
121.31.69.0/24		🇨🇳CN	assigned
121.31.76.0/24		🇨🇳CN	assigned
121.31.67.0/24		🇨🇳CN	assigned
121.31.78.0/24		🇨🇳CN	assigned
121.31.94.0/24		🇨🇳CN	assigned
121.31.91.0/24		🇨🇳CN	assigned
121.31.66.0/24		🇨🇳CN	assigned
121.31.240.0/24		🇨🇳CN	assigned
121.31.93.0/24		🇨🇳CN	assigned
121.31.75.0/24		🇨🇳CN	assigned
121.31.82.0/24		🇨🇳CN	assigned
121.31.87.0/24		🇨🇳CN	assigned
121.31.83.0/24		🇨🇳CN	assigned
121.31.71.0/24		🇨🇳CN	assigned
121.31.119.0/24		🇨🇳CN	assigned
121.31.72.0/24		🇨🇳CN	assigned
121.31.85.0/24		🇨🇳CN	assigned
121.31.242.0/24		🇨🇳CN	assigned
121.31.92.0/24		🇨🇳CN	assigned
121.31.73.0/24		🇨🇳CN	assigned
121.31.247.0/24		🇨🇳CN	assigned
121.31.88.0/24		🇨🇳CN	assigned
121.31.84.0/24		🇨🇳CN	assigned
121.31.243.0/25		🇨🇳CN	assigned
121.31.246.128/25		🇨🇳CN	assigned
121.31.243.128/25		🇨🇳CN	assigned
121.31.152.128/25		🇨🇳CN	assigned
121.31.241.0/25		🇨🇳CN	assigned
121.31.241.128/25		🇨🇳CN	assigned
121.31.246.0/25		🇨🇳CN	assigned
121.31.144.128/26		🇨🇳CN	assigned
121.31.126.128/26		🇨🇳CN	assigned
121.31.152.64/26		🇨🇳CN	assigned
121.31.144.64/26		🇨🇳CN	assigned
121.31.90.32/27		🇨🇳CN	assigned
121.31.74.32/27		🇨🇳CN	assigned
121.31.68.160/27		🇨🇳CN	assigned
121.31.90.0/27		🇨🇳CN	assigned
121.31.68.32/27		🇨🇳CN	assigned
121.31.144.32/27		🇨🇳CN	assigned
121.31.127.192/27		🇨🇳CN	assigned
121.31.144.192/27		🇨🇳CN	assigned
121.31.80.0/27		🇨🇳CN	assigned
121.31.127.160/27		🇨🇳CN	assigned
121.31.136.32/27		🇨🇳CN	assigned
121.31.80.64/27		🇨🇳CN	assigned
121.31.90.96/27		🇨🇳CN	assigned
121.31.112.64/27		🇨🇳CN	assigned
121.31.80.96/27		🇨🇳CN	assigned
121.31.63.32/27		🇨🇳CN	assigned
121.31.114.96/27		🇨🇳CN	assigned
121.31.74.96/27		🇨🇳CN	assigned
121.31.80.32/27		🇨🇳CN	assigned
121.31.68.0/27		🇨🇳CN	assigned
121.31.68.96/27		🇨🇳CN	assigned
121.31.74.0/27		🇨🇳CN	assigned
121.31.152.32/27		🇨🇳CN	assigned
121.31.68.64/27		🇨🇳CN	assigned
121.31.68.224/27		🇨🇳CN	assigned
121.31.68.192/27		🇨🇳CN	assigned
121.31.68.128/27		🇨🇳CN	assigned
121.31.90.64/27		🇨🇳CN	assigned
121.31.63.16/28		🇨🇳CN	assigned
121.31.62.128/28		🇨🇳CN	assigned
121.31.113.208/28		🇨🇳CN	assigned
121.31.57.208/28		🇨🇳CN	assigned
121.31.62.208/28		🇨🇳CN	assigned
121.31.127.16/28		🇨🇳CN	assigned
121.31.60.16/28		🇨🇳CN	assigned
121.31.152.16/28		🇨🇳CN	assigned
121.31.60.48/28		🇨🇳CN	assigned
121.31.144.224/28		🇨🇳CN	assigned
121.31.126.96/28		🇨🇳CN	assigned
121.31.112.96/28		🇨🇳CN	assigned
121.31.56.0/28		🇨🇳CN	assigned
121.31.144.16/28		🇨🇳CN	assigned
121.31.127.0/28		🇨🇳CN	assigned
121.31.56.16/28		🇨🇳CN	assigned
121.31.136.16/28		🇨🇳CN	assigned
121.31.57.176/28		🇨🇳CN	assigned
121.31.114.240/28		🇨🇳CN	assigned
121.31.62.224/28		🇨🇳CN	assigned
121.31.57.32/28		🇨🇳CN	assigned
121.31.56.32/28		🇨🇳CN	assigned
121.31.126.64/28		🇨🇳CN	assigned
121.31.60.144/28		🇨🇳CN	assigned
121.31.60.160/28		🇨🇳CN	assigned

Origin ASN

AS4837

CHINA169-Backbone - CHINA UNICOM China169 Backbone

Geolocation

Country🇨🇳ChinaCN

RegionGuangxi

CityLiuchow

Coordinates24.3255, 109.4150 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/121.31.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/121.31.0.0/16" | jq

External Links

RIPEstat Hurricane Electric BGP