Home Prefix Lookup221.12.100.0/24

221.12.100.0/24 - CHINA UNICOM China169 Backbone (AS4837)

IPv4APNICannouncedAS4837CHINA169-Backbone - CHINA UNICOM China169 Backbone RPKI Valid

CIDR

221.12.100.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇨🇳 China

City

Hangzhou (Binjiang Qu)

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
221.12.100.0/24	AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone	Valid	-	2026-10-13

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
221.12.0.0/17	AS4837 CHINA169-Backbone - CHINA UNICOM China169 Backbone	Valid	-	2026-10-13

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
221.12.100.0/24	AS4837	/24	apnic
221.12.0.0/17	AS4837	/17	apnic

More Specific Prefixes

Prefix	Country	Status
221.12.100.0/30	🇨🇳CN	assigned
221.12.100.4/30	🇨🇳CN	assigned
221.12.100.8/30	🇨🇳CN	assigned
221.12.100.12/30	🇨🇳CN	assigned
221.12.100.24/30	🇨🇳CN	assigned
221.12.100.28/30	🇨🇳CN	assigned
221.12.100.32/30	🇨🇳CN	assigned
221.12.100.40/30	🇨🇳CN	assigned
221.12.100.44/30	🇨🇳CN	assigned
221.12.100.48/30	🇨🇳CN	assigned
221.12.100.52/30	🇨🇳CN	assigned
221.12.100.56/29	🇨🇳CN	assigned
221.12.100.64/30	🇨🇳CN	assigned
221.12.100.68/30	🇨🇳CN	assigned
221.12.100.72/30	🇨🇳CN	assigned
221.12.100.76/30	🇨🇳CN	assigned
221.12.100.80/30	🇨🇳CN	assigned
221.12.100.88/30	🇨🇳CN	assigned
221.12.100.92/30	🇨🇳CN	assigned
221.12.100.96/29	🇨🇳CN	assigned
221.12.100.104/29	🇨🇳CN	assigned
221.12.100.112/29	🇨🇳CN	assigned
221.12.100.120/30	🇨🇳CN	assigned
221.12.100.124/30	🇨🇳CN	assigned
221.12.100.128/29	🇨🇳CN	assigned
221.12.100.136/30	🇨🇳CN	assigned
221.12.100.144/29	🇨🇳CN	assigned
221.12.100.156/30	🇨🇳CN	assigned
221.12.100.180/30	🇨🇳CN	assigned

Origin ASN

AS4837

CHINA169-Backbone - CHINA UNICOM China169 Backbone

Related Prefixes

Covering prefix

221.12.0.0/17AS4837

More prefixes of AS4837

All prefixes of AS4837 →

Geolocation

Country🇨🇳ChinaCN

RegionZhejiang

CityHangzhou (Binjiang Qu)

Coordinates30.1835, 120.1680 ↗

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/221.12.100.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/221.12.100.0/24" | jq

External Links

RIPEstat