Home Prefix Lookup203.119.128.0/20

203.119.128.0/20 - Hangzhou Alibaba Advertising (AS37963)

IPv4APNICannouncedAS37963ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd. RPKI Valid

CIDR

203.119.128.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇨🇳 China

City

Hangzhou

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
203.119.128.0/20	AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd.	Valid	APNIC	2026-10-13

More-Specific Announcements

1 more-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
203.119.128.0/21	AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd.	Valid	-	2026-10-13

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.119.128.0/17	AS37963	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS37963	APNIC	MAINT-CNNIC-AP	2020-06-28
AS45102	APNIC	MAINT-CNNIC-AP	2020-06-28

Transfer History

Registry transfers of 203.119.128.0/20, blocks inside it, or blocks containing it.

203.119.128.0/17Transfer · 2015-12-01
China Internet Network Information Center/Es-F-B
🇨🇳 CN APNIC
→
China Internet Network Information Center/ALIBABA-CN-NET
🇨🇳 CN APNIC

Date	Resource	From	To	Type
2015-12-01	203.119.128.0/17	China Internet Network Information Center/Es-F-B 🇨🇳 CN APNIC	China Internet Network Information Center/ALIBABA-CN-NET 🇨🇳 CN APNIC	Transfer

Origin ASN

AS37963

ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd.

Related Prefixes

More prefixes of AS37963

All prefixes of AS37963 →

Geolocation

Country🇨🇳ChinaCN

RegionZhejiang

CityHangzhou

Coordinates30.2742, 120.1550 ↗

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/203.119.128.0/20

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

curl -s "https://api.ipctl.io/v1/prefix/203.119.128.0/20" | jq

External Links

RIPEstat