Home Prefix Lookup203.121.240.0/20

203.121.240.0/20 - DaDa Broadband (AS18419)

IPv4APNICallocatedAS18419DADA-AS-TW - DaDa Broadband LTD. RPKI Valid

CIDR

203.121.240.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇹🇼 Taiwan

City

Taipei

RIR

APNIC

Status

allocated

Allocated

2006-04-19

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
203.121.240.0/20	AS18419 DADA-AS-TW - DaDa Broadband LTD.	Valid	Other IRR	2026-10-12

More-Specific Announcements

1 more-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
203.121.248.0/21	AS18419 DADA-AS-TW - DaDa Broadband LTD.	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.121.240.0/20	AS4780	/24	apnic
203.121.240.0/20	AS18419	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS18419	Other IRR	MAINT-AS4780	2026-03-13
AS4780	Other IRR	MAINT-AS4780	2026-03-13

Origin ASN

AS18419

DADA-AS-TW - DaDa Broadband LTD.

Related Prefixes

More prefixes of AS18419

All prefixes of AS18419 →

Geolocation

Country🇹🇼TaiwanTW

RegionTaiwan

CityTaipei

Coordinates25.0330, 121.5650 ↗

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/203.121.240.0/20

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

curl -s "https://api.ipctl.io/v1/prefix/203.121.240.0/20" | jq

External Links

RIPEstat