Home Prefix Lookup203.104.16.0/21

203.104.16.0/21 - Yahoo Holdings (AS10310)

IPv4APNICallocatedAS10310YAHOO-1 - Yahoo Holdings Inc.No ROA

CIDR

203.104.16.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇸🇬 Singapore

City

Singapore

RIR

APNIC

Status

allocated

Allocated

2006-03-14

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
203.104.16.0/21	AS10310 YAHOO-1 - Yahoo Holdings Inc.	No ROA	APNICOther IRR	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS10310	APNIC	MAINT-AP-YAHOO-INC	2025-06-24
AS10310	Other IRR	MAINT-YAHOO	2023-11-13

More Specific Prefixes

Prefix	AS	Country	Status
203.104.16.0/22		🇸🇬SG	assigned
203.104.20.0/22		🇸🇬SG	assigned

Transfer History

Registry transfers of 203.104.16.0/21, blocks inside it, or blocks containing it.

203.104.16.0/21Transfer · 2023-03-23
Yahoo India Private Limited
🇮🇳 IN APNIC
→
Yahoo Inc.
APNIC

Date	Resource	From	To	Type
2023-03-23	203.104.16.0/21	Yahoo India Private Limited 🇮🇳 IN APNIC	Yahoo Inc. APNIC	Transfer

Origin ASN

AS10310

YAHOO-1 - Yahoo Holdings Inc.

Related Prefixes

More prefixes of AS10310

All prefixes of AS10310 →

Geolocation

Country🇸🇬SingaporeSG

CitySingapore

Coordinates1.3521, 103.8200 ↗

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/203.104.16.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/203.104.16.0/21" | jq

External Links

RIPEstat