Home Prefix Lookup203.173.80.0/21

203.173.80.0/21 - BGP Prefix

IPv4APNICallocated RPKI Valid

CIDR

203.173.80.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇹🇭 Thailand

City

Bangkok

RIR

APNIC

Status

allocated

Allocated

2006-04-21

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

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Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below.

More-Specific Announcements

1 more-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
203.173.80.0/22	AS56309 SIAMDATA-TH Siamdata Communication Co.,Ltd.	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.173.80.0/21	AS56309	/24	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS56309	APNIC	MAINT-READYIDC-TH	2026-10-02

More Specific Prefixes

Prefix	Country	Status
203.173.80.0/24	🇹🇭TH	assigned
203.173.81.0/24	🇹🇭TH	assigned
203.173.82.0/24	🇹🇭TH	assigned
203.173.83.0/24	🇹🇭TH	assigned
203.173.84.0/24	🇹🇭TH	assigned
203.173.85.0/24	🇹🇭TH	assigned
203.173.86.0/24	🇹🇭TH	assigned
203.173.87.0/24	🇹🇭TH	assigned

Transfer History

Registry transfers of 203.173.80.0/21, blocks inside it, or blocks containing it.

203.173.80.0/21Transfer · 2026-09-18
Foresightwave INC.
🇯🇵 JP APNIC
→
READYIDC CO., LTD.
🇹🇭 TH APNIC
203.173.80.0/21Transfer · 2012-02-09
Sanmedia Corporation
🇯🇵 JP APNIC
→
Foresightwave INC.
🇯🇵 JP APNIC

Date	Resource	From	To	Type
2026-09-18	203.173.80.0/21	Foresightwave INC. 🇯🇵 JP APNIC	READYIDC CO., LTD. 🇹🇭 TH APNIC	Transfer
2012-02-09	203.173.80.0/21	Sanmedia Corporation 🇯🇵 JP APNIC	Foresightwave INC. 🇯🇵 JP APNIC	Transfer

Geolocation

Country🇹🇭ThailandTH

RegionBangkok

CityBangkok

Coordinates13.7563, 100.5020 ↗

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/203.173.80.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/203.173.80.0/21" | jq

External Links

RIPEstat