Home Prefix Lookup203.168.136.0/21

203.168.136.0/21 - BGP Prefix

IPv4RIPE NCCallocated RPKI Invalid

CIDR

203.168.136.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

New York

RIR

RIPE NCC

Status

allocated

Allocated

2000-05-17

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

8 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
203.168.136.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.137.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.138.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.139.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.140.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.141.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.142.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13
203.168.143.0/24	AS20473 AS-VULTR - The Constant Company, LLC	Valid	-	2026-10-13

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
203.168.136.0/21	AS20473	/24	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS20473	Other IRR	MAINT-AS20473	2025-07-14

Transfer History

Registry transfers of 203.168.136.0/21, blocks inside it, or blocks containing it.

203.168.136.0/21inter-RIRTransfer · 2025-03-27
Hong Kong Cable Television Limited
🇭🇰 HK APNIC
→
truview LLC
RIPE NCC

Date	Resource	From	To	Type
2025-03-27	203.168.136.0/21inter-RIR	Hong Kong Cable Television Limited 🇭🇰 HK APNIC	truview LLC RIPE NCC	Transfer

Geolocation

Country🇺🇸United StatesUS

RegionNew York

CityNew York

Coordinates40.7128, -74.0060 ↗

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 RIPE NCC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/203.168.136.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/203.168.136.0/21" | jq

External Links

RIPEstat