Home Prefix Lookup153.51.216.0/21

153.51.216.0/21 - Cloudflare (AS13335)

IPv4RIPEassignedAS13335CLOUDFLARENET - Cloudflare, Inc. RPKI Valid

CIDR

153.51.216.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇪🇸 Spain

City

Madrid

RIR

RIPE

Status

assigned

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
153.51.216.0/21	AS13335 CLOUDFLARENET - Cloudflare, Inc.	Valid	RIPE	2026-10-14

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
153.51.216.0/21	AS13335	/21	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS13335	RIPE	mnt-ipbroker	2026-09-25

Transfer History

Registry transfers of 153.51.216.0/21, blocks inside it, or blocks containing it.

153.51.192.0/18inter-RIRTransfer · 2026-03-04
NCR Voyix Corporation
🇺🇸 US ARIN
→
Valor Information Technologies, S.L.
🇪🇸 ES RIPE NCC

Date	Resource	From	To	Type
2026-03-04	153.51.192.0/18inter-RIR	NCR Voyix Corporation 🇺🇸 US ARIN	Valor Information Technologies, S.L. 🇪🇸 ES RIPE NCC	Transfer

Origin ASN

AS13335

CLOUDFLARENET - Cloudflare, Inc.

Related Prefixes

More prefixes of AS13335

All prefixes of AS13335 →

Geolocation

Country🇪🇸SpainES

RegionMadrid

CityMadrid

Coordinates40.4168, -3.7038 ↗

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 transfer marketTransfers published by all five RIRs

API

Open

GEThttps://api.ipctl.io/v1/prefix/153.51.216.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/153.51.216.0/21" | jq

External Links

RIPEstat