Home Prefix Lookup8.21.11.0/24

8.21.11.0/24 - Cloudflare (AS13335)

IPv4ARINannouncedAS13335CLOUDFLARENET - Cloudflare, Inc.No ROA

CIDR

8.21.11.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

San Francisco (South Beach)

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
8.21.11.0/24	AS13335 CLOUDFLARENET - Cloudflare, Inc.	No ROA	ARIN	2026-10-11

Covering Prefix

2 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
8.0.0.0/9	AS3356 LEVEL3 - Level 3 Parent, LLC	No ROA	-	2026-10-11
8.16.0.0/12	AS3356 LEVEL3 - Level 3 Parent, LLC	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS13335	ARIN	MNT-CLOUD14	-

Transfer History

Registry transfers of 8.21.11.0/24, blocks inside it, or blocks containing it.

8.0.0.0/8M&A · 2018-02-20
Level 3 Communications, Inc.
🇺🇸 US ARIN
→
Level 3 Parent, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2018-02-20	8.0.0.0/8	Level 3 Communications, Inc. 🇺🇸 US ARIN	Level 3 Parent, LLC 🇺🇸 US ARIN	M&A

Origin ASN

AS13335

CLOUDFLARENET - Cloudflare, Inc.

Related Prefixes

Covering prefix

8.16.0.0/12AS3356

More prefixes of AS13335

All prefixes of AS13335 →

Geolocation

Country🇺🇸United StatesUS

RegionCalifornia

CitySan Francisco (South Beach)

Coordinates37.7803, -122.3900 ↗

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 ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/8.21.11.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/8.21.11.0/24" | jq

External Links

RIPEstat