Home Prefix Lookup204.52.16.0/20

204.52.16.0/20 - BGP Prefix

IPv4ARINallocated RPKI Valid

CIDR

204.52.16.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇺🇸 United States

City

Denver (Cherry Creek)

RIR

ARIN

Status

allocated

Allocated

2022-09-13

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Swipe sideways to see all columns →

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

3 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
204.52.22.0/24	AS26356 CRUSOE - CRUSOE ENERGY SYSTEMS LLC	Valid	-	2026-10-12
204.52.23.0/24	AS26356 CRUSOE - CRUSOE ENERGY SYSTEMS LLC	Valid	-	2026-10-12
204.52.24.0/21	AS26356 CRUSOE - CRUSOE ENERGY SYSTEMS LLC	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
204.52.16.0/20	AS26356	/24	arin
204.52.16.0/20	AS399507	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS26356	ARIN	MNT-CES-457	2026-04-07
AS399507	ARIN	MNT-CES-457	2026-04-07
AS399507	Other IRR	MAINT-AS399507	2023-11-13
AS26356	Other IRR	MAINT-AS399507	2023-11-13

Transfer History

Registry transfers of 204.52.16.0/20, blocks inside it, or blocks containing it.

204.52.16.0/20Transfer · 2022-09-13
Sprint
🇺🇸 US ARIN
→
Crusoe Energy Systems Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2022-09-13	204.52.16.0/20	Sprint 🇺🇸 US ARIN	Crusoe Energy Systems Inc. 🇺🇸 US ARIN	Transfer

Geolocation

Country🇺🇸United StatesUS

RegionColorado

CityDenver (Cherry Creek)

Coordinates39.7203, -104.9540 ↗

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/204.52.16.0/20

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

curl -s "https://api.ipctl.io/v1/prefix/204.52.16.0/20" | jq

External Links

RIPEstat