Home Prefix Lookup204.242.178.0/23

204.242.178.0/23 - Level 3 Parent (AS10753)

IPv4ARINannouncedAS10753LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE - Level 3 Parent, LLCNo ROA

CIDR

204.242.178.0/23

IP Version

IPv4

Addresses

512

Mask

/23 (255.255.254.0)

Country

🇺🇸 United States

City

Ashburn

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
204.242.178.0/23	AS10753 LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE - Level 3 Parent, LLC	No ROA	Other IRR	2026-10-11

Covering Prefix

2 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
204.240.0.0/14	AS174 COGENT-174 - Cogent Communications, LLC	No ROA	-	2026-10-11
204.242.176.0/20	AS6079 RCN-AS - RCN	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS10753	Other IRR	MAINT-AS398465	2026-07-06

Transfer History

Registry transfers of 204.242.178.0/23, blocks inside it, or blocks containing it.

204.240.0.0/14M&A · 2025-09-23
PSINet, Inc.
🇺🇸 US ARIN
→
Cogent Communications
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-09-23	204.240.0.0/14	PSINet, Inc. 🇺🇸 US ARIN	Cogent Communications 🇺🇸 US ARIN	M&A

Origin ASN

AS10753

LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE - Level 3 Parent, LLC

Related Prefixes

Covering prefix

204.242.176.0/20AS6079

More prefixes of AS10753

All prefixes of AS10753 →

Geolocation

Country🇺🇸United StatesUS

RegionVirginia

CityAshburn

Coordinates39.0438, -77.4874 ↗

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/204.242.178.0/23

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

curl -s "https://api.ipctl.io/v1/prefix/204.242.178.0/23" | jq

External Links

RIPEstat