Home Prefix Lookup199.104.21.0/24

199.104.21.0/24 - Piedmont (AS402551)

IPv4ARINallocatedAS402551PIEDMON-ASN - Piedmont RPKI Valid

CIDR

199.104.21.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

Atlanta (Cumberland Hill)

RIR

ARIN

Status

allocated

Allocated

2026-06-17

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
199.104.21.0/24	AS402551 PIEDMON-ASN - Piedmont	Valid	ARIN	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
199.104.21.0/24	AS402551	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS402551	ARIN	MNT-PIEDMO	2026-06-25

Transfer History

Registry transfers of 199.104.21.0/24, blocks inside it, or blocks containing it.

199.104.21.0/24Transfer · 2026-06-18
University of Idaho
🇺🇸 US ARIN
→
Piedmont Healthcare, Inc.
🇺🇸 US ARIN
199.104.0.0/18M&A · 2018-10-29
WestNet, Inc.
🇺🇸 US ARIN
→
University of Idaho
🇺🇸 US ARIN

Date	Resource	From	To	Type
2026-06-18	199.104.21.0/24	University of Idaho 🇺🇸 US ARIN	Piedmont Healthcare, Inc. 🇺🇸 US ARIN	Transfer
2018-10-29	199.104.0.0/18	WestNet, Inc. 🇺🇸 US ARIN	University of Idaho 🇺🇸 US ARIN	M&A

Origin ASN

AS402551

PIEDMON-ASN - Piedmont

Related Prefixes

More prefixes of AS402551

192.189.58.0/24

All prefixes of AS402551 →

Geolocation

Country🇺🇸United StatesUS

RegionGeorgia

CityAtlanta (Cumberland Hill)

Coordinates33.8663, -84.4738 ↗

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/199.104.21.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/199.104.21.0/24" | jq

External Links

RIPEstat