Home Prefix Lookup72.57.2.0/24

72.57.2.0/24 - BIF IV (AS394056)

IPv4ARINannouncedAS394056BIFIV - BIF IV RPKI Valid

CIDR

72.57.2.0/24

IP Version

IPv4

Addresses

256

Mask

/24 (255.255.255.0)

Country

🇺🇸 United States

City

Pueblo (Downtown)

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
72.57.2.0/24	AS394056 BIFIV - BIF IV	Valid	-	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
72.57.0.0/19	AS394056	/25	arin

Transfer History

Registry transfers of 72.57.2.0/24, blocks inside it, or blocks containing it.

72.57.0.0/19Transfer · 2025-07-30
T-Mobile USA, Inc.
🇺🇸 US ARIN
→
BIF IV
🇺🇸 US ARIN
72.56.0.0/13M&A · 2020-12-31
Sprint Communications, Inc.
🇺🇸 US ARIN
→
T-Mobile USA, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2025-07-30	72.57.0.0/19	T-Mobile USA, Inc. 🇺🇸 US ARIN	BIF IV 🇺🇸 US ARIN	Transfer
2020-12-31	72.56.0.0/13	Sprint Communications, Inc. 🇺🇸 US ARIN	T-Mobile USA, Inc. 🇺🇸 US ARIN	M&A

Origin ASN

AS394056

BIFIV - BIF IV

Related Prefixes

More prefixes of AS394056

All prefixes of AS394056 →

Geolocation

Country🇺🇸United StatesUS

RegionColorado

CityPueblo (Downtown)

Coordinates38.2704, -104.6090 ↗

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/72.57.2.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/72.57.2.0/24" | jq

External Links

RIPEstat