Home Prefix Lookup204.137.40.0/21

204.137.40.0/21 - U.S. BANCORP (AS3147)

IPv4ARINannouncedAS3147US-BANCORP - U.S. BANCORPNo ROA

CIDR

204.137.40.0/21

IP Version

IPv4

Addresses

Mask

/21 (255.255.248.0)

Country

🇺🇸 United States

City

Washington D.C.

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
204.137.40.0/21	AS3147 US-BANCORP - U.S. BANCORP	No ROA	-	2026-10-12

More-Specific Announcements

4 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
204.137.40.0/23	AS3147 US-BANCORP - U.S. BANCORP	No ROA	-	2026-10-12
204.137.42.0/23	AS3147 US-BANCORP - U.S. BANCORP	No ROA	-	2026-10-12
204.137.44.0/23	AS3147 US-BANCORP - U.S. BANCORP	No ROA	-	2026-10-12
204.137.46.0/23	AS3147 US-BANCORP - U.S. BANCORP	No ROA	-	2026-10-12

Transfer History

Registry transfers of 204.137.40.0/21, blocks inside it, or blocks containing it.

204.137.32.0/19M&A · 2022-10-17
Downey Savings and Loan Association
🇺🇸 US ARIN
→
U.S. BANCORP
🇺🇸 US ARIN

Date	Resource	From	To	Type
2022-10-17	204.137.32.0/19	Downey Savings and Loan Association 🇺🇸 US ARIN	U.S. BANCORP 🇺🇸 US ARIN	M&A

Origin ASN

AS3147

US-BANCORP - U.S. BANCORP

Related Prefixes

More prefixes of AS3147

All prefixes of AS3147 →

Geolocation

Country🇺🇸United StatesUS

RegionDistrict of Columbia

CityWashington D.C.

Coordinates38.9072, -77.0369 ↗

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/204.137.40.0/21

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

curl -s "https://api.ipctl.io/v1/prefix/204.137.40.0/21" | jq

External Links

RIPEstat