Home Prefix Lookup40.181.0.0/16

40.181.0.0/16 - Amazon.Com (AS16509)

IPv4ARINannouncedAS16509AMAZON-02 - Amazon.com, Inc. RPKI Valid

CIDR

40.181.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇮🇪 Ireland

City

Dublin

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
40.181.0.0/16	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	Other IRR	2026-10-11

Covering Prefix

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
40.180.0.0/15	AS16509 AMAZON-02 - Amazon.com, Inc.	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
40.181.0.0/16	AS16509	/16	arin
40.180.0.0/15	AS14618	/15	arin
40.180.0.0/15	AS16509	/15	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS16509	Other IRR	MAINT-AS16509	2026-08-12

Transfer History

Registry transfers of 40.181.0.0/16, blocks inside it, or blocks containing it.

40.181.0.0/16Transfer · 2022-06-29
Eli Lilly and Company
🇺🇸 US ARIN
→
Amazon.com, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2022-06-29	40.181.0.0/16	Eli Lilly and Company 🇺🇸 US ARIN	Amazon.com, Inc. 🇺🇸 US ARIN	Transfer

Origin ASN

AS16509

AMAZON-02 - Amazon.com, Inc.

Related Prefixes

Covering prefix

40.180.0.0/15AS16509

More prefixes of AS16509

All prefixes of AS16509 →

Geolocation

Country🇮🇪IrelandIE

CityDublin

Coordinates53.3498, -6.2603 ↗

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/40.181.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/40.181.0.0/16" | jq

External Links

RIPEstat