Home Prefix Lookup40.171.0.0/16

40.171.0.0/16 - Microsoft Corporation (AS8075)

IPv4RIPE NCCallocatedAS8075MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation RPKI Valid

CIDR

40.171.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇬🇧 United Kingdom

City

London

RIR

RIPE NCC

Status

allocated

Allocated

1991-04-23

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
40.171.0.0/16	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	Valid	Other IRR	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
40.171.0.0/16	AS8075	/16	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS8075	Other IRR	MAINT-AS8075	2023-11-13

Transfer History

Registry transfers of 40.171.0.0/16, blocks inside it, or blocks containing it.

40.171.0.0/16inter-RIRTransfer · 2022-08-04
Eli Lilly and Company
🇺🇸 US ARIN
→
Microsoft Limited
RIPE NCC

Date	Resource	From	To	Type
2022-08-04	40.171.0.0/16inter-RIR	Eli Lilly and Company 🇺🇸 US ARIN	Microsoft Limited RIPE NCC	Transfer

Origin ASN

AS8075

MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation

Related Prefixes

More prefixes of AS8075

All prefixes of AS8075 →

Geolocation

Country🇬🇧United KingdomGB

RegionEngland

CityLondon

Coordinates51.5072, -0.1276 ↗

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 RIPE NCC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/40.171.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/40.171.0.0/16" | jq

External Links

RIPEstat