Home Prefix Lookup51.103.0.0/16

51.103.0.0/16 - Microsoft Corporation (AS8075)

IPv4RIPE NCCassignedAS8075MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation RPKI Valid

CIDR

51.103.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇫🇷 France

City

Paris

RIR

RIPE NCC

Status

assigned

Allocated

1993-09-01

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
51.103.0.0/16	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	Valid	Other IRRRIPE	2026-10-12

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
51.103.0.0/16	AS8075	/16	ripe

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS8075	Other IRR	MAINT-AS8075	2023-11-13
AS8075	RIPE	MICROSOFT-MAINT	2020-07-20

Origin ASN

AS8075

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

Related Prefixes

More prefixes of AS8075

All prefixes of AS8075 →

Geolocation

Country🇫🇷FranceFR

RegionÎle-de-France

CityParis

Coordinates48.8575, 2.3514 ↗

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/51.103.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/51.103.0.0/16" | jq

External Links

RIPEstat