Home Prefix Lookup209.131.0.0/19

209.131.0.0/19 - 123.Net (AS12129)

IPv4ARINallocatedAS12129123NET - 123.Net, Inc. RPKI Valid

CIDR

209.131.0.0/19

IP Version

IPv4

Addresses

8.1K

Mask

/19 (255.255.224.0)

Country

🇺🇸 United States

City

Southfield

RIR

ARIN

Status

allocated

Allocated

1997-08-26

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
209.131.0.0/19	AS12129 123NET - 123.Net, Inc.	Valid	-	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
209.131.0.0/19	AS12129	/19	arin

Transfer History

Registry transfers of 209.131.0.0/19, blocks inside it, or blocks containing it.

209.131.0.0/19M&A · 2017-09-19
Michigan Internet Cooperative Association
🇺🇸 US ARIN
→
123.Net, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2017-09-19	209.131.0.0/19	Michigan Internet Cooperative Association 🇺🇸 US ARIN	123.Net, Inc. 🇺🇸 US ARIN	M&A

Origin ASN

AS12129

123NET - 123.Net, Inc.

Related Prefixes

More prefixes of AS12129

All prefixes of AS12129 →

Geolocation

Country🇺🇸United StatesUS

RegionMichigan

CitySouthfield

Coordinates42.4716, -83.2381 ↗

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/209.131.0.0/19

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

curl -s "https://api.ipctl.io/v1/prefix/209.131.0.0/19" | jq

External Links

RIPEstat