129.19.0.0/18

🇺🇸

CIDR

129.19.0.0/18

IP Version

IPv4

Addresses

16.3K

Mask

/18 (255.255.192.0)

Country

🇺🇸 United States

City

Fort Collins

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
129.19.0.0/18	AS12145COLORADOSTATEUNIV - Colorado State University	Valid	ARINRADB	5/31/2026

3 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
129.19.0.0/16	AS14041AS-FRGP - University Corporation for Atmospheric Research	Valid	—	5/31/2026
129.19.3.0/24	AS12145COLORADOSTATEUNIV - Colorado State University	Valid	—	5/31/2026
129.19.6.0/24	AS31991PRPA - Platte River Power Authority	Valid	—	5/31/2026

Prefix	Origin	Max Length	Trust Anchor
129.19.0.0/18	AS12145	/24	arin
129.19.0.0/16	AS14041	/16	arin

Origin	Registry	Maintainer	Modified
AS12145	ARIN	MNT-CSU-2-Z	4/18/2026
AS12145	RADB	MAINT-AS14041	11/13/2023

Origin ASN

Geolocation

Country🇺🇸United StatesUS

RegionColorado

CityFort Collins

API

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

curl -s "https://api.ipctl.io/v1/prefix/129.19.0.0/18" | jq

External Links