Home Prefix Lookup143.204.0.0/16

143.204.0.0/16

🇺🇸

IPv4ARINallocated Anycast RPKI Valid

CIDR

143.204.0.0/16

IP Version

IPv4

Addresses

65.5K

Mask

/16 (255.255.0.0)

Country

🇺🇸 United States

City

Seattle

RIR

ARIN

Status

allocated

Allocated

1/5/2018

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not currently announced in BGP. See covering prefix below.

Covering Prefix

119 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
143.204.128.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.32.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.160.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.176.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.144.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.48.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.192.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.240.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.112.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.80.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.8.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.224.0/21	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.20.0/22	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.68.0/22	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.238.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.78.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.126.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.174.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.254.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.6.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.30.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.66.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.190.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.142.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.46.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.0.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.110.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.222.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.18.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.158.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.58.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.60.0/23	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.91.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.92.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.105.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.106.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.107.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.108.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.109.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.120.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.121.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.122.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.123.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.124.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.125.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.136.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.137.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.138.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.139.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.140.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.141.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.152.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.153.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.155.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.156.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.157.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.168.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.169.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.170.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.171.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.172.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.173.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.184.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.185.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.186.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.187.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.188.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.189.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.200.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.203.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.204.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.217.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.218.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.219.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.220.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.221.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.232.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.233.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.234.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.235.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.236.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.237.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.248.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.249.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.250.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.251.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.253.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.154.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.2.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.3.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.4.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.5.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.16.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.17.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.24.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.25.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.26.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.27.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.28.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.29.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.40.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.41.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.42.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.43.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.44.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.45.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.56.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.57.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.62.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.63.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.64.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.65.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.72.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.73.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.74.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.75.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.76.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.77.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026
143.204.88.0/24	AS16509AMAZON-02 - Amazon.com, Inc.	Valid	—	6/15/2026

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
143.204.0.0/16	AS16509	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS16509	RADB	MAINT-AS16509	11/13/2023

Geolocation

This is an anycast prefix. The location shown is the organization HQ — actual server location varies by your network path.

Country🇺🇸United StatesUS

RegionWashington

CitySeattle

TimezoneAmerica/Los_Angeles

Coordinates47.6062, -122.3321 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/143.204.0.0/16

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

curl -s "https://api.ipctl.io/v1/prefix/143.204.0.0/16" | jq

External Links

RIPEstat Hurricane Electric BGP