IP Address: 23.21.109.197

This page shows DMARC authentication failure data for this IP address. Learn more about this data.

Geolocation Information

Country:: US United States
Region:: Virginia
City:: Ashburn
Coordinates:: 39.0469, -77.4903

WHOIS Information

Network Name:: AMAZON-EC2-USEAST-10
CIDR:: 23.20.0.0/14
Owner:: Amazon.com, Inc.
Org ID:: AMAZO-4
Address:: Amazon Web Services, Inc. P.O. Box 81226, Seattle, WA 98108-1226
Reverse DNS:: psm.knowbe4.com
Last updated: 2/5/2026

Analysis

This IP was observed on a single date: June 5, 2025. It has been associated with 1 failed authentication event affecting 3 messages — a single isolated event. The IP belongs to AMAZON-EC2-USEAST-10 (Amazon.com, Inc.), a network with activity associated with United States. One other IP in the same /24 subnet (23.21.109.*) also appears in this dataset.

Failures Detected from this IP

Showing 1-1 of 1 failures, affecting 3 messages

Date ▼	Messages
6/5/2025	3

External Reputation Lookups

Look up this IP in external threat intelligence and reputation databases (opens in new tab):

AbuseIPDB Cisco Talos Project Honey Pot GreyNoise VirusTotal Shodan Censys Spamhaus

Nearby IPs

Other IPs in the 23.21.109.0/24 range observed failing DMARC:

23.21.109.212 (1 failure)