IP Address: 216.40.44.21

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

Geolocation Information

Country:: CA Canada
Coordinates:: 43.6319, -79.3716

WHOIS Information

Network Name:: TUCOW-BLK01
CIDR:: 216.40.32.0/20
Owner:: Tucows.com Co.
Org ID:: TUCOW
Address:: 96 Mowat Avenue, Toronto, ON M6K-3M1
Reverse DNS:: smtprelay0021.hostedemail.com
Last updated: 2/5/2026

Analysis

This IP was observed on a single date: December 16, 2024. It has been associated with 1 failed authentication event affecting 1 message — a single isolated event. The IP belongs to TUCOW-BLK01 (Tucows.com Co.), a network with activity associated with Canada. 3 other IPs in the same /24 subnet (216.40.44.*) also appear in this dataset.

Network Topology

Failures Detected from this IP

Showing 1-1 of 1 failures, affecting 1 message

Date ▼	Messages
12/16/2024	1

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 216.40.44.0/24 range observed failing DMARC:

216.40.44.18 (1 failure), 216.40.44.19 (1 failure), 216.40.44.23 (1 failure)