Shame on you, stupid spammers.. Sh4meful  DMARC Spoof Detection

IP Address: 202.160.135.133

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

Geolocation Information
Country:
IN India
Coordinates:
21.9974, 79.0011
WHOIS Information
Network Name:
JDMBROADBANDSERVICESPVTLTD
CIDR:
202.160.132.0/22
Owner:
Jdm Broadband Services Pvt Ltd

Analysis

This IP was observed generating a single DMARC authentication failure on July 1, 2025. With only one data point, the event is better read as a single suspicious observation than a sustained campaign. Every message observed from this source failed both SPF and DKIM verification. Receiving mail providers applied a quarantine disposition, routing messages to spam or junk folders.

The address has no reverse DNS record. Legitimate mail infrastructure almost always publishes a PTR record, because major receivers (Gmail, Microsoft 365, Yahoo) penalize or reject mail without one, and because it is a baseline operational hygiene expectation. Its absence, combined with authentication failure, is consistent with a host being used to originate spoofed mail rather than one misconfigured by a legitimate operator.

Geolocation places the host in India, on infrastructure operated by Jdm Broadband Services Pvt Ltd. Abuse-reporting channels in this jurisdiction are generally responsive, and reports to the network operator can result in timely remediation.

The address is registered to Jdm Broadband Services Pvt Ltd (JDMBROADBANDSERVICESPVTLTD). Enterprise-registered addresses that appear in DMARC failure data are typically either compromised hosts on the organization's network or outbound mail relays that are not properly authorized in the domain's SPF record.

Across the wider JDMBROADBANDSERVICESPVTLTD network, 2 distinct IPs have been associated with 2 authentication failures over 2 observed messages, spanning 1 country. Activity on this network is sparse in this dataset, suggesting isolated rather than systematic abuse.

If your domain appears in the From header of mail from this address, treat it as probable spoofing. Verify that your SPF record does not authorize this host, directly or through nested include mechanisms, and that no DKIM selector you publish has been issued to it. If both checks come back clean, the receiver's quarantine action is doing its job.

Your DMARC policy posture matters more than any IP-level response here. The enforcement action applied to this mail indicates your policy is already providing protection. Maintaining p=reject across all your domains closes the gap for attackers who manage partial alignment. Domains that remain at p=none long-term tend to be impersonated repeatedly, because the cost to the attacker of attempting is effectively zero.

Blocking this individual address has limited durability: an attacker can rotate to another address in the same /24 subnet at effectively zero cost. More durable responses include monitoring aggregate DMARC reports so new sources are visible as they emerge, tightening SPF to remove overly permissive include chains or +all mechanisms, and ensuring DKIM is signing every legitimate outbound stream so alignment failures are unambiguous. The formal abuse contact for Jdm Broadband Services Pvt Ltd is listed in APNIC WHOIS records, and timely remediation is achievable through that channel.

Failures Detected from this IP
Showing 1-1 of 1 failures, affecting 1 message
External Reputation Lookups

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