DMARC Spoof Detection, Costa Rica
ClearClear FilterThis page shows DMARC authentication failures originating from Costa Rica. Learn more about this data.
Costa Rica accounts for 5 DMARC authentication failures observed by sh4meful over the observation window, sourced from 3 distinct IP addresses across 2 networks. This represents approximately 0.0% of total failure volume observed. Activity from Costa Rica has held roughly steady over the last 30 days. The most active source is MILLICOM CABLE COSTA RICA S.A. with 4 failures across 2 IP addresses.
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Top Networks in Costa Rica
Ten most active networks sourcing DMARC failures from Costa Rica:
| Network | Organization | Failures | Distinct IPs | Top City |
|---|---|---|---|---|
| MILLICOM CABLE COSTA RICA S.A. | — | 4 | 2 | San José |
| TELECABLE RESIDENCIAL | — | 1 | 1 | San José |
MILLICOM CABLE COSTA RICA S.A. and TELECABLE RESIDENCIAL together account for 100% of failure volume from this country. Concentration in a small number of networks suggests targeted infrastructure rather than diffuse compromise.
Failure Activity Over Time
Regional Context
Compared with peer geographies in Central America, Costa Rica's failure volume is above the regional median. Countries in this region collectively contributed 1% of failures observed.
Failures
Showing 1-5 of 5 failures, affecting 8 messages| Date ▼ | Source IP | Country | City | Network | Messages |
|---|---|---|---|---|---|
| 7/6/2025 | CR Costa Rica | San José | 1 | ||
| 4/4/2025 | CR Costa Rica | San José | 4 | ||
| 11/20/2024 | CR Costa Rica | San José | 1 | ||
| 11/12/2024 | CR Costa Rica | San José | 1 | ||
| 10/23/2024 | CR Costa Rica | San José | 1 |
What This Means
Country-level patterns don't imply that mail from Costa Rica is inherently malicious. Many failures reflect misconfigured legitimate senders, forwarded messages that break authentication, or automated infrastructure operating without authorization. Domain owners investigating a specific failure should look at the source IP and network details rather than the country alone. Our DMARC guide explains how to interpret these signals in your own reports.