DMARC Spoof Detection, Colombia
Clear Clear FilterThis page shows DMARC authentication failures originating from Colombia. Learn more about this data.
Colombia accounts for 34 DMARC authentication failures observed by sh4meful over the observation window, sourced from 32 distinct IP addresses across 11 networks. This represents approximately 0.1% of total failure volume observed. Activity from Colombia has increased over the last 30 days compared with the prior 30-day period. The most active source is Telmex Colombia S.A. with 11 failures across 9 IP addresses.
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Top Networks in Colombia
Ten most active networks sourcing DMARC failures from Colombia:
| Network | Organization | Failures | Distinct IPs | Top City |
|---|---|---|---|---|
| Telmex Colombia S.A. | — | 11 | 9 | Medellín |
| COLOMBIA TELECOMUNICACIONES S.A. ESP BIC | — | 7 | 7 | Bogotá |
| UNE EPM TELECOMUNICACIONES S.A. | — | 2 | 2 | Armenia |
| ETB - Colombia | — | 3 | 3 | Bogotá |
| Colombia Móvil | — | 3 | 3 | Medellín |
| TV AZTECA SUCURSAL COLOMBIA | — | 2 | 2 | San José del Guaviare |
| CONEXION DIGITAL EXPRESS S.A.S. | — | 1 | 1 | Bogotá |
| SERVYCOM COLOMBIA S.A.S | — | 1 | 1 | Medellín |
| WORLD CONNECTION | — | 1 | 1 | Maicao |
| EVERNET SAS | — | 1 | 1 | Chía |
Telmex Colombia S.A. and COLOMBIA TELECOMUNICACIONES S.A. ESP BIC together account for 53% of failure volume from this country. Distribution across many networks is consistent with commodity spoofing infrastructure operating from this geography.
Failure Activity Over Time
Peak activity was observed in the week of August 10, 2026 with 25 failures recorded. Activity in the most recent 30-day window increased sharply compared with the prior period (33 vs 10 failures).
Regional Context
Compared with peer geographies in South America, Colombia's failure volume is above the regional median. Countries in this region collectively contributed 1% of failures observed.
Failures
Showing 31-34 of 34 failures, affecting 118 messages| Date ▲ | Source IP | Country | City | Network | Messages |
|---|---|---|---|---|---|
| 8/2/2026 | CO Colombia | Medellín | 3 | ||
| 8/3/2026 | CO Colombia | Medellín | 4 | ||
| 8/11/2026 | CO Colombia | Cali | 1 | ||
| 8/12/2026 | CO Colombia | Armenia | 24 |
What This Means
Country-level patterns don't imply that mail from Colombia 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.