IP Blocks
U.S. Source Of Most IP Blocks Globally
According to Cisco, IP connection blocks are spam messages that are immediately blocked by spam-detecting technology. This is due to the technology recognising a spam sender with a bad repuation score. The number of IP connection blocks worldwide has increased steadily over the past year and the United States has the most of them with over 2 million.
Leading countries of origin for unsolicited spam e-mails worldwide in 2025, by share of spam volume
Daily number of spam e-mails sent worldwide as of December 2024, by country (in billions)
Monthly number of phone advertising and spam calls blocked by 360 security software in China in 1st quarter 2022 (in billions)
Reasons for journalists blocking public relations communications worldwide as of February 2022
Monthly share of spam in the total e-mail traffic worldwide from January 2014 to December 2025
Malware types most frequently blocked in malicious files worldwide in 2022 (in millions)
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